SEPT

. 1115 C

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Air

R A D 10 WORLD September 11, 1926

The exquisite drum type of tun-ing is made available to homeconstructors of radio receiversby the brilliant ingenuity ofWilliam A. Bruno, who has de-signed the most beautiful drumtuning control on the market.

This is the Unitune. so-calledbecause it enables the tuningcontrols to be adjusted, so tun-ing can be accomplished withone up or down motion. Thedrums themselves are independ-ently available.

$3.50 per pairwith plate.

Announces New Tuning Unit thatSimplifies and Beautifies Any Set

UNITUNEModel 2C

This basic instru-ment consists oftwo BRUNO. 0 0 0 5 m f dstraight - line fre-quency condens-ers mounted on

1,1

an aluminumframe, a bronzepanel plate and MODEL 2Ctwo drums, withscale. The condensers are electrically insulated from eachother. This unit is a handsome addition to any set. Price,complete, assembled, $11.00.

MODEL RF

UNITUNEMODEL TK

UNITUNEMODEL RF

Consists of the basic condenserframe, Model 2C, and two BrunoLOW LOSS RF transformers.This combination provides tworadio frequency stages and coversa wavelength of 200 to 550 meters.Price, complete, assembled, $17.00.

This model is similar to Model RFexcept that the right hand con-denser holds a standard BRUNOTHREE -CIRCUIT TUNER. Itis adaptable to a variety of circuits.Price, complete, assembled, $20.00.

Booth S-5, Radio Worlds Pail

Write for Booklet of Complete Bruno Line

Far better reception use instruments manufactured by

BRUNO RADIO CORPORATION40 Payntar Avenue

LONG ISLAND CITY, N. Y.

no

September 11, 1112.0 I: I) I 0 \V 0 I: I, 11

(7heffeart CircuitVICTOREDITmnsfod

NrmenVICTOREE-Nan

MasterControl

UnitVictoreen Na. 170 R. F. Transformer-neat and compact -3" in diameter, 1"thick.

VictoreenR. F.

Transformersare made with air core construction. They are not merely"matched" but are actually tuned to a guaranteed precisionof 1/3 of 1%.Victoreen Super sets are free from oscillations, howls orsqueals-no matching of tubes is necessary.The B battery consumption is exceptionally low-S to 10milliamps with potentiometer at negative side-less thansome 3 tube sets.For range, elaritx, volume, selectivity and ease of operation,a Victoreen Super can not be excelled.

The Heart of the Circuit4 Victoreen No. 170 R. F. Transformers, each 57.00

(No. 171 Transformers when dry cells are used)1 Victoreen No. 150 Coupling Unit, each 5.50Should the use of aerial be preferred to loop, Victoreen No. 160 antenna coupler

is required, each 3.501 400 -ohm Victoreen Potentiometer 1.502 6 -ohm Victoreen Rheostats, each 1.202 30 -ohm Victoreen Rheostats, each 1.201 type V. S. Master Control Unit 19.50

Get a complete list of necessary parts from your deafer or write us direct. Your dealerwill be able to supply all parts. The free Victoreen folder and hook-up answers allquestions about the Victoreen circuit.

011111kall -if)

\ '

lv(

Victoreen Manganin Rheostats

ellicient-no matter how war nt the Unit bcCOITIC4the resistance remains absolutely constant.Victoreen Rheostats have double the number ofturns of wire used on ordinary Rheostats-thatmeans twice as fine adjustment.

Manganin wire used in all VictoreenRheostats.This three terminal Rheostat simplifies wiring.Made with 5 resistances -2, 6, 10, 20, 30 Q h

20

Victoreen Potentiometers200 and 400 nlmi re,istanecs 51.50 each.

I

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Victoreen Master Control UnitA i:ortipktely aisernl,led convenient arigl.- control,

unit for use M any circuit employing two, three orfour condensers.

Easy to mount and can tie used on any layoutwithout changing the wiring. Standard unit has twocondensers. one or two more can lit added, or itcan be rearranged by the fan to suit his requirements.

Simplifies tuning-stations can be logged to one dialsetting, whether loop or aerial is used.

(Snit as shown:For Victoreen Super or arty 2v.ny4 cr,rulen,,,

Extra condensercondenser ready to 1.11'

The George W. Walker Co.6528 Carnegie Avenue, Dept. B Cleveland, Ohio

Suite 961-50 Church St.,New York City.90 Abbotsford Rd.,Brookline (Boston). Mass.919 Raymond St.,Philadelphia, Pa.133 Riverview Ave.,Pittsburgh, Pa.8550 Dumberton Road,Detroit, Mich.710 Union Central Life Bldg.,Cincinnati, Ohio.

BRANCH808 Guaranty Bldg.,Indianapolis, Ind.P. 0. Box 551,Nashville, Tenn.Whitney Central Bldg.,New Orleans, La.2006,A Commerce St.,Dallas, Texas.1020 Main St.,Little Rock, Ark.5553 Vernon Ave.,St. Louis, Mo.

OFFICES:308 East 17th St.,Kansas City, Mo.508 So. Dearborn St.,Chicago, Ill.421 East Avenue, North,Waukesha, Wisconsin.P. 0. Box 66,Rode Island, Ill.409 N. Y. Life Bldg.,Minneapolis, Minn.2,12 Sugar Talv

P. 0. Box 321,Boise, Idaho.383 Brannan St.,San Francisco, Calif.443 So. San Pedro St.,Los Angeles, Calif.Room 911, Terminal Sales Bldg.,Seattle, Wash.421 East Ave.. N.,Waukesha, Wis.(15 East Fir.: C,:th St.,,-.It La!,

r "r

SHOW NUMBER

Vol. 1XNo. 25

Whole No. 233

SEPTEMBER 11, 192615c Per Copy. $1.00 a Year

AD I 0REG. U PAT. OFF..

A weekly Paper Published by Hen-nessy Radio Publications Corporatiesfrom Publication Office, 145 W. 45th

Street, N. Y., N. Y.Phones: BRYant 0558 and 1155s.

[Entered as second-class matter, March, 1922, at the post office at New York, N. Y., under Act of March 3. 1879)

The Beacon-3 Tubes;Panel Lights Featured

An efficient 3 -tube receiver.tube is kept

AFT2

I

0 B-/-FIMP

0 84-01T<O o8-B-

07-FIG. 1

The detector plate voltage is normally 45, while the B plus amplifier voltage is 135. The firstfrom over -oscillation by a slight negative bias. Usually IV2 volts are enough.

Excellent Parts Used to Produce a Receiver ThatAnswers Demand for Selectivity, Sensitivity and Vol-ume, Though 3 -Volt Tubes Are Used-Reflex Prin-cipal Invoked.

By James H. CarrollWHAT can be done on three tubes?

Quite a lot. And if parts of ex-cellent manufacture are chosen, not onlywill electrical efficiency rule, but the re-ceiver will have a professional appear-ance of the highest order. Such a set isthe Beacon, so-called because of the finepanel illumination afforded. The tuningadjusters are the new Mar -co illuminatedcontrols, among the handsomest offeringsin radio today. Suitable mounting andwiring directions will be found in theMar -co boxes. The only other memberof the front panel family is the newBruno ruby light switch, LS, which shineswith a fascinating red to tell you that theset is on, and to eliminate danger of leav-ing the radio tubes lighted when you goto bed, even though the switches on theMar -co controls are "off."

The circuit diagram, Fig. 1, shows thatthe receiver is a reflex. The principle issuccessfully employed because the set is

balanced, thus preventing self -oscillationat audio or radio frequencies, and suffi-cient selectivity is obtained, althoughthere are only two tuned stages, due tothe low -loss design of the coils and var-iable condensers.

Double Function ChokeThe choke coil CH, serves a double

function. It helps prevent the flow ofradio frequency current through the sec-ondary of the first audio frequency trans-former, an imperative precaution, and ithelps to balance out any existing tenden-cies toward self -oscillation. The variableleak R4 aids this stabilization which isrendered complete through the utilizationof a small negative bias on the grid oftube 1, the reflexed bulb. Negative biashas a damping effect on the radio fre--quencies, hence must be indulged insparingly in this branch of the circuit.Considering the B plus amplifier voltageas 135, the bias on the first tube, wherethe C battery is shown at lower left inFig. 1, should be about 1 1-2 volts, and

this bias may be well supplied from asmall flashlight cell. (No. 950 Evereadyunit cell for flashlights.)

A factor never to be ignored in theneutralization safeguards is the variablegrid leak, R4, which is the Verileak, thenewest variable grid leak on the marketand one of the most efficient of them all.While it is true that a set is more likelyto burst into over -oscillation due to thebehavior of the exclusively radio fre-quency channel, sometimes the detectoris the offender, or at least a contributingagency, and in that event the leakagepath of the excess negative electrons isfacilitated by lowering the value of theresistance of the Verileak. This is donesimply by turning the small knob of theVerileak, and once the proper setting isachieved there will be no need for chang-ing it, as the resistance value of the Veri-leak, at ally setting from its zero pointto its maximum, .10 megohms, will notvary more than 2 per cent, over a periodof months.

The DX MethodThere is one time, however, most oppor-

tune for determining the most effectivesetting, and that is when some far -dis-tant station is tuned in, and the signalis weak. By adjusting the Verileak knobthe signal can be brought up to maxi-mum strength, for it is well-known thatcorrect leak setting will add about 25per cent. to the volume, and when you

September 11, 1926 RADIO WORLD

Why It Is Better to HaLong Plate Than

Pointers on How to LocateSockets for Best Effect-iveness in Reflex Sets--RF Choke Coil AidsFixed Condenser to KeepRF Out of the Secondaryof the AF Transformer.

multiply that by the voltage gain in theaudio channel the total improvement isenormous. With the distant -station sys-tem of setting the leak you have solvedthe problem of highest detecting effi-ciency obtainable with your receiver.

A novelty incorporated in this receiveris the use of a choke coil outside the RFstage. As the set is made up particularlyfor the benefit of those who desire tooperate from dry cells, the 3 -volt .06 am-pere tube is used here, and of course the3 -volt .12 ampere tube is used in the lastaudio stage, tube 3 in Fig. 1. In the cir-cuit as tested in RADIO WORLD'S labor-atories the 3 -volt Ce-co power amplifyingtube was used in socket 3, with the 3 -volt.06 ampere Ce-co as the RF and detec-tor tubes.

Rebirth of Reflex

As a circuit the reflex lately has notbeen holding its own with the others,largely because of the drop in tube pricessince the reflex was at the height of itscareer. However, when demands for sim-plicity, economy and beauty are com-bined, and one desires a set that lives upto selectivity and sensitivity needs, not asqueal from the set no matter how lowa broadcast wavelength is tuned in, theanswer is the reflex, for with the numberof tubes limited to three, which was takenas an economical requisite, the specifiedend scarcely could be gained in any otherway. And the final result was most grat-ifying. Good parts were used and thesetook the distortion curse off the reflexas we knew it a couple of years ago-with high -ratio transformers then of poordesign adding to other troubles, heighenedby attempts to over -reflex.

The Beacon design utilizes only onereflexed stage, and the usual trouble

(Rain° Weida Staff Photo)

FIG. 3The three tubes are arranged in arow. At left are the choke coil andthe first audio transformer. TheAmperites are placed in front of the

respective tubes.

FIG. 2The front panel view, showing up the new Mar -Co illuminated controls. The flash-light type bulb behind the scale lights it up, so that the dial may be read. At top ofeach dial is a switch, so that the lights may be turned off, independent of the A

battery switch.

sources are absent, any novice being ableto make a success of this receiver, pro-viding, however, that the audio transform-er in the first stage is properly chosen asto its primary impedance. This is AFT1,lower left in Fig. 1, and it is a Samson2 -to -1 ratio transformer, a very efficientlymade instrument. The second stage trans-former, AFT2, is of the Samson 3 -to -1ratio model, of the same design as theother. With these transformers excellentquality of audio amplification is assured.

Theory of the SetThe circuit design is clearly drawn, so

that even a novice can follow it.As a guide it may be said that the ra-

dio signals circulate almost impartially inthe primary Li, and only the desiredwavelength is picked up by the first tube,through tuning the secondary L2 by thevariable condenser C1. The amplified radiosignal emerging from the plate of tube1, is built up around the primary L3 ofthe interstage coupler, and induced in thesecondary L4, whereby the signal, furtherselected against interference by the tun-ing of C2L4, is delivered to the grid ofthe detector tube, 2. In that tube theradio current, which is alternating, ischanged or recified to a form of directcurrent known as pulsating because thewave undulation does not go below thezero line. This is audio frequency cur-rent and it is fed into the primary of thefirst audio transformer, AFT1. It ispassed on to the secondary thereof anddelivered to the grid of tube 1 throughthe choke coil CH,-a new model of lowdistributed capacity-to the radio trans-former secondary L2, passed through thefirst tube and, by means of the primaryL3 of the other radio transformer, deliv-ered to the primary of the final audiotransformer. It is then deposited (but notfor long) in the secondary of AFT2 andthe grid of the last tube, 3, from whichtube the output is taken in familiar fash-ion,

One Reflex StageTherefore the first tube is the reflex

stage, because this is the one, and theonly one, that handles both radio andaudio frequencies, the audio ones being-slow (100 to 5,000 cycles), the others al-most incredibly fast, from say 1,500,000 to500.000 cycles per second.

The sequence of tubes is merely num-eral in Fig. 1, and does not represent therecommended order in actual construc-tion. It is preferable to have the reflexed

tube first, that is, at left, supposing youare facing the front panel, and to havethe detector tube 2 at extreme right, in-stead of between the two others. Themain reason is the reduced length of therotor of the tuning condenser C2 to thegrid condenser C3, which is at the gridpost of the detector tube socket. If youhad to bring the grid lead all the wayfrom a mid -located detector tube socketto the condenser C2 at the right-handpanel side, efficiency would hardly be sohigh. It is preferable to have a longplate lead, rather than a long grid wire,and this preference is carried into prac-tice when one locates the detector tubesocket at right and the final audio socketin center. Also it will be found the mostconvenient location for audio purposes,as well, since the tube at extreme leftis the first audio one, and what is moreacceptable than to have the next audiotube right beside it?

Small, Pretty SocketsThe sockets used in the original reciever

are suitable for the X base tubes par-ticularly, and of course the 3 -volt tubesmay be used, or the 5 -volt ones in sock-et's that have X bases. But for 5 -volttubes use two IA and one 112 Amperites.The sockets, like so many other items inthe excellent list of parts, are brand-new,being Louis Gerard Pacent's contributionto beauty and efficiency in socket design.'Mr. Pacent long has enjoyed an envi-able reputation as the designer of someof the most bewitching -looking radioparts, excellent for their efficiency as well,and in his new moulded Bakelite sockethe has hit upon another fetching attrac-tion.

The construction of the receiver isvery simple. Any one not familiar withreflex wiring should adopt the practice ofwiring the antenna coupler and its con-denser component to the first tube justas would be done in any other receiver,leaving the grid return wire not connect-ed from the stator of the condenser Cl.Likewise the interstage coupler L3L4should be wired conventionally as indeed itis, even diagrammatically but the B battery

lead is not connected. Then when youreach the plate of the detector tube, con-nect this to a pair of points (a) to oneside of the fixed condenser C5, and (b)to the P post of the audio frequencytransformer. Next take the choice coilCH, which is the neat little unit madeby the Precision Coil Co., and connect

(Continued on page 6)

6 RADIO WORLD September 11, 1926

How to Act DecentlyWith Regeneration

Operator of Receiver Must Avoid Sending OutSqueals, for They Annoy Neighbors-Rules

for Best Efficiency

By Leon L. AdelmanThe Chas. Freshman Co.

The principle of regeneration as usedin radio receiving sets, according to apopular definition, is that a part of theoutput of the detector tube feeds backinto its own input and thus greatly in-creases the volume of the signal. Weknow that regeneration can be accom-plished in several ways, by tickler feed-back, by the tuned plate method or byother capacitative feedback. Of thesevarious methods, the tickler feedbackcircuit is no doubt the more common.

It has been found that increasing re-generation' up to a certain point willgreatly increase the volume, sensitivityand selectivity of the receiver. This so-called point of maximum amplificationborders very closely upon what is knownas the oscillation point. Our next ques-tion is then, what is oscillation? It isthe creation of radio frequency currentscaused by allowing the set to over -regenerate.

Bad EffectsWhen a radio receiving set in a state

of oscillation is tuned to a broadcaststation, the following deleterious effectsensue:

It causes whistles in neighbors' radioreceiving sets tuned to the same or evensome other station. This interferencemay be heard up to a distance of severalmiles. Secondly, it distorts the quality ofyour own music. Thirdly, it may evencause howling and squealing sufficient tofrighten every timid folk in the house.

Many of you may have had the ex-perience of tuning in a station by meansof hair -breadth adjustment so as to cutout the squeals just either side of theproper setting. In fact, you may havehad to keep your hand on the dial for fearthat the noise would recur. This conditionis described as that of zero beat adjust-ment. When a radio receiving set in a

state of oscillation is exactly tuned to abroadcast station it is said to be in thestate of zero beat. This, however, dis-torts the broadcast reception and alsointerferes with neighboring receivingsets which are tuned to the san e station.In a word, regeneration carried to over -oscillation causes great annoyance toyour neighbors; poor reception, in dis-torted quality of reproduction and has noadvantages whatever. A radio receiverin an over -oscillatory condition is a mini-ature but powerful transmitter, and sincethe law requires that a license is neces-sary to own and operate a transmitter, itis virtually an infraction of the law toallow one's set to continue in a state ofover -oscillation.

How to Trace OriginThe interfering and annoying whistle

which you hear in your receiving set mayoriginate in your own set or it may beinterference caused by your neighbor.To determine this point you can make thefollowing test: Leave the regenerationcontrol m a fixed condition, slowly rotatethe tuning dial and note particularly thechange in sound of the whistle.whistle rises and lowers in pitch, simul-taneously with the movement of yourtuning dial, it indicates that your receiv-ing set is in a state of oscillation andprobably is causing interference to othersets. On the other hand, if the whistledoes not change in pitch corresponding toeach movement of your tuning dial, butsimply varies in volume, the whistle is notcaused by your receiving set but is inter-ference produced by some other over -oscillating receiving set in the neighbor-hood.

Many so-called non -radiating receiversunder certain conditions will radiate andso cause interference. Make it your busi-ness to see that your set is not causingtrouble. If you are in doubt as to whetheryour set can cause interference, you maycheck up by making the following test,but be careful to do so at a time when

only a few are listening in so as not tocause annoyance.

Call a neighbor on the telephone, andask him to listen in on a particular stationat a prearranged time and then tune yourown set to the same station. Turn upyour detector tube filament to normal andput the regeneration control to its maxi-mum. Slowly move your tuning dial fivetimes across the point corresponding tothe tuning of that station. Then tele-phone your neighbor and ask him if heheard the interference corresponding tothese five movements of the dial on yourreceiving set. If he heard your interfer-ence, the probability is that hundreds ofothers also have been annoyed. Youshould therefore learn how to operatewithout causing this interference.

If you will take the trouble to observethe rules which follow, you will obtaingreater satisfaction and enjoyment fromyour radio receiving set and at the sametime cause minimum annoyance to yourneighbors:

1Practice on tuning in powerful localstations and do not try to pick up

weak distant stations until you becomeexpert.

2Use both hands, one hand for the re-generation control, the other hand for

tuning.

3 Keep the regeneration control alwaysbelow the point of over -oscillation or

saturation. Your set is then in the mostsensitive condition. This is the reasonfor using your two hands for tuning. Youwill find that as you tune in the stationson the lower waves, it will become nec-essary to turn back the regeneration con-trol.

4 If your set then accidentally breaksinto oscillation, turn back the re-

generation control at once.5Do not try to find the station by the

whistle. If your set is tuned just be-low the whistling point, the signals willcome in clearly and the regeneration con-trol can then be turned a little furtherto increase the volume.

k../Do not force regeneration in an at-tempt to hear stations beyond the

range of your set, be content with thosethat you can really hear.

7Do not force regeneration in an at-tempt to obtain speaker volume from

a set not designed for the purpose. Thefact that you once heard a distant stationon your receiving set is no indication thatyou can hear this station regularly, foroccasionally, a radio broadcast from adistant station is received due to somefreak atmospheric condition. Repeatedlyto turn one's dials will result in prevent-ing some other broadcast. listener in tun-ing in that station on a more powerfulreceiving set.

THE . BEACON(Continued from page 5)

either end of it to the G post on thesecondary of the first' audio transformer,the AFT, which will be to the left inthe assembly.

Wiring HintsThe other terminal of the Precision

choke is joined to the stator plate of Cl.Now connect the end of L3 that ord-

inarily would go direct to B plus, insteadto the P post of the second audio trans-former, the B post of which goes to Bplus amplifier voltage. You will observethat two battery leads have not been com-pleted, and these are the grid return ofthe first tube and the B battery supplyto the detector tube. These two leads aresoldered when you are ready to bringyour set wiring to an end, with receiverleads soldered to lugs on the bracketedbattery terminal strip.

The final audio stage is -familiar to

LIST OF PARTS FOR THETwo Mar -co illuminated tuning controls.One Verileak variable grid leak, R4.Two Bruno .0005 mfd. straight line fre-

quency condensers, CI, C2.Two Bruno 99 RF transformers, LI L2,

L3 L4One Precision Coil Co. radio frequency

chock, CH.Three Pacent X sockets.One Samson 2 -to -I audio frequency

transformer, AFTI.One Samson 3 -to -I audio frequency

transformer, AFT2.One 120 Amperite.Two 4-v 199 Amperites.Three .00025 mfd. Tobe bypass condens-

ers, C4, C5, C6.One 7x20" baseboard..

nearly all who know anything about ra-dio, as is the filament wiring.

As the circuit is not critical on fila-ment heating, that is, does not dependon underheated filaments to prevent self -oscillation, Amperites are used through -

BEACON 3 -TUBE REFLEXOne .00025 mfd. Micamold fixed con-

denser, C3.One 7x2I" Diamond State Fibre Co.

Celeron panel.One Bruno light switch, LS.One bracketed battery and antenna -

ground terminal strip (H. & F. Labora-tories), consisting of four Eby bindingposts and one Carter short jack.

Accessories: Electrad antenna kit, Elec-trad lightning arrestor; five parallel -con-nected 4 1,'2. -volt Eveready No. 771 C bat-teries for use as A battery; one midget22 15 -volt B battery, for use as C battery,one 11z -volt flashlight cell, one cabinet,one speaker, three 45 -volt Eveready heavyduty B batteries, one phone plug.

out, these being of suitable carrying ca-pacity and resistance for the particulartubes. (Tube 3 equals 120 Amperite, 1and 2 equal 4v199 for the small tubes).[More about the Beacon set will be published

nest week]

September 11, 1926 RADIO WORLD 7

A NewEffect InCondensers

COlfriCS3, General In It Corp.)

FIG. 1HOW semi -circular plates are used for the rotor, while the stator plates are cutaway, to afford straight line tuning, on the basis of dial divisions, rather than

straight line capacity, wavelength or frequency.

Manufacturers Turning to Models That Rntroduce theStr ight Line in the Dial Variation, Rather Than Ex-clusively in the Capacity, Wavelength or FrequencyScale Virtues o4 All Three Combined in Composite

By Wm. M. HendersonTHE tuning problem has brought the

tuning condenser very much intothe limelight during the past two years.The prevalent use of this instrument totune the circuits in a radio receiving sethas placed upon this device the problemof solving the tuning difficulties.

With the great number of broadcastingstations crowded within too small a fre-quency band it is only natural that ap-paratus designed in the days beforebroadcasting should cause inconveniencein tuning. Two years ago, when thestraight line capacity condenser was ingeneral use, stations below 400 meterswere jammed together on the dial.

That this should occur was only nat-ural, considering the laws governing tun-ing circuit operation. This jamming ofshort wave stations gave rise to two dif-ficulties : first, poor dial visibility; second,poor access to selectivity.

Visibility DefinedDial visibility means actually the num-

ber of dial divisions between station set-tings. The greater the separation betweenstations on a dial the greater the dialvisibility and consequently the greater theease of tuning.

Poor access to selectivity, with theSLC condenser, was due to the almostimpossibility of hitting a station on thedot, because of the slight dial variationnecessary to bring in another station orcut out the one desired. In other words,the stations were so close to one anotherthat physical difficulty attended separat-ing one from another, even though theselectivity factor was electrically pres-ent just the same.

The first step taken toward a remedywas the design of a straight line wave-length condenser. This instrument wasmade with the rotor plates cut away atone end so that the capacity variation,with the respect to the SLC condenser,was slower at the lower end of the broad-cast band. The result was to lessen slight-ly the tuning difficulty on the short waves,give excellent separation of stations op-erating in the middle band and crowdthe upper wavelength stations.

As the SLW instrument did not fill thebill entirely, another design was broughtout-the straight line frequency condens-

er. This was given quite a reception, be-cause it afforded an even frequency var-iation for equal dial separation.

The instrument afforded perfect dialvisibility on the lower waves but broughtthe high wave stations closer togetheron the dial.

This year has +brought forth straightline tuning instruments.

These new condensers have a tuningcharacteristic that is a combination ofthe best qualities of the three formertypes. The stator plate section of thenew models is specially shaped insteadof the rotor plate, and SLF tuning is ob-tained from 0 to 50, on a 100 decimal dial,SLW tuning from 50 to 80 and SLC tun-ing from 80 to 100.

This tuning characteristic gives thestraight line frequency condenser's sta-tion separation on the short waves, themiddle wave separation of the straightline wavelength condenser and the highwave station separation of the straightline capacity instrument. At no pointon the dial are stations crowded.

A good idea of the turfing charactercan be obtained from the table. Thiswas compiled from laboratory data ob-tained with condensers having the samecapacity values and using the same coil.

What Table ShowsIn this table are given wavelength and

frequency points of resonance with thewavelength and frequency separation be-tween these points. Then in the first col-umn is the separation afforded by the

Poor IPial Visibility andAwkward Access to Se-lectivity Avoided in UnitThat Rs SL Frequency,Wavelength and Capac-ity By Turn.

straight line capacity condenser over thisband.

In the second column is a list givingthe dial division separation afforded bythe straight line wavelength condenserand then in the third the separation ofthe straight line frequency instrument.A comparison shows where each familiartype excels in one portion of the broad-cast band (in bold type). The last columnshows how the features of each of theother types are incorporated in the newstraight line tuning condensers. At noportion of the band are the new modelsmore than one division of a dial poorerthan that afforded in that section by thetype it emulates.

The rotor plates are supported in threeplaces and the stator plates in four places.This gives rigidity to the combinationtuning instrument, known as Metralign.

WGY Schedules TestOf TwTransmitters

Propagation tests on two of its threetransmitters will be continued by WGY,of Schenectady, on successive Saturdaynights, September 11 and September 18.on 379.5 meters. Engineers of the Gen-eral Electric Company are endeavoringto give radio listeners the very best poss-ible transheission service and to do thisthe cooperation of listeners in all partsof the country is necessary.

The transmitters used will be known asNo. 2 and No. 3. No. 2 will be used until9:30 p. m. E. S. T,, at which time. No. 3transmitter will be operated for a halfhour period. At 10:00, No. 2 will be putin commission until 10:30, when No. 3will go on the air for a period of a halfhour.

Observers will be placed in about fortyspecial locations and it is expected thatwith these reports and the large numberexpected from other listeners the engin-eers will have valuable data from whichto draw their conclusions. The listenersare asked to compare the signal strengthof the two receivers and to give theiropinion of the relative reliability of theoutput. Listeners are also asked to indi-cate their preference.

STATIONSWave

Call Length FrequencyLetters Meters Kilocycles

WNYC 526 570WEAF 492 610WJZ 455 660WOR 405 740WHN 360 833WGBS 316 950WFBH 273 1100WGCB 252 1190WI 240 1250WNJ 233 1290WIBI 218 1375

DIFFERENCES IN DIAL DEGREESBetween Stations

Using Various Type Condensers

DifferencesBetween Stations

In InMeters kc S.L.C. S.L.W. S.L.F. S.L.T.

3437504544432112

715

40508093

11715090604085

11 51/21110

81/2 1111 12

7 104 6211% 2541% 2

6 9385 91/2

8 10328 12

10 11;(212 11

.6., 7164 31/2

338 3384 334

8 RADIO 'WORLD September 11, 1926

The 1927 Model VictoreenDesignedWith Power Unit

pratice and lucid descriptive powers havewon him an international reputation-Arthur H. Lynch Creates Arthur H. Lynch. Options Are Presented, SoIn casting about for the receiver whichNew- Plane of Efficiency would satisfy the most capricious and That Batteries May Bediscriminating experimenter Mr. Lynch Used, If Preferred, or BIn Set and Shows How It has chosen the well -established and fully

May Be Operated With proven variety of Super -Heterodyne. His Battery and T r i c k 1 ereasons for doing so are many. It isLynch Power Amplifier simple to build, simple to operate, can be Charger, or B Eliminatorand B Supply and Elim- used with either loop or small antenna-

of all the circuits now known to radio With Any A Source-Anandinating All Batteries- it is the one least understood. It is pos- Efficient A Eliminatorsible, by following Mr. Lynch's clear-cutThree Stage Resistance directions, to build a receiver which is for Filament Heating IsAudio Employed, But extremely satisfactory, and one in which Developed.the real experimenter will find plenty ofAny AF Channel May opportunity for research.The author has made a number of very

a minimum_of parasitic stray fields, to sayBe Used, significant improvements in the design ofnothing of greatly simplified wiring.the receiver and suggests many logical

The receiver itself is made with but six---- ways for improving on his own work.tubes-ending at the second detector. ItRadio authorities, who have heard the re -may be operated on batteries or with cur -By Herman Bernard ceiver in operation in the author's home,rent supply devices now on the market.Associate, Institute of Radio Engineers proclaim it to be a very wonderful job.It may be used with any type of audioThough it naturally pleases him to haveamplifier and the author has provided forTHROUGH the combined efforts of his design so favorably commented upon,both straight and sloping panel assembly1. some of radio's leading engineering it has not gone to his head and he merelyso that the home constructor may havebrains RADIO WORLD is enabled to offer says that it is but the beginning of whathis choice. In either case the receiverits readers a series of articles such as may well be some serious work on theitself may be placed in a standard 8x22"has never been surpassed in interest or part of those engineers and experimenterscabinet, while the amplifier and batteriesimportance in any radio periodical. There who will never be satisfied until radioor other source of current supply may beare to be five such articles, including reproduction as a whole .is truly perfect.placed in a suitable console and, such isthis, the first one, which is merely a sum- It is good, now-very good, in fact-butnow available on the market in almost anymary of what is to follow each week for not perfect.

-

desired style. There are but five leads fromthe next four weeks. The author has taken the fundamentalthe console to the receiver and they in -

A brief summary of these revolution- Super -Heterodyne circuit first brought todude the two output leads which go toary articles includes the following im- light here by Armstrong and later adoptedthe imput of the audio amplifier.portant new developments: as the foundation of many magazine and

-I A newly designed 6 -tube Super- newspaper articles, to say nothing of Surpasses Expectations. I. Heterodyne which may be operated papers read by notable engineers before This receiver has been made with manyeither from batteries or direct from the some of the greatest scientific societies important elements in mind and the result60 -cycle line current, without any bat- in this country and abroad. He has se- is all and more than most of us have ex-teries. lected, for use in his models-and there pected. Mr. Lynch has remembered that2A complete article describing the have been quite a number, as his work all radio experimenters are not millionaires theory, building and operating of the has been going on for a protracted and has chosen the elements which gonew power amplifier and B supply unit period-a group of equipment which any into his receiver with this important factdesigned by Arthur H. Lynch. This experimenter can duplicate in nearly any constantly in mind. He has also givenarticle will include complete information section of this country and in many consideration to the fact that some other -for using this wonderful improvement in foreign countries. wise perfectly satisfactory units do notradio reproducing devices with the new Chose the Victoreen enjoy very wide distribution and hasSuper -Heterodyne as well as with other chosen a group which may be picked uptypes of receivers. The foundation for Mr. Lynch's Super in a hurry at Cross Roads, KalamazooQ The third article will be a well- is found in the popular and satisfactory and Oshkosh, as well as in San Fran -0 illustrated description of the first line of Victoreen units which were so cisco, Chicago, New York or any of ourtwo articles combined with novel means popular last year. The other units are other large cities.of using apparatus now on the market all standard, also, except the tubes-but In designing the resistance -coupledfor operating direct from the light socket. the author has taken the precaution to power amplifier which bears his name Mr.4The concluding article of this series include the necessary technical data for Lynch had made another very important will deal with effective means 'of standard tubes as well. contribution to the radio art. It is cap -operating directly from the lamp socket In order to have the receiver function able of passing and amplifying speech andwithout any batteries whatever and will at its best, a special arrangement of tubes music with remarkable fidelity. It is de -also include many suggestions for console is suggested and these include vacuum signed for use with any of the units nowand high -boy assemblies so that this re- tubes having a high amplification constanton the market for the Raytheon tube andceiver de luxe may have a suitable hous- for use in the intermediate frequency addition to being an amplifier itself iting which will blend well with the most amplifier, two special detector tubes which provides the necessary B voltage for theexquisite living -room setting. This article tests have provers to be highly sensitive, receiver with which it is used. It is thusalso will include complete instructions for and a conventional tube for use in the an audio amplifier and an eliminator.building an A battery current supply oscillator.

which will function directly from the AC The overall amplification is therefore Generally Usefulhouse line. And what is of even more very high and the receiver is both sensi- Many radio experts and even someimportance to the home builder and tive and very selective. radio companies gave up the problem ofmore notable as a real advance in the The plate voltage for each of the tubes using a resistance coupled amplifier withradio art-there will be a complete in the receiver is passed through a fixed the Super -Heterodyne. Many othersdescription of the technical details and resistor shunted by a condenser after claimed that resistance coupling with a Bconstruction helps for the building of an the fashion described by Mr. Lynch in supply unit was out of the question. Mr.A current supply which will operate connection with his now -famous Improved Lynch solved both problems and hisdirectly from the light socket. Browning Drake. By this method the power amplifier and B supply is just aboutThe New Super -Heterodyne author provides any desired plate voltage as neat a piece of electrical and mechanicalfor any one tube from a single plate design as we have ever seen. It embodiesAll four succeeding features will come voltage source and accomplishes two very so many features that space does not per -from the pen of that veteran designer desirable results, namely: greatly ins- mit us to tell about them all here. It will(Concluded' on page 28)

whose sensible application of theory to proved performance and the reduction to4

September 11, 1926 RADIO W OR LD

Arthur H. Lynch's SetIn a Console In His Home

FIG. 1The 6 -tube Victoreen Super -Heterodyne in a console that houses also the A and B eliminators.

RADIO WORLD< 11 102v.

For the Novice

i0

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5

FIGS. 1, 2, 3 AND 4.These illustrate, top to bottom,effects of resistance, inductance and

capacity.

inductance

The Opposing Effect of Re-sistance, Inductance and

Capacity

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September 11, 1926 RADIO WORLD 11

The Na-ald Truphonic Set

(Radio World Staff Photos)

The front panel view is at left.

Extreme CompactnessAchieved in ReceiverThat Utilizes LocalizedControl Unit, Double Im-pedance Audio Amplifier,Gang Socket Strip andShielded Coils.

By Hum bolt BrillASKILLFULLY designed 6 -tube re-

ceiver possessing the ideal radio fanqualifications, such as simplicity of control,great volume, but with exact tonal true--ness; selectivity, distance, yet no unrulysqueals due to interaction of the fieldsof the coils, is shown photographically inFigs. 1, 2 and 3 and schematically in Fig.4. The first two tubes act as radio fre-quency amplifiers, the next one as a non -regenerative detector and the concludingthree as AF amplifiers.

A newly developed system of audiofrequency amplification is employed,known as the double impedance system.The complete theoretical and practicaldiscussion of this system will be givenin the next issue of RADIO WORLD by A.N. Clifton.

Set Is Alden DesignThe receiver shown on this page was

designed by engineers of the Alden Manu-facturing Company. The Na-ald L6calizedControl is the means of manipulating the.000375 variable condensers, while theNa-ald Truphonic amplifier --unit, includingchoke, constitutes the audio channel.Another Alden product is the gang socketstrip.

The RF and detector part of the circuitis the familiar efficient one. A point ofinterest is the use of the Sickles shielded

FIGS. 1, 2 AND 3.The other photos show the bottom and the rear views.

coil, a new product. The diamond weavevariety of coil affords shielding withoutloss of compactness, for obviously the setis very compact.

The filaments of the two RF tubes arecontrolled by a 10 -ohm Carter rheostat,while the filaments of the detector andthe three AF tubes are controlled by a3 -ohm Carter rheostat. C11 and C8 areboth bypass condensers and have a capac-ity of about .1. C4 is the grid condenser.00025 mfd. The grid leak R10 is of the2 or 3-megohm type. It will be notedthat there are two possible ways to con-nect this leak, either in shunt to thegrid condenser or in shunt to the gridand filament plus. This depends uponthe type of tube used. The -01A re-quires a positive grid return for detec-tion, while the -00A requires a minusgrid return.

May Use Power TubeProvision is made in the last stage for

the use of a power tube with the properC bias. A choke coil and condenser tokeep the DC off the speaker -windingsare in the audio unit.

The complete set can be constructedin a 14" long sloping model cabinet, 6%2"high. The localized control is mountedin the center, with the condensers in theirrespective places. Underneath the con-densers the coils are mounted.

The special unit containing the Tru-phonic AF Amplifier and the sockets isplaced in the rear and supported by abracket.

The rheostats are mounted on a verticalauxiliary panel.

The antenna and ground posts aremounted on a strip and bolted to theend of the unit casing. The phone tipjacks are also mounted here. The bat-tery leads are made through a taggedcable.

The wiring of this set is very simple,most of it having already been made inthe unit. Flexible wire is used. Thesockets in the unit will hold any UX typetube, also the old style base 01A tubes.

Ease of tuning is assured. The tone

6 -Tube Creation AffordsSimplicity in Tuning andAssures Excellent ToneQuality, As the AudioGrids Do Not Overloadon Strong Signals.

quality is wonderful, due to the freedomfrom grid blocking on strong signals onthe audio amplifier. Selectivity is good.The set is a marvel in compact construc-tion.

Two Naval Vessels toSend Weather Maps

WASHINGTON.Testing of radio transmission of

weather maps is being undertaken by theNaval Experimental station at Bellevueunder the Jenkins picture transmissionsystem. Receivers have been furnishedtwo naval vessels and it is expected thatthe installation will be ready for servicetests early in September.

Officials are reluctant to comment onthe possible outcome of the tests, but itis admitted that if they are successful itmay revolutionize the dissemination ofweather information. Quicker and moreaccurate weather reports to the generalpublic is said to be one of the possibilitiesif success is attained.

NAVY TO BROADCASTWASHINGTON.

Arrangements are being made by theNavy Department for the broadcasting ofprograms through two chain stations anda number of local stations throughout thecountry, according to an announcement.Commandants of all Naval Districts havebeen notified to assist.

FIG. 4.The circuit diagram of the compact 6 -tube receiver, using a localized tuning control, shielded coils and three stages ofdouble impedance coupled audio.

12 RADIO WORLD September 11, 1926

Radio Universityti

AFREE Question and Ans-wer Department con-

ducted by RADIO WORLDfor its yearly subscribersonly, by its staff of Experts.Address Radio University,RADIO WORLD, 145 West45th St., N. Y. City.

When writing for information give your Radio University subscription number.

FIG. 423The circuit diagram of the 3 -tube reflex, desired by James Klein.

PLEASE PUBLISH the circuit diagramof a 3 -tube receiver, using a non -regen-erative RF amplifier, a regenerative de-tector and a stage of transformer coupledAF amplification. The RF amplifiershould be connected up so that it willact as a AF amplifier also. (2)-I havea single circuit, closed type jack, a tunedRF coupler and a 3 -circuit tuner. Theprimaries of both the tuner and the RFTconsist of 10 turns, while the secondar-ies consist of 45 turns. Each primary andsecondary is wound on a tubing 3%" indiameter, with No. 22 double cotton cov-ered wire. The tickler is wound on atubing 13/4" in diameter and consists of36 turns, using No. 36 single silk coveredwire. Can these be used? (3)-Whatother parts will be necessary? - JamesKlein, Ferndale, N. Y.

(1)-The diagram of such a receiver isshown in Fig. 423. (2)-Yes. (3)-Youwill need two .0005 mfd. variable condens-ers, a high (6 to 1) and a low ratio (3 to1) audio frequency transformer, a 10ohm and a 20 ohm rheostat, a .00025 mfd.grid condenser, a 2 megohm grid leak, a.001 mfd. fixed condenser C4, tubes, etc.The variable condensers shunt the sec-ondaries of the RFT and the tuner. Thehigh ratio AFT (AFT 2) is used in theamplifier stage, while the low ratio AFT(AFT 1) is used in the reflex stage. The10 ohm rheostat controls the filaments ofthe RF-AF and the AF tubes, while the20 ohm rheostat controls the filament ofthe detector tube. The single circuit,closed jack is used at the RF-AF output.Phone tip jacks PTJ, are used in theoutput of the last tube. C4 is a by passcandenser. Use the O1A type tubesthroughout, with a 6 volt A battery forfilament supply. The plates of the ampli-fier tubes receive about 6754 to 90 volts,while the plate of the detector tube shouldreceive about 45. volts. These voltagesarc purely experimental, they dependingwholly upon the individual characteristicsof the tubes. Care should be exercised,when connecting up the grid returns. Thereturns of the amplifier tubes are madeto the F minus, while the detector returnis brought to the F plus.

* * *

I WOULD like to build a 4 -tube re-ceiver, employing two stages of tunedradio frequency amplification, a non -re-generative detector and one stage oftransformer coupled audio frequency am-plification. The first RF tube should actas an AF tube. The circuit diagram ofsuch -a receiver, employing any special

coils, condenser, etc., but with no tubeadditions, so as to obtain loud signals, willbe appreciated. Give circuit data.-Wil-liam Buckley, East Wyndham, N. Y.

Fig. 424 shows the electrical diagram ofthis receiver. You will note that a tunedantenna and a single winding antennainductance is used. These additions willgive you tremendous volume. This con-tinuous winding consists of 50 turns,tapped at the 8th turn from the beginningand wound on a tubing 31/1," in diameter,using No. 22 double cotton covered wire.The primaries of the RFT, L2 and L4,consist of 8 turns. The secondaries, L3and L5, consist of 45 turns. Each pri-mary and secondary is wound on a tub-ing 3.4" in diameter. No. 22 dcc wire isused. The 42 turn portion of the continu-ous winding and the secondaries of theRFT are each tuned by .0005 mfd. vari-able condensers, Cl, C2, C3. The fila-ments of the RF-AF and the detectortubes are each controlled by 20 ohm rhe-ostats, while the filaments of the RF andthe AF tubes are controlled by ballastresistors. These should be of the 1/4 am-pere type. The coil in the antenna tunedsystem consists of 31 turns of No. 24 dccwire, wound on a tubing 3" in diameter.A .001 mfd. variable condenser shunts thiswinding. The first audio frequency trans-former is of the low ratio type (3 to 1),while the transformer in the AF stage isof the high ratio type (6 to 1). The platesof the amplifier tubes receive 90 volts,while the plate of the detector tube re -

s

0

FIG. 423aThe filament wiring of a 3 -tube set.

ceives 45 volts. Provision is made for theinsertion of a C battery. A- separate Bvoltage may be applied to the plate of thelast AF tube, by breaking the lead fromthe bottom of the jack and running it toanother bin -ling post. A filament switch,inserted in the A plus lead, is required,there being no other means of cutting inor out the filament power to the RF andthe AF tubes.

*

PLEASE show the wiring of the fila-ment of a 3 -tube set rising -01A tubesand two rheostats.-A. J. Willow, Spokane,Wash.

Fig. 423a shows this. The rheostat atleft is 20 ohms and the other is 10 or 15ohms.

* * *

PLEASE GIVE the circuit diagram ofthe receiver, described in the Radio Uni-versity columns of the August 21 issue ofRadio World, wherein a triple condenserwas employed. Include the resistance AFstages in the diagram. Give the constantsof all the parts.-Carl Stintion, Mt. Ver-non, N. Y.

Fig. 425 shows the electrical diagram ofthis receiver. LI, L3, L5 and L7 representthe primary windings, while L2, L4, L6 andL8 represent the secondary windings ofthe radio frequency transformers.

Cl is the single .0005 mfd. variable con-denser, used to tune the secondary of theantenna RFT. C2 is the triple condenser,with its common rotor and three station-ary sections. R1 is a 20 ohm rheostat.R2 is the 10 ohm rheostat. R3 is another20 ohm rheostat. R11 is a Y2 ampereballast resistor, used to control the fila-ment temperature of the first two audiotubes. The filament of the last AF tube iscontrolled by a single ballast resistor. Thisprovides flexibility in case you wish touse a power tube. A special C batteryconnection is also provided for. R5, R7 andR9 are all .1 megohm fixed resistors. R6is a 1 megohm grid resistor. R8 is a .5megohm grid resistor, while R10 is a .25megohm grid resistor. C5, C6 and C7 areall .25 mfd. fixed stopping condensers. C4is the .00025 mfd. grid condenser. R4 is

100

ox,.Os

-

FIG. 424The circuit diagram of the 4 -tube receiver, requested by William Buckley.

September 11, 1926 NADT0 \V0 k 1_D 13

C /

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03

04

RS Re

IIL

0,,

FIG. 425The circuit diagram of the 7 -tube, 2 -control receiver.

the variable grid leak. C3 is the .001 mfd.fixed condenser used for bypassing. Bplus 1 equals about 671,/i volts. B plus 2equals about 45 volts. B plus 3 equalsabout 90 volts. B plus 4 equals about 135volts. These voltages are for the -01Atubes. Hi -mu tubes may be used in thefirst two AF stages and a lo -mu tube inthe last AF stage. In this case highervoltages will have to be employed. Thecorrect voltages should be obtained fromthe cartons or the circulars placed withthese tubes. This applies to the C voltageof the last AF tube.

* * *

I HAVE a variocoupler, having a 20turn rotor (2 inch diameter) and a 50 turnstator (4 inch diameter). No. 22 dccwire is used. A circuit diagram of a 2 -tube receiver, using a tuned RF amplifier,and a regenerative detector, with thiscoupler in the detector stage, will be ap-preciated.-Carl Mertens, West NewYork, N. J.

Fig. 426 shows the electrical diagram ofthis set. A single winding antenna induc-tance is used, shunted by a .0005 mfd. va-riable condenser. This coil consists of 50turns wound on a tubing 3% inches in di-ameter, using No. 22 double cotton cov-ered wire. A tap is made at the eighthturn from the beginning. This tap is con-nected to the antenna, while the begin-ning of the coil is brought to the ground.The ending of this coil is brought to thegrid post on the RF socket. Use thestationary coil for the plate winding ofthe RF tube and the rotary winding forthe plate winding of the detector tube.That is, use this latter winding as atickler. Rheostats of the 20 ohm typeshould be used to control the filamentsof both tubes. A .00025 mfd. grid con-denser and a 3 megohm grid leak is used.A single circuit jack is used at the out-put. Although the plates of both tubesare connected to one B plus terminal inthe diagram, better results will be ob-tained, if a separate voltage is applied toeach of the plates, e.g., 45 to the detec-tor and 90 to the amplifier. This set isdifficult to control. All adjustmentsshould therefore be made with care. Forloudest signals use the -01A.

* * *

I HAVE two 50 turn honeycomb coils.Could I have the circuit diagram of a4 -tube receiver, in which these two coilscan be used ?-Melvin Kratzner, JerseyCity, N. J.

Fig. 427 shows the circuit diagram ofthis set. The impedance method of coupl-ing is used. A .0005 mfd. variable con-denser is used to tune the antenna andone is used to tuned the plate coil. Theantenna coil may be tapped as per dia-gram, at every second turn, or it may bea single winding without any taps. Eachrheostat is of the 10 ohm type. The rhe-ostats in the filament circuits of the AFtubes are not necessary. Ballast resistors

0LI

Ti

FIG. 426A 2 -tube regenerative receiver requested by Carl Mertens.

<2*

0

0,3 -*1

OR

FIG. 927The circuit diagram of a 4 -tube impedance coupled receiver.

may be substituted. A .00025 mfd. gridcondenser and a 3 megohm grid leak isused. The leak is not shunted to the gridcondenser, but connected from the grid tothe F plus terminal on the detector socket.The first AFT should be of the low ratiotype (3 to 1), while the second AFTshould be of the high ratio type (6 to 1).These positions may be reversed. A doublecircuit jack is placed at the first AF out-put and either a single circuit jack, open,or a pair of phone tip jacks may be placedat the last AF output. The plates of theamplifier tubes receive one voltage, e.g.,67/, while the plate of the detector tubereceives about 45 volts. The -01A tubesshould be used for best results, with a6 -volt A battery source. If no rheostatis used in the filament circuits of the AFtubes, either a filament switch or a fila-ment control jack will be necessary.

0,

COULD YOU favor me with the cir-cuit diagram of a 1 -tube receiver, em-ploying a regenerative RF tube reflexedand acting also as an AF tube and acrystal detector? The coil data wouldbe appreciated.-Martin Humboldt, Waco,Texas.

Fig. 428 shows the circuit diagram ofthis receiver. A 3 -circuit tuner is usedin the RF stage. A standard RFT isused for coupling. The primaries ofboth the tuner and RFT consist of 10turns. The secondaries of these unitsconsist of 45 turns. Each primary andsecondary is wound on tubings 314"in diameter, using No. 22 double cottoncovered wire. The spacing between thetwo windings is experimental. The sec-ondaries of the tuner and the RFT areshunted by .0005 mfd. variable con -

(Concluded on page 14)

14 RADIO WORLD September 11, 1926

Realism in StudioIs Tax on ingenuity

Godfrey Ludlow Tries 57 Varieties of Bells to SimulateLocomotive's But Has to Get Real One

from Train

"While it is possible to fool the humanear, it is folly to attempt to trick themicrophone," is the expert opinion ofGodfrey Ludlow, who has charge of allacoustical effects in the studio of WJZ.When asked to give his reasons for thisopinion, Ludlow cited the case of theblind.

"Everyone knows," said Ludlow, "thatthe hearing of a blind person is moreacute than that of a person with clearvision. Nature attempts to equalize thesenses and if one sense is lacking, theothers are made more acute. The humanbrain, bereft of one of its sources of sense,depends more upon the remaining, with

the result that with more use, thesesenses become more delicate and lesslikely to be fooled.

Depends on Ear Only"This explains why the microphone is

more sensitive than the human ear. Asfar as the action in the studio is con-cerned, the entire radio audience is blind.They rely upon the sense of hearing aloneto convey the action which takes place inthe studio to their mind. Therefore, ifthat sound is not absolutely accurate, themind catches the deception and the effectis lost.

"Here is an example. Suppose you went

THE RADIO(Concluded front page 13)

densers. The tickler consists of 36turns, wound on a tubing 1g" indiameter. A low ratio AFT should beused. C3, C4, C5 and C6 may all be .001mfd. fixed condensers. A rheostat con-trols the filament temperature of the RF

L. 3

4110

411.

411.

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G3(000 0 F-8

10

UNIVERSITYamplifier. CD is the crystal detector.At the X point, a radio frequency chokecoil may be inserted This will tend toprevent the RF current from enteringinto the AF circuit. The -01A tubeshould be used. The crystal detectorshould 'be of the fixed type.

0,0046,C)Z. 5 C

C5

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FIG. 428The electrical diagram of the 1 -tube reflex using a crystal as a detector.

Join RADIO WORLD'S University ClubAnd Get Free Question and Answer Service for the Coming 52 Weeks.

This Service for Yearly Subscribers ONLYHave your name entered on our subscription and University lists by special number.Put this number on the outside of your forwarding envelope (not the accompanyingreturn stamped envelope) and also put at the head of your queries. If already asubscriber, send $6 for renewal from close of present subscription and your name willbe entered in Radio University. No other premium given with this offer.

[In sending in your queries to the University Department please paragraph them so thatthe reply can be written under or alongside of each query. Write on one side of sheetonly. Always give your university number.]RADIO WORLD, 145 West 45th Street, New York City.

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City and State

Name

Street

to a movie and a picture of a movinglocomotive were thrown on the screen.A man in the orchestra rang a bell, blewa whistle and rubbed two pieces of sand-paper together. The illusion is complete.You have the picture of the tram andthe sound which accompanies it is realis-tic. But if you were blind and could notsee the picture of the locomotive, whenyou heard the ringing of the bell, theblowing of the whistle and the scrape ofthe sandpaper, you would probably askyour neighbor what all the noise wasabout.

A Hard Problem"When you were told that it was a

railroad locomotive your mental com-ment would be, 'that bell sounds like adinner bell and that whistle sounds likea ferryboat and that other noise soundslike pieces of sandpaper being rubbedtogether. That's no locomotive.' Now,do you see what the radio producer whotries to imitate sounds is up against? Hecannot as yet put a picture of the actionbefore the listener. He cannot gracefullycome before the microphone and baldlystate, 'The sound which you will nexthear will be that of a locomotive pullingout of a station.' That would give thelisteners a hearty laugh. His continuitymight hint that a locomotive was sup-posed to be nearby and then his imita-tion must be so realistic that there willbe no doubt of it.

"I remember recently when the Penn-sylvania railroad first broadcast fromWJZ they wanted to create the illusionthat the radio audience was joining withtheir entertainers on a railroad trip. Itwas up to me to make a noise like arailroad train. The job seemed simple. Igot a bell and a whistle and had some onesound them before the microphone whileI listened at a loudspeaker in anotherroom. The bell sounded so much like adinner gong that my mouth watered. Thewhistle sounded like one of New York'sfinest calling his mate.

Bells and Bells and Bells"I tried more bells and more whistles.

At one time I had fifty-seven bells andtwenty-nine whistles in the studio, but Iwas no nearer to a railroad train in soundthan I was when I started.

"Finally I had to have the railroad takea bell off one of their spare locomotives,mount it on wheels and send it up here.It is in the studio now, if you care tosee it. We had a locomotive whistle fit-ted to a compressed air blower and usedthat. I thought the effect was right. Thesound was genuinely made by the rearthings. Yet after the first broadcast wereceived several letters from the radioaudience complaining that our bell andwhistle didn't seem realistic I"

High FrequenciesFavored By Navy

WASHINGTON.Use of high frequencies has been

brought to a routine in the Navy Depart-ment for the transmission of messages.During the month of July the shore radiotraffic stations showed an increase of65 per cent, in volume of traffic handledby high frequency as compared to June,according to figures prepared by theComMunications Division of the Depart-ment. This is by far the best month todate in high frequency work.

The extent high frequency is effectingcommunications is shown in some degreein the commercial tolls paid by the NavyDepartment in _June, 1925, and June. 1926.In the first instance there were $1,000 andin the latter $400. The difference is duelargely to traffic sent on high frequencywhich was formerly routed by commercialwires on account of delays due to atmo-spherics.

Tubes -One to Nine What'll You Have?

- - -

A 5 -TUBE receiver employing, a stag., of sinturtecl radio frequency aolplitication.a regenerative detector, capacitively coupled, a stage of resistance arid two stagesof transformer coupled Al'. ',Mitts the aid of phone tip jachis or binding posts inthe RF output it is possible to connect thearitenisa and the ground to the 11.4,, for

input, or ass- the Rh' tube and obtain 1,1111,4,1,t11,1 results,

-3

Ii

'ers.

A 3 -TUBE reflex, wherein the RF-AF tubs- is neutralised. The grid is connectedvia a .60005 mfd. variable condenser to the antenna. This accounts for the greatvolume that ia possible to obtain with this set. A standard RFT can be used tocouple the RF-AF output to the detector input. A single wintlirig is used in theantenna. This may be the secondary winding of an RFT. Acontrols the filament temperature of the RE -AF And the AF tubes, while the

temperature of the detector tube is controlled by Zlii.otsin rheostat.

00 -so noas a- 5-

0-

A 4 -TUBE receiver employing a regenerative detector and three stages of renist-ance AF coupling. Single circuit jacks are inserted in the second AF output aswell as the last AF output. The detector tube should be of the -0IA type, the

next two AF tubes of the hi -mu and the last tube of the lo -mu type

r---- i

!c,". , I

2.-

t$441111011.111114

lilt:1agaissain

\ 1111

A UttllItL) 0 5

rsrruit tacos ao-tot is scsi, f0at !Ir.the dines eni t} 4.4 spisssg

..stiai

0

A POPUtAft Itistes regenerative roecenser, omployirig sins-1=44es, se thatesther the higher or the Luse *caps

147.Y.C164 CAA 14e. heard

IF YOU conmert Isiccecis as to theleft, you add the capacities If, as t9thr right, you 4,14, by the number

in the group, if equal capacities.

A WELL-BALANCED 9 -tube receiver. Six stages of tuned radio frequency amplification, a eon -regenerative detector Andtwo stages of transformer coupled AF amplification are meed. The first five stages of RF amplification arc neotrahasseb The

variable condenser may be ganged on one shaft, making it one -control,

T kl D

OFFICIAL LISTOF STATIONS

asmialsKDKA-Wesitaa-..as, r.... aataaarilLU1-R-Kadi0 ElcC. Co., Devils Lake, N. D. 231ICD L --Newhouse Hotel, Salt Lake City. Utah 246KF AB-Nabraaka Buick Auto Co., LincolnKFAB-Nabraska Auto Co, Lincoln, Neb. 340KFAD-Electrical Equip. Co., Phoenix, Ariz 223KFAF-A. E. Fowler, San Jose, Calif. 217KFAU-Ind. S.raohl Dist., Boise, Idaho 280KEBB-E. A. Buttry Co., Havre, Memo. 275KYBC-W. K. Azbill, Sao Diego. CaL 216KFBK-Kimball Upson Ca. Sacramento, CaL 248KFBL-Leese Bros.. Everett, Wash 234KFBS-School District No. 1, Trinidad, Col 238KFBU-St. Matthews Cathedral, Laramie

Wyo. 375KFCB-Nelson Radio Co., Phoenix, Aria 238KFDD-St. Michael's Episcopal Church, Boise,

Idaho 275

KFDM-Magnolia Petroleum Co., BeaumontTexas 316

KFDX-1st Baptist Church, Shreveport, La 250KFDY-S. D. State College. Broakiags, S. D 3330

KEDZ-11. U. lbcramt, Minneapolis, Minn 231KFc. - Wrier & Frank Co., Portland, Ore. 248KEEL- ice P. O'Fannon, Inc, Denver,

Col. 254KFEQ-J. L. Scroggio, Oak, Neb.... 268KFEY-Bunker Hill & Sullivan, Kellogg

Idaho 233KFFP-let Baptist Church. Moberly, Mo. 242KFGQ-Crary Co., Boone, Iowa 225KFli-Hotel Lassen, Wichita, Kann 268KFHA-Western State College, Gunnison, Cole, 252KFHL--Penn College, Oskaloosa, lows 34O

KFI-E. C. Anthony- Inc., Los Angeles, Ca] 469KFIF-Benson Institute, Portland, Ore 248K.F10-North Central H. S., Spokane, Wash 266KFIQ-Sat Methodist Church, Yakima. Wash 256KFIU-Alaaka Elec. Ca, Juneau, Alaska 725KFIZ-Daily Commonwealth, Fond du Lac,

Wis. 223KFJ B -Marshall Elec. Co-, Marahaltown, la 248KFJC-R_ B. Fagan, Junction. City, Kan 219KFJF-National Radio Co.. Oklahoma City,

Okla. 261KFJI-E. E. Marsh, Astoria, Ore 246KFJM-Craiersity of N. D., Grand Forks-- D8KFJR-Aahicy C. Dixon & Son, Portland, Ore. 263KFJY-Tunwall Radio Co., Ft. Dodge, Iowa. 246KFJZ-W. E. Branch, Fort Worth, 254KFK.A-Stare Teachers College, Greeley, Cola 173KFKLI-Uaiversit of Kansas, Lawrence, Kans. 295KFKX-Westinabause Co., Hastings, Nab.- 288KFKZ-Chamber of Commerce, Kirksville, Mo. 226KFLR-University of N. 3d., Albuquerque,

N. M. 254KFLU -San Benito Radio Club, San Benito,

Tex. 236KFLV-Swedish Evangelist Church, Rockford,

IIL 229KFLX-George R. Omagh, Galveston, Texas 240KFLZ-Atlantic Auto Ca, Annita, Ia 273KFMR-Moruingside College, Sioux City, Iowa 261KFMW-M. G. Satarem Houghton. Mich 263KFMX-Carlaton College, Northfield, Minn 337KFNF-H. Field Seed Co., Shenandoah, Iowa 461KFOA-Rhodos Company, Seattle, Wash 454KFOB-KFOB Inc-, Burlingame, CaL 235KFON-Lchophone Shop, Lung Beach, Cal 233KFOO-Latter Day Saints University, Salt

Lake City, Utah 236KFOR-David City Co., David City, NebKFOT--College Hill Radio Club, Wichita, Kan. 331KFOX-Technical High School, Omaha, Neb. 248KFOY-Beacon Radio Service, St. Paul, Minn. 252KFPL-C. C. Baxter, Dublin, Texas 252KFPM-New Furniture Co., Greenville, Texas 2,42KEPR-Forestry Department, Los Angeles, Cal. 231KFPW-St. John's (-lurch, Carterville, Mo, 358KFP Y. -Sy mans Investment CO., Spokane,Wash.L'SKFQA-The Principia, St. Louis, Mo. 351KFQB-Searchlight Pub. Co., Ft. Worth, Tex. 263KFQD--Chovin Co., Anchorage, AlaskaKFOP-43. S. Carson. Jr., Iowa City, la- 224KFQU-.W. Riker, Hay City, Cal 293KFQW-F. C. Knierins, North Bend, Wash 216KFQZ-Taft Product, Co.. Hollywood. Cal , 226KFRB-Hall Bros., Beeville. Texas.. 1548

KFRC-City of Paris. San Francisco, Cal 268KFRU-Stephens College, Columbia, Mo. 500KFRW-Wastern Broadcasting Co., Olympia,

Wash. 219KFSD-Airfan Radio Corporation, San Diego

Cal. 246KFSG-Echo Park Evang. Assn., Los Angeles D5KFUL.-T. Googan & Bra, Galveston, Tea ZSKFUM-W. D. Corley, Colorado Springs, Col. 240KFUO-Concordia Them Seminary, St. Louis,

Mo. 545KFUP-Farainarons Gen. Hospital, Denver 234KFUR-Peery Building Co., Ogden, Utah 224KFUS--Loui* L Sherman, Oakland, Cal 256KFUT-Univ. of Drab. Salt Lake- City, Utah 261KFUU-Calburn & Mathewson, Oakland, Cal 2:20KFVD-C. & W. J. McWhinnie, San Pedro,

Cal. 305KEVE-Film Corp., St. Louis, Mo. 240KFVG-1st MethErtia. Church, Independence,

Kan. 236KFVI-56th Cay. Bridgade, Houatoo, Tex 240KFVN-C, E. Bagley, Welcome. Minn. 227

Girardeau, al..KFN'T-Radio Sai, al, a la ..alKFWA-Brossratag a, .., Ca 0, .:.: a Coca, _r.KFWB-Warner 57., FirOr., ...'..',... Cal_ a.,KFWC-L E. 'Wall Saa Beraataaia, Co.KFWF-St Louis Troth Ceram, St_ Louis 214KFIVH-la al-. Mouse, Jr., Eureka, Cal 234KFWI-Rr.a... Entertainers. Inc., South San -

F :- . ,.. c-isca, CaL 220K.FWM-a...aand Educat. Soc., Oakland, Cal 202KFNVO-Lawrence Mott, Avalon, Cal. 211Krwu-Louisiarta. College, Pineville, La 2-38KFWV-Wilbur Jarman. Portland, Ore. 213LFXB-B. 0. Haller, Big Bear Lake, Cal 2133

KFXD--Service Radio Co., Logan, Utah 305KFXF-Pikes Peak Broadcasting Station Ca,

Cola Springs, Cola 350KFXH-Bledsoe Radio CO-, El Paso., Texas 342KFXJ-Mt. States Radio District, Inc., (Port-

able). Col. 216K1FXR--Clasaen Film Finishing Co., Okla_

City, Okla. 214KFXY-Mar'. M. Coangan, Flagstaff, Arta 205KFYF-Carl's Radio Den, Oxnard, Cal 205KF1(J-Houston Chronicle, Houston, Tex ,

(Portable) 238KFYO-Buchanan Vaugn Co., Texarkana,

Tex. 210KFTR-Hoskins Meyers, Inc-, Bismarck,

N. D. 248KGAR--Citiacti Pub. Co., Tuscon, Aria 244KGBS-A. C. Dailey, Seattle, Wash. 210KGRW-.M. Brotherson, Joplin. Mo. 25.5KGBX-Julius B. Abercombie. St. Joseph, Ma 348KGBY-A. C. Dunning. Shelby, Neb asKGBZ-Federal Line Stock Remedy Co., York,

Neb. 333KGCA-C. W. Greenlet', Deiorah, 1 380KGCB-Wallace Radio Institute, Oklahoma,

Okla. 111

KGO-General Electric Company, Oakland,Ca. 361

KGTT-Glad Tidings Tabernacle, San Fran-cisco, Cal.

KG0 1d. A. Malrooy, Honolulu, Hawaii 270KCW-The Oregonian. Portland, Ore 492KGY-St. Martin's College, Lacey, Wash 'L'tKHJ-The Times. law Angeles, Cal 405KHQ--Louis Wasruer, Spokane, Wash 273KJBS J. Brunton Co., San Francisco 230KJR-Northwest Radio Ca, Seattle, Wash-. 384KLDS-Reorganised Church of Jesus Christ of

Latter Day Saints, Independence, Ma 441KI_S--Warner Radio Co.. Oakland, Cal 250KI-X-Tribune, Oakland, Cal 503KLZ-Reynolds Radio Co., Denver, Colo 26KMA-May Seed and Nursery Co., Shenan-

doah, la. 461KMJ-Fresno Bee, Fresno, Cal 234

Co., Clay Center, Nebr 239KMO-Love Elec, Cu., Tacoma, Wash 250KM0X--Globe.Democrat, St. Louis, Ma 250KMTR-Ec hop hone MI g. Co., Hollywood,

Cal. 23$KNRC-C. B. Juneau, Hollywood, Cal 208KNX-Express, Los Angeles, Cal 337KOA-General Electric Co., Denver, Col 322KOAC-Oregon Agricultural Canoga, Cor

vallist, Ore_ 280KOB-College of Agra, State College, N. M.-, 349KOCH-Omaha Central High School, Omaha,

Neb. 258KOCW-Okla. College for Women, Chickashia,

Okla. 252KOIL-Mortarch Mfg., Co., council Bluffs, Ia 278KOWW-Frank A. Moore, Walla Walla, Wash. 295KPO-Hale Brothers. San Frasceico, Cal vaNKPPC-Presbytarian Church, Passadena, Cal. 229

Walla, Wash. 256KPRC-Houston Print Co., Houston, Tex 28'KPSN-Pasuclena Star -News, Pasadena, Cal , 311,

KQP-11, B. Read, Portland, Ore. 213

KQV-Doubleday Hill Elec. Co., Pittsburgh,. 275KQW--.First Baptist Church, San Jose, Cal 331

KRCA-RCA, portable, San Francisco andLos Angeles, Cal 3 O

KRE-Gazette, Berkeley, Cal. 246

KSAC-Kansas State Agricultural College,Manhattan, Kans. 341

KSD--Pmit Dispatch, St. Louis, Mo. 545KSL-Radio Service Corp., Salt Lake City,

Utah RIO

KSMR-S. M. \'alley R. R. Co., Santa MariaCaL 210

KSO-A. A. Berry Seed Co., Clarinda, Ls 742KTAB-ass.. Ilala'stars, Oakland, Cal i 6KTBI-Bible le at., Los Angeles, Cal. 294KTBR--Brown's Radio Shop. Portland, Ore 263KTCL-Bert F. Fisher, Seattle, 'Wash MtKTHS--New Arlington Hotel, Hot Springs,

Ark 375KTNT-N. Baker, Muacatine, la 431

KTW-1,4 Presbyterian Church, Seattle, Wash, 454KU0A-University of Ark., Fayettesville,

Ark. 300ROOM -State Unlearnt). of Montana, Mis-

soula, Mont 245

KUSD-University of S. I). Vermillion, S. D D8KUT-University of Texas, Austin, Tex 231KV00--Viler of Oklahoma, Bristow, OklaKWCR-H. F. Parr, Cedar Rapids, Ia §I51KWG--Portattle Wireless Tel. Co., Stockton,

Cal. 348KWKC-Diancan Studios, Kansas City, Mo 236KWKti -W. K. Henderson I. W. and S. Co ,

Shreveport, La 313KWSC-State College. Pullman, Wash 349KWIJC-A'estern Union College, LeaMart, Ia. 252KWWG-City, Brownsville, Tex. V9KYW-Weeringtonse Co-. Chicago 535KZKZ-Electric Supply Co-. Manila, P. 1 270KZM-P. D. Allen, Oakland, Cal 340

.

A,Z.10.1--- F51- , P. 1 aaahiAA-la. S. Navy, Arlingam, VS1 435

AAD----Ohio Meth Institute. 0 2543WAAF-Dravera Juurnal, Chicaga, 111. DSW AAM-1 Kelsmi Ca. Newark, N. J SOWAAW-Clumha Grail. Ex, Omaha, Neb. 28-31141WAI3B-alarrisburg Radio Ca a, Harrtataurg,

Pa_ 305Va ABC-Ashville Battery Ca. Asheville, N. C- 314WABl-Heat UniVe-T4isthat6 Choral,, Bartta.,

Me. araWABO-Lakc Ave. Bapt. Cl,. R.whcates, N.Y 378

ABQ--kiaaertord College Radio Club. Havver-aard. Pa. 361

WABR-S,Itt High Satatuol, Toledo, 0 263WABW-Collage of Wooster, Wooster, Oa- 22WABX-Ii. B. toy, Mt. Clemens, Mica 240paABY-'John liagaldi, Philadelphia. Pa 443WABZ-Coltaeum Place Baptist Church, New

OrIcaris, La S5WADC-Allen T. Simmons, Akron, 0 340WAFD-A. B. Parfet Cu., Port Murata Mich., 375WAHG-Grebe Co.. Richmond Hill, N. I' 316WAGM-12._ L. Miller, Royal Oak, Mich 225WA1T-A, H. Waite & Co.. Taunton, Mass 349.WAIU-Aaucriena Ins. Union, Cailamtis, Cl SSWAMD-Radisson Ca. Miuneapolis, Minn 02WAP1-Alabama Pal) technic, Auburn. Ali- 940WARC-American Radio Res. Corp.. Medford

Hillside, Maas. 761WATT-E4isou Co, (Portable) 344MasaWBAA-Purdue University) Weal Lafayette,

Issd. 1193

WBA1C-State Police, Harrisburg. Pa. 376WBAL -Gas and &cc. Ca, Baltimare, Md 346

SAO -James Millikia University,Decatur,

W B AP -Star Telegram, Fon Worth, Tex 476al'HAW-lat Baptist Climah, Naahville, Tema :2.36WBAX-1, H. Stengar, Jr,. Wakes Barre, Pa 256WBBL-Grace Covenant Presbyterian (lurch,

Richmond, aaa lbWBBM-Atlas Investment Cu., Chicago. ill 226WBBP-High School, Petosacy, Mich 238WBBR-Peoples Pulpit Ass., S. la, N. 1` 414WBBS-list Baptist Church, New Orleans, La 252WBBW-Rtiffner City, Norfolk, Va.WBBY-Waahigtan Light Infantry, Charles -

tan, S. C. 318WBBZ-C. L Carrell, (Portable), Chicago, Ill aleWBCN Foster McConnell, Chicago, Ill 266WBOC-Baxter Co., Grand Rapids, Mich 256WBES-Bliss Electrical School, Takata& Park,

Mich. 232WBOQ-Grahe & Co., Richtnotal 13111, N. Y.- 236Wball(-Miss S. Kate, N. Y. C 323WBRC-Bell Radio Corp., Birmingham, 348

WERE -Baltimore Radio Ex., Wilkes-Barre,Pa. 231

WBRS-Universal Radio laig. Co., Brooklyn,

WBT-Commerce Chamber, Charlotte, N. C XSWHZ -aVastitighouse Co., Springfield, Maas 333WBZA-Westinghouse Electric and Mfg. Co ,

Boston, Maya. 242WCAC-Agricultural College, Mansfield, Conn. 225WCAD-St. Lawrence University, Canton,

N. Y 263WCAE--Kaufman & Baer, Pittsburgh, Pa 401

WCAJ--Nebraska Wesleyan University, Oui-varsity Place. Neb. 1254

WCAL-St. Olaf College. Northfield, Minn- 3.39

WCANI-Galvin Radio Supply Cu_, Camden,N.J. 236

WCAO-Bragar of Baltimore, Baltimore, Md 375WCA-R-Southern Radio Carr.. San Antonio,

Texas 363WCAT-School of Mines, Rapids City, S. D 2411

WCAU-Universal Broadcasting Ca, Phila.dalphin, Pa. 278

WCAX-University of Vermont, Burlington,N't. 250

WCBA-C. W. Heinbach, Allentown, Pa 254WCBD-W, G. Voliva, Zion, Ill. 345WCBE-Uhedt Radio Co., New Orleans La 363WCBH-1,niversity of Mississippi, Oxford,

Miss. 349WCBR-C. H. Messier R 1 210WCBS-H. L Downing laurtable), Pravalcncc.

R. 1. 342WCCO-Gold Medal Station, MitmeapaheaSt

Paul, Mint, 416WCK-Stier Barr & Fuller Co., St. Louis, Mo 223WCLO-C. E. Whitmore, Camp Lake, Wis 211WeLS- H. M. Church, Joliet. Ill 114WCMA -Calvet- Military A,mleniy, Culver.

259WCMB-Hatel Chapeau, Baltimore, Mid. 229WCO A - Municipal Station, Pensacola, Fla 223WCRW C. R. White, Chicago, Ill 240WeSli-Henry P. Rine*, Portland, Mr. 256WCWS-C. W. &den, Providence, R 1 noWCX-Detroit Free Press di Jewett Radio andWDZ ). L. Bush, Tuscola, Ill 278WDAD-Doll's Auto Accessories, Inc., Nash-

ville, Tenn, 876WDAE-Tampa Daily News, Tampa, Fla 373

WDAF-Kansas City Star, Kansas City, Mo. 366WDAG-J. L Martin, Amarillo, Tee 388WDAH-Trinity Meta Church, El Paso, Tea. 22WDAY-Radio Equipment Corp., Fargo, N. D. 261WDBE-Gilham.Scolien Elec., Atlanta, Ga 278WBDJ-Richardson Wayland, Roanoke, Va 23>W1313K-M.. F. Bros, Fern., Cleveland, 0 222W0130--Rotlins College, Winter Park. Fla 248wpaz-Boy Scouts of Amer., Kingstan, N.Y. 343WDCH-Dartmouth College, Hanover, N. H 250WDGY-Dr. G. W. Young, Minneapolis, Minn. 363WDND-Dud's Auto Accessories, Inc., 160-

164 8th Age- N., Nashville, Tenn- 236WDOD-Chart.Radio Co., Chattanooga, Tenn. ZtiWDZ-J. L., Bush. Tuscola, Ill 222WDRC-Doolittle Radio, New Haven, Canna. 262WDWF-Dutee Wilcox Flint, Cranston, R. I. 441WEAF-Broadcasting Company of America,

N. Y. (Sty, N. Y 492

September 11, 1926 RADIO WORLD 17

Station Owner and Location MetersWEAI-Cornell University, Ithaca, N. Y 254

WEAM-BorouPlainfiegh

ofJ.North Plainfield, N

261ld, N.WEAN-The Shepard Co.. Providence, R. I.,. 367WEAO-Ulan State University, Columbus, 0. 294WEAR-Willard Storage Battery Co., Cleve-

land. 0. 390WEAU-Davidson Bros. Co., Sioux City, Ia 275WE.BC-W. C. Bridges, Superior, Wise 242WEED-Elec. Equipment & Service Co., An-

derson, hid. 246WEBH-Edgewater Beach Hotel, Chicago, NI 370WEBJ-Third Avenue R. R. Co., New York,

N. Y. 273

WEBL-Radio Corp. of Ann. (Portable) 226WEBQ-Tate Radio Co., Harrisburg, DI 226WEBR-H. H. Howell, Buffalo, N. Y 244WEBW-Beloit College, Beloit, Wisc 268WEBZ-Savannah Radio Corp., Savannah, Ga 263VVEEI-Edison Co., Boston, Mass. 349WEHS-Robert E. Hughes, Evanston, 203

WEMC-Emm. Missionary College, MerrienSprings, Mich. 286

WENR-All-Amer. Radio Co Chicago, Ill. 266WEW-St. Louis University, St.rp Louis, Ma 360WFAA-Dallas News & Journal, Dallas, Tex. 476WFAM-The Times, St. Cloud, Minn 273WFAV-University of Nebr., Lincoln, Nebr , 275WEBC-lst Baptist Church. Knoxville, Tenn. 230

WFBE-J. V. De Walle, Seymour, Ind 226WFBG-W F. Gable Co., Altoona, Pa 278WFBI-Galvin Radio Supply Co., Camden

N. J 236

WFBJ-St. Johns University, Collegeville,236Minn.

WFBL-Onondaga Hotel, Syracuse, N. Y 252WFBM-Merchants Lighting Co., Indianapolis,

268WFBR-Maryland National Guard, Baltimore,

Md. 254WFBZ-Knox College, Galesburg. Ill 254WFCI-Frank Crook, Inc., Pawtucket, R. I 229WFCL-Chicago Fed.. of Labor, Chicago, Ill 492WFDF-F. D. Fallain, Flint, Mich 234WFI-Strawbridge & Clothier, Philadelphia,Pa.395WFKB-F. K. Bridgman, Chicago, Ill 217WFRL-R. M. Lacey, Brooklyn, N. Y a 208WGAL-Lancaster Elec. Supply Co., Lancas-

ter. Pa. 248WGBB-H. H. Carman, Freeport, N. Y 244VVGBC-Ist Baptist Church, Memphis, Tenn 278WGBF-Tbe Finke Furniture Co., Evansville,

Ind. 236WGBH-Fort Harrison Hotel, Clearwater, Fla. 266WGBI-Scranton Broadcasters, Inc., Scran-

ton, Pa. 240WGBR-Marshfield Broadcasting Association,

Marshfield, Wis. 229WGBS-Gimbel Brothers. New York, N. Y 316WGBU-Florida Cities Finance Co., Fulford

B y -the-Sea, Fla. 278WGBX-University of Maine, Orono, Maine 234WGES-Oak Leaves Broadcasting Station,

Oak Park, Ill. 250WGHB-G. H. Boules, Developments, Clear

water, Fla. 266WGN-The Tribune, Chicago, Ill. 303WGMU-A. H. Grebe & Co., Inc., Richmond

Hill. N. Y. 236WGCP-May Radio Broadcast Corp., Newark,

N. J. 252WGHB-G. H. Boyles, Clearwater, Fla 266WGHP-G. H. Phelps, Inc., Detroit, Mich 270WGIV1U-Grebe & Co., Richmond Hill, N. Y 236WGR-Federal Tel. Mfg. Co., Buffalo, N. Y.. 319WGST-Ga. School of Tech., Atlanta, Ga 270WGY-General Elec. Co., Schenectady, N. Y. 380WHA-University of Wisconsin, Madison, Wis. 535WHAD-Marquette Univ., Milwaukee, Wis... 275WHAM-Eastman Sch. Music, Rochester, N.

Y. 278WHAP-Taylor Finance Corp., N. Y. C 431WHAR-Cook's Sons, Atlantic City, N. J 275WHAS-The Courier Journal -Times, Louis-

ville, Ky. 400WHAV-Wilmington Elec., Wilmington, Del.. 266WHAZ-Rensselaer Institute, Troy, N. Y 280WHB-Sweeney School Co., Kansas City, Mo 366WHBA-Shaffer Music House, Oil City, Pa 250WHBC-Rev. E. P. Graham. Canton, Ohio 254WHBD-C. W. Howard, Bellefontaine, Ohio 222WHBF-Beardsley Co., Rock Island, III 222WHBG-John S. Skane, Harrisburg, Pa 231WHEC-Hickson Elec. Co., Rochestr, N. Y 258WHBJ-Laver Auto Co., Ft. Wayne, Ind 234WHBL-C. L. Carroll (Portable), III 216WHBM-C. L. Carroll (Portable), Chicago 233WHBN-Ist Ave. Methodist Church, St. Pet-

ersburg, Fla. 238WHBP-Johnstown Auto Co., Johnstown, Pa. 256WHBR-Scientific K. M. Co., Cincinnati, 0. 216WHBQ-St. Johns Meth. Church, Memphis,

Tenn. 233WHBU-B. L Bing's Sons, Anderson, Ind 219WHBY-St. Norbit's College, De Pere, Wis. 250WHBW-D. R. Kiemzle, Philadelphia, Pa 216WHDI-Wm. Hood Dunwoody Ind. Last ,

Minneapolis, Minn. 278WHEC-Hickson Elea Co. Rochester, N. Y 258WHFC-Hotel Flanders, Chicago, 259WHN-George Schubel, New York, N. Y. 361WHK-Radio Air Service Corp., Cleveland,

Ohio 273WHO-Bankers Life Co., Des Moines, Ia 526WHT-Radiophone Broadcasting Corp., Derr

field. III 400WIAD-H. R. Miller, Philadelphia, Pa 250W1AS-Home Electric Co., Burlington, Ia 254WIBA-Capital Times, Madison, Wis. 236WIBG-St. Paul's E. P. Church, Elkins Park,

Pa. 222WIBH-Elite Radio, New Bedford, Mass 210WIBI-Frederick B. Gittell, Flushing, N. Y 219WIBJ-C. L. Carrell, Chicago, (Portable).., 216WIBO-Nelson Bros., Chicago, III. 226

Station Owner and Location MetersWIBM-Billy Maine, Chicago, III. 216W1BR-Thurman A. Owings, Weirton, W. Va 246WIBS-Lt. T. F. Hunt, Elizabeth, N. J 203WIBU-The Electric Farm, Poynette, Win 222WIBW-Dr. L. L. Dill. Logansport, Ind 220wmx-WIRY, Inc., Utica, N. Y 234W IBZ-A. B. Truro, Montgomery, Ala. 231WIL-Benson Radio Co., St. Louis, Mo 273WIOD-Carl S. Fisher Co.. Miami, Fla. 248WIP-Gimbel Brothers, Philadelphia, Pa 508WJAD-lackson's Radio Elec. Co.. Waco. Tex 353WJAF-J. A. Fenberg Radio Co., Ferndale,

Mich. 400

WJAG-Norfolk Daily News, Norfolk, Nebr 270WJAK-Kokomo Tribune Station, Kokomo,

Ind. 254

WJAM-D M. Perham, Cedar Rapids, Ia 268WJAR-The Outlet Co., Providence, R. I 306WJAS-Pit tsburgh Radio Supply House,

Pittsburgh, Pa. 275

WJAX-Voice of Jacksonville, Fla. 337WJAZ-Zenith Radio Corp., Mt. Prospect, Ill. 322WJBA-D. H. Lentz, Jr., Joliet, Ill 207WJBB-L. W. McClung, St. Petersburg, Fla 254WJBC-Hummer Porn. Co., La Salle, Ill 234WJBE-Financial Journal, St. Petersburg,

Fla. . 254WJBI-R. S. Johnson, Red Bank, N. J 219WJBK-Ernest F. Goodwin, Ypsilanti, Mich 233WJBL-Gushard Dry Goods, Deratur, III 270WJBO-V. Jensen, New Orleans, La 268WJBQ-Bucknell University, Lewisburgh, Pa 211WJBR-Omro Drug Store, Omro, Wis 228WJBT J. S. Boyd, Chicago, Ill, 238WJBU-Bucknell University. Lewisburg, Pa. 212WJBV-Union Course Lab., Woodhaven,

N. Y. 470

WJBW-C. Carlson, Jr., New Orleans, La 341WJBX-Henderson & Ross, Ostezville, Mass 280WJBY-Electric Construction Co., Gadsden,

Ala. 270

WJJD-Order of Moose, Mooseheart, III 370WJR-Detroit Free Press and Jewett Radio

and Phonograph Co., Pontiac, Mich, 517WJY-Radio Corp. of Amer., N. Y. C 405WJZ-Radio Corp. of Amer., N. Y. C., Bound

Brook, N. J 455WKAF-WKAF broadcasting Co., Milwaukee,

261WICAQ-Radio Corp. of Porto Rico, San

Juan, P. R. 341WKAR-Mich, Agric, College, Lansing, Mich 286WKAF-WKAF Co., Milwaukee, Wis 261WKAV-Laconia Radio Club, Laconia, N. H 224WKBA Arrow Batt. Co., Chicago 288WKBB-Sanders Bros., Joliet, Ill 283WKBE-K & B Elec. Co., Webster, Mass 270WKBD-Frank V. Brenner, Jersey City, N. J. 235WKBF-N. B. Watson, Indianapolis, Ind , 244WKBG-C. L Carrell, (Portable) Chicago. ill. 216WKBH-Callaway Music Co., La Crosse, Wis. 250WKBI-Fred L. Schoenwolf, Chicago, Ill 220WKBS-H. L. Ansley, Birmingham, Ala 225WKBJ-Gospel Tabernacle, St. Petersburg,

Fla. 280WKDR-Edward A. Date, Kenosha, Wis 428WKRC-Kodel Rad;n Corp., Cincinnati, 0. 326-422WKY-Hill Richards, Oklahoma City, Ok 275WLAL-lst Presbyterian Church, Tulsa, Okla, 250WLAP-W, V. Jordan, Louisville, Ky 275VVLB-University of Minn., Minneapolis, Minn. 278WLBL-Wisconsin Department of Markets,

Stevens Point, Wis. 278WLIB-Liberty-Weekly Inc., Elgin, Dl. 303WLIT-Lit Brothers, Philadelphia, Pa. 395WLS-Sears Roebuck Co., Chicago, III 345WLSI-Lincoln Studio Inc. Providence, R. I.. 441WLTS-Lane Technical H. S., Chicago 258VVLW-Crosle-y Radio Corp., Cincinnati, Ohio 422WLWL-MiSsionary Society of St. Paul the

Apostle, N. Y. City 288WMAC-C. B. Meredith. Cazenovia, N. Y 275WMAF-Round Hills Radio Corp., Dartmouth,

Mass. 441.WMAK-Norton Laboratory, Lockport, N. Y. 266WMAL-Leese Optical Co., Washington,

D. C. 213WMAN-lst Baptist Church, Columbus, 0 278WMAQ-Chicago Daily News, Chicago, Ill 448WMAY-Kings Highway Presbyterian Church,

St. Louis, Mo. 248WMAZ-Mercer University, Macon, Ga 261WMBB-Amer. Bond and Mort. Co., Chicago 250WMBC-Mich. Broadcasting Co., Detroit 256WMBF-Fleetwood Hotel. Miami Beach, Fla. 384WMBI-Moody Bible Institute, Chicago, 288WMC-Commercial Appeal, Memphis, Tenn 500WMCA-Hotel McAlpin, N. Y. C., Hoboken 341WMRJ-P. J. Prinz, Jamaica, N. Y 227VVMSC.-Madison Square Garden B'dstg Corp.,

N. Y. C 303WNAB-Shepard Stores, Boston, Mass 280WNAC-Shepard Stores, Boston, Mass 430WNAD-University of Okla., Norman, Okla 254WNAL-Omaha Central High School, Omaha,

Nebr. 258WNAT-Lenning Bros. Co., Philadelphia, Pa 250WNAX-Dakota Radio App. Co., Yankton,

S. D, 244WNBH-New Bedford Hotel, New Bedford,

Mass, 248WNJ-Radio Shop, Newark, N. J. 252WNOX-Peoples Tel. & Tel. Co., Knoxville,

Tenn, 268WNYC-Municipal Station, New York, N. Y 526WOAI-Southeast Equip. Co., San Antonio,

Tex. 395WOAN-Vaughan Con. of Music, Lawrence -

burgh Tenn. 233WOAW-NWeboodr. rnen of the World, Omaha,

526WOAX-F, J. Wolff, Trenton, N. J. 240WOC-Palmer School of Chiro, Davenport, Ia. 484

Owner and LocationStation -Hotel Jamestown, Jamestown N. Mte"Y.e.275WODA-O'Dea Temple of Music, Paterson

WOI-Iowa State College, Ames, Iowa 270WOK-Nweuotod,rowoluilnd Radio Mfg. Co., Home-

233WOKO-Earl Patterson, N. JWOO-John Wanamaker, Philadelphia, Pa 508

WOOD-Grand Rapids Radio Co., GrandRapids, Mich, 2,42

WOO-Unity School of Christianity, Kansas278

WOR-L. Bomberger & Co Newark, N. J. 405WORD-Peoples Pulpit Assn., Batavia, 111 275WOS-State Market Bur., Jefferson City, Mo.441WOWO-Main Auto, Ft. Wayne, Ind 227WPAK-N, D. Agricultural College, Agricul-

tural College, N. D. 275

WPAP-Palisades Amusement Park, Clifford,N. J. 360

WPCC-N. Shore Congre. Church, Chicago 258WPDQ-H. L. Turner Buffalo, N. Y 205WPG-Municipality, Atlantic City, N. J 300WPRC-Wilson Radio, Harrisubrg, Pa 216WPSC-Penn State College, State College, Pa. 261WQAA-H. A. Beale, Jr., Parkersburg, Pa , 220WQAC-Gish Radio Service, Amarillo, Tex 234WORE-Moore Radio News Station, Spring-

field, Vermont 246WOANI-Electric Equipment Co., Miami, Fla. 263WQAN-Scranton Times, Scranton, Pa. 250WQAO-Calvary Baptist Church, New York,

N Y 360

WQJ-Calumet Rainbo Broadcasting Co., Chi-cago, III. 448

WRAF-Laporte Radio Club. Wash., D. C 224WRAH-S. N. Read, Providence, R. I. 235WRAK-Economy Light Co., Escanaba, Mich. 256WRAM-Lombard College, Galesburg, Ill 244WRAV-Anrioch College, Yellow Springs, 0 263WRAW-Avenue Radio Shop, Reading, Pa 238WRAX-The Berachah Church of Philadelphia,

Glouct.ster City, N. J. 280WRBC-Immanuel Lutheran Church, Val-

paraiso, Ind. 278WRG-Radio.Corp. of America, Washington,

D. C. 469Radio Co., Raleigh, N. C 252

WREC-Wooten'a Radio Shop, Cold Water,254

WREO-Reo Motor Co., Lansing, Mich. 286WRHF-Washington Radio Hospital Fund,

Wash., D. C 256WRHM-Rosedale Hospital, Minneapolis, Minn 252WRK-Doron Bros., Elec. Co., Hamilton, 0 270WRM-University of Illinois, Urbana, III 273WRMU-A. H. Grebe & Co., hie., Motor

Yacht Mu -I, N. Y. City ZtaWRNY-Experimenter Pub. Co., N. Y. C 375WRR-City of Dallas. Tex 246WRST-Radiotol Mfg. Co., Inc., 5 First

Bay Shore, N. Y 216WRVA-Laurus & Bros., Co., Richmond, Va 256WRW-Tarrytown Research Laboratory, Tar-

rytown, N. Y. 273WSAI-U. S. Playing Card Co., Cincinnati, 0 326WSAJ-Grove City College, Grove City, Pa 229WSAN-Allentown Call. Allentown, Pa 229WSAR-Doughty & Welch Elec. Co., Fall

River, Mass. 25-4WSAX-Zenith Radio Corp., Chicago, Ill 268WSAZ-Chase Electric Shop, Pomeroy, Ohio 244WSB-The Atlanta Journal, Atlanta, Ga 428WSBC-World Battery Co., Chicago, 288WSBF-Stix Baer and Fuller, St. Louis, Mo 273WSBT-South Bend Tribune, South Bend. Ind 275WSCO-Wittenberg College, Springfield, Ohio 248WSDA-7th Day Adventist Church, N. Y. C 263WSKC-World's Star Knitting Co., Bay City,

Mich.268WSM-National Life and Accident Ins., Nash-

ville, Tenn. 283WSBM-Saenger Amus. Co., New Orleans 319WSMH-Shathick Music House, Owosso, Mich. 240WSMK-S. M. K. Radio Corp., Dayton, 0 275WSOE-School of Engineering, Milwaukee 246WSRO-H. W. Fahlander, Hamilton, Ohio 251WSSH-Tremont Temple Baptist Church,WSUI-State University of Iowa, Iowa City,

Ia. 484WSVS--Seneca Vocational School, Buffalo,

N. Y. 219WSWS-S. W. Straus & Co., Woodale, 275WTAB-Daily Herald, Fall River, Mass 266WTAD-R. E. Compton, Carthage, DI 236WTAG-Telegram, Worcester, Mass 545WTAL-Toledo Radio & Elec. Co., Toledo, 0 252WTAM-Wilard Storage Batt. Co., Cleveland 389WTAP-Cambridge Radio Elec. Co., Cam-

- bridge, Ill. 242WTAQ-S. Van Gordon & Son, Osseo, Wis 254WTAR-Reliance Radio Co., Norfolk, Va 261WTAW-Agricultural & Mech. College, Col-

lege Station. Tex 270WTAX-Williams Hardware, Streator, Ill 231WTAZ-T. J. McGuire, Lambertville, N. J 261WTIC-Travelers Insur. Co., Hartford, Conn. 476WUBO-V. Jansen, New Orleans, La 268WWAE-Electric Park, Plainfield, Ill 242WAO-Michigan College of Mines, Hough-

ton, Mich. 263WWGL-Radio Engineering Corp., Richmond

Hill, N. Y. 213WWI-Ford Motor Co., Dearborn, Mich 266WWJ-Detroit News, Detroit, Mich 353WWL-Lovola University. New Orleans, La 275WWRL-Woodside Radio Lab., Woodside,

N. Y. 259

TABLE FOR CONVERSION OF FRE-.OUENC1ES AND METERS appeared in RADIOWORLD dated May 1, 1926. Sent on receipt of15c, or start your sub. with that number. RADIOWORLD, 145 W. 45th St., N. Y. C.

18 RADIO WORLD September 11, 1926

Impromptu UncleSaved By Religion

Suddenly Called on to Entertain With Bedtime Story,He Takes a Remark of Dr. Cadman's as Cue

And Makes a Success

Do you know how it feels to be sud-denly called upon, thousands of milesfrom home, to face the mike and tell bed-time stories to the children of the radioaudience?

Only those who at some time have beenasked to say a few impromptu words inbroadcasting studio or elsewhere beforethe microphone can possibly picture sucha situation.

While visiting station 5CL at Adelaide,South Australia, Phil A. La Brie facedthis test. He visited J. L. Smallacombe atthe station in connection with some Fadaradio matters. Mr. Smallacombe is knownto the kids of his land as Uncle Radio.It was around 6 p. m. and the bedtimestories were on the air. Uncle Radio,King Electron and Auntie Peggy werehaving a great time and their listeners abetter one. While La Brie rested thebedtime stories went on apace.

"I sat there in front of a little table andsmoked my pipe," said Mr. La Brie. ''AsI watched their antics I could not helpthinking that if the listeners -in were en-joying it as much as I, then this particu-lar period was undoubtedly a genuinesuccess. Comedy seemed to be at itsheight when, presently, Uncle Radio ex-claimed: 'Oh look! See who is with us,a great big Uncle from the United States.'And then he proceeded to give a descrip-tion of me.

"The next thing I knew Uncle Radiowas saying: 'Now, listeners -in, you willhear a few stories from Uncle Sam,' andthe microphone was placed on the tablein front of me. Both Uncle Radio andKing Electron left the studio. There Iwas, alone with the mike and AuntiePeggy, who remained at the piano.

"To make matters worse I had not beenintroduced to her. You will understandthe situation and my sense of lonlinessmuch better when I tell you that onedoes not get very far in South Australiasocially unless he is properly introduced.Formality is one of the necessities topromote social contact in this part of theworld. Glancing over in Auntie Peggy'sdirection got me no look of encourage-

went from her. She kept her eyes righton the music in front of her.

"If ever there was a time when Ineeded a friend it was this particularmoment. There I had let my thoughtswander away on the rapid comedy of theentertainers of the studio. I had swelledout at the description given of me andthought the idea of giving my dimensionsa very jolly one, to say the least. Theintroduction came so rapidly I had notgot out of my contemplative mood. Imight as well confess at this point thatnot only had I never before listened -inin my native country when the bedtimestories came over the air but actuallycould not recall having heard any whena kid myself. I actually suffered mikefright.

"And what do you think crashedthrough my brain all of a sudden? Aremark that I heard Rev. Dr. S. ParkesCadman make at the Young Men's Con-ference in Brooklyn, N. Y., over the airone night a long time ago 1 Yes, sir,religion carne to my rescue. I don'tknow how I did it, but starting out withthe remark of Dr. Cadman I managed toput over a talk that was distinctly relig-ious in its nature.

"I talked and talked and when I hadbeen going along some time an announcerhanded me a slip of paper on which waswritten: 'You have four minutes to go.'

"I learned afterward that I had carriedon for thirty minutes altogether. Al-though I made a pretense at jumping onthe studio management for putting oversuch a stunt on me when I was unpre-pared, my wrath had subsided by thenext day when the mail brought fifteenletters asking for Uncle Sam to come onthe air again. The following day broughtthe total number of letters to 300."

As a result of the first talk and becauseof the increasing number of letters thatcame in, the station asked Mr. La Brie tocontinue his talks. He prepared a series,going on the air four evenings in succes-sion, and entertained the children andgrownups.The enjoyment was mutual.

Nibbling by MouseCostly to Financier

Trouble with growingly poor reception,Bertram Reinitz, of 127-A Clarkson Ave.,Brooklyn, N. Y., financier, bo6ghtset of six new tubes, total price $15. Noimprovement, so he put in two new vari-able condensers, at $10 a pair.

His A battery was 4 -volts, to feed type99 tubes, and the leads ran through thefloor from the cellar. One night whenhe went into the cellar to make sure thefamily casks of vinegar still were intact

his wife called to him that the set sud-denly had started to be scratchy again.He glanced at the battery leads in thecellar and there he saw a mouse nibblingthe insulated wire. The mouse evidentlyhad enjoyed almost nightly contacts withthe small current, like a child playingwith a shock machine. The wire wasweak from being nibbled. Riinitz fixedthis, totally shielded the leads, and radioserenity ensued.

A POPULAR QU

THE EVEREADY HOUR MIXED QU,and a chain of stations, and who appearNew York City. Left to right, Charles pn

Rose Bryant, contralto, a \

Casting RoIs Bali,

Players Must Not ExceedBe Given Audition to

Problems in Ratd,,

The radio presentation of moving pic-ture scenarios, one of the features ofWJZ's Thursday evening programs forthe past six months, is more difficult thanwould appear on the surface, according toColonel C. T. Davis, who makes the adap-tations.

The movie scenarios, when received,cover a story requiring from one to threehours, four to ten reels, to relate pic-torially. The cast of the movie is alwayslarger than that possible to use in theradio presentation.

The first task is to "boil down" the storyto a few scenes which will carry the fullthread of the -plot and not exceed twenty-five minutes. The number of charactersmust then be cut to not more than fouror five, because with more than. that num-ber in a radio play the audience, usingthe sense of hearing only, are not ableto distinguish the characters by theirvoices, and become confused. When thesetwo things have been accomplished, thereal work starts.

The dialogue is written with the ideaof not wasting a word. With the radioadaptation completed, the casting isstarted. This is often the most difficulttask of all. Often fifty or more personsare tried for a single part.

Although at most only four or five per-

September 11, 192d RADIO WORLD 19

iFET ON THE AIR

'ET, featured regularly from WEAFtally at the Radio Industries Banquet,

Fxrison, tenor; Betsy Ayres, soprano;of Wilfred Glenn, basso.

lio Playling Workye, and Often 250 Must:et This Number-ted Movie Plots

ails are needed, each one must possessvoice typical of the part he or- she is to

May and at the same time the voice mustof be close enough in tone quality tonother voice in the same cast or con-usion of the listeners will result.When the cast has been completed, the

"speakie" goes into rehearsal, at first onlyialogue, and on the last four or five, theitisical setting is rehearsed with the play.

4.'3rokenshire HonoredAt Seaside Pageant

Norman Brokenshire, one of radio'shost popular announcers, was selected to..:trve as master of ceremonies and official

'nnouncer at the Atlantic City Pageant,held in Atlantic City on September 8, 9,nd 10. This was the first time in the

pNtory of the pageant that a radio an-4ouncer had been chosen for this import-

work. Last year De Wolf Hopper,t.irved in a similar capacity.ir In selecting Mr. Brokenshire, of station1;VJZ to fill this key position in theiageant ceremonies, the committee wasiifluenced by the widespread popularityrf the radio fans' idol, as he is referred

) in broadcasting circles.

Officials AlarmedOver Interference

Commerce Department Fears Trouble Unless Industry,Broadcasters and Public Unite to Obtain Legis-

lation-Hoover Declines to Head Union

WASHINGTON.Chairmanship of a permanent organiza-

tion of the radio industry, includingmanufacturers, broadcasters and the pub-lic, has been declined by Secretary ofCommerce Herbert Hoover.

Expressing the desire to see the crea-tion of such an organization which wouldhelp to relieve the .threat of confusion thisWinter before the enactment of legisla-tion, Secretary Hoover nevertheless as-serted that it would be impossbile for himto accept the post.

The offer of chairmanship of the or-ganization was made to Mr. Hoover bythe Radio Section of the AssociatedManufacturers of Electrical Apparatus.

In the absence of Secretary Hooverfrom Washington, Acting SecretaryStephen Davis said he believed condi-tions might be very bad at the beginningof the radio season this Fall unless somesuch an organization begins to function.

Officials of the Department of Com-merce, while refusing to interfere in anyway, are daily becoming more concernedover the broadcasting situation. Withnew applications for licenses pouring intothe office of the Chief Radio Supervisor,prospects are that nearly 100 new stationswill take advantage of the Departmentof Justice ruling that under the existinglaw there is no authority for the limita-tion of stations or, allocation of wave-lengths.

Many complaints reached the Depart-ment of Commerce last Winter due tomany stations interfering with one an-other. At that time there was somesemblance of order and most of thepowerful stations enjoyed a 10 -kilocycleseparation from others.

With stations taking matters into theirown hands, the old 10 -kilocycle separa-tion scheme has been abandoned, and, forthat matter, so has every other rule de-vised for the elimination of interference.

Chief Radio Supervisor Terrell is al-ready preparing for the downpour of pro-tests or complaints of interference whichis expected when the season opens up.Mr. Terrell is contemplating havingprinted several thousand copies of a letterexplaining that the Department of Com-merce is powerless to do anything tohelp. It is expected. to use this letter toanswer complaints of interference.

If reception this Winter proves as goodas normal, the former class B band willprobably be as congested as was theformer class A band. In such an event,fans may be able to obtain satisfactoryreception only from their local station.

Sets Were PopularWith Vacationists

LOS ANGELES.Letters from radio followers on vaca-

tions have been heavy, according to acheck made by KNX. Many more motortourists, it seems, took radio equipmentalong with them this year than everbefore.

Although Summer reception isn't con-sidered equal to that of Fall and Winter,some good distance reports have come in.In checking over the letters people inthe Owens River Valley have no difficultyin listening to KNX and other LosAngeles stations, it would seem from theglowing accounts that are given.

Kingdom for a WordTo Describe-er-ahemIs a saxophone player an artist?'Is a ukulele player a musician?Is a tenor a performer?

These and similar questions are troubl-ing KFI, which is in search of a termthat will satisfactorily describe all whoperform nightly before the nation'smicrophones.

A term generally applied is "artist," butKFI hesitates to apply this term indis-criminately. The word "musician" doesnot include all who have to deal with themicrophone, even when qualified as"radio musician," and, strictly speaking,"performer" cannot be used as a generalterm, since it suggests visual action, while"entertainer" lacks dignity.

Over a year ago KFI coined the word"receptionist," which has come into com-mon usage with the general betterment

of programs, it being undoubtedly un-dignified to refer to "fans" in the samebreath with a .Brahms concerto, while"listener" does not fully connote the veryimportant part that is being played inradio by the audiences of today. KFIbelieves that it will be necessary to coina word that will as aptly describe thepeople behind the microphone as "recep-tionist" does those before their loudspeakers.

"Microphonist," "microphoner," "micro-tician," and even, facetiously, "radiator"have been suggested. In this day of pun-gent and powerful additions to our mothertongue it should be a simple matter tofind the word it is looking for so KFIissues a cordial invitation to all two-fistedword coiners to join in the search for aterm that will properly enrich the Ameri-can language.

RADIO WORLD September 11, 1926

OFFICIAL LISTOF STATIONS

(Corrected and Revised Up toAugust 31)

Station Owner and Location MetersKDKA-Westinghouse Co., Pittsburgh 309KDLR-Radio Elec. Co., Devils Lake, N. D. 231KDYL--Newhouse Hotel, Salt Lake City, Utah 246KFAB-Nebraska Buick Auto Co., LincolnKFAB-Nebraska Auto Co., Lincoln, Neb. 340KFAD-Electrical Equip. Co., Phoenix, Ariz 273KFAF-A. E. Fowler, San Jose, Calif. 217KFAU-Ind. Scoohl Dist., Boise, Idaho 280KFBB-F. A. Buttry Co., Havre, Mont. 275KFBC-W. K. Azbill, San Diego, Cal. 216ICFBK-Kimball Upson Co., Sacramento, Cal 248KFBL-Leese Bros., Everett, Wash 224KFBS-School District No. I, Trinidad, Col 238KFBU-St. Matthews Cathedral, Laramie,

Wyo. 375KFCB-Nielson Radio Co., Phoenix, Ariz 238ICFDD--St. Michael's Episcopal Church, Boise,

Idaho 275KFDM-Magnolia Petroleum Co., Beaumont,

Texas 316KFDX-1st Baptist Church, Shreveport, La 250KFDY-S. D. State College. Brookings, S. D 306KFDZ-H. 0. lberson, Minneapolis, Minn.- 231KFE.... -Meier & Frank Co., Portland, Ore. 248KFEL-Eagene P. O'Fannon, Inc., Denver,

Col. 254KFEQ-J. L. Scroggin, Oak, Neb 268KFEY-Bunker Hill & Sullivan, Kellogg,

Idaho 233KFFP-lst Baptist Church, Moberly, Mo 242KFGQ-Crary Co., Boone, Iowa 226KFH-Hotel Lassen, Wichita, Kans 268KFHA-Western State College, Gunnison, Colo 252KFHL-Penn College, Oskaloosa, Iowa 240KFI-E. 0. Anthony Inc., Los Angeles, Cal 469KFIF-Benson Institute, Portland, Ore 248KFIO-North Central H. S., Spokane, Wash 266KFIQ-lst Methodist Church, Yakima, Wash 256KFIU-Alaska Elec. Co., Juneau, Alaska 226KFIZ-Daily Commonwealth, Fond du Lac,

Wis. 273KFJB-Marshall Elec. Co., Marshaltown, Ia 248KFJC-R. B. Fagan, Junction City, Kan 219KFJF-National Radio Co., Oklahoma City,

Okla. 261KFJI-E. E. Marsh, Astoria, Ore .246KFJM-University of N. D., Grand Forks 278KFJR-Ashley C. Dixon & Son, Portland, Ore 263KFJY-Tunwall Radio Co., Ft. Dodge, Iowa 246KFJZ-W. E. Branch, Fort Worth, Tex 254KFKA-State Teachers College, Greeley, Colo 273KFKU-University of Kansas, Lawrence, Kans 275KFKX-Westinghouse --Co., Hastings, Neb 288KFICZ-Chamber of Commerce, Kirksville, Mo 226KFLR-University of N. M., Albuquerque,

N. M. 254KFLU-San Benito Radio Club,- San Benito,

Tex. 236KFLV-Swedish Evangelist Church, Rockford,

IlL 229KFLX-George IL Clough, Galveston, Texas 240KFLZ-Atlantic Auto Co., Annita, Ia 273KFMR--Morningside College, Sioux City, Iowa 261KFMW-M. G. Sataren, Houghton, Mich 263KFMX-Carleton College, Northfield, Minn 337KFNF-H. Field Seed Co., Shenandoah, Iowa 461KFOA-Rhodes Company, Seattle, Wash 454KFOB-KFOB Inc., Burlingame, Cal 226KFON-Echophone Shop, Long Beach, Cal 2.33KFOO-Latter Day Saints University, Salt

Lake City, Utah 236KFOR-David City Co., David City, Neb 226KFOT7-College Hill Radio Club, Wichita, Kan 231KFOX-Technical High School, Omaha, Neb. 248KFOY-Beacon Radio Service, St. Paul, Minn. 252KFPL-C. C. Baxter, Dublin, Texas 252KFPM-New Furniture Co., Greenville, Texas 242KFPR-Forestry Department, Los Angeles, Cal. 231KFPW-St. John's Church, Carterville, Mo 258KFPY-Symons. Investment Co., Spokane, '

Wash. 275KFQA-The Principia, St. Louis, Mo 261KFQB-Searchlight Pub. Co., Ft. Worth, Tex 263KFQD-Chovin Co., Anchorage, Alaska 227KFQP-G. S. Carson. Jr., Iowa City, Ia 224KFQU-W. Riker, Holy City, Cal.., 273KFQW-F. C. Knierim, North Bend, Wash 216KFQZ-Taft Products Co., Hollywood, Cal , 226KFRB-Hall Bros., Beeville, Texas 248KFRC-City of Paris, San Francisco, Cal 268KFRU-Stephens College, Columbia, Mo. 500KFRW-Western Broadcasting Co., Olympia,

Wash. 219KFSD-Aldan Radio Corporation, San Diego

Cal. 246KFSG-Echo Park Evang. Assn., Los Angeles 275KFUL-T. Googan & Bro., Galveston, Tex 258KFUM-W. D. Corley, Colorado Springs, Col 240KFUO-Concordia Theo. Seminary, St. Louis,

Mo. 545KFUP-Fitzsimmons Gen. Hospital, Denver, 234KFUR-Peery Building Co.. Ogden, Utah 224KFUS-Louis L. Sherman, Oakland, Cal 256KFUT-Univ. of Utah, Salt Lake City, Utah 261KFUU-Coiburn & Mathewson, Oakland, Cal 220KFVD-C. & W. J. McWhinnie, San Pedro,

Cal. 205KFVE-Film Corp., St. Louis, Mo. 240KFVG-1st Meth-Epis. Church, Independence,

Kan. 236KFVI-56th Cay. Bridgade, Houston, Tex- 240KFVN-C. E. Bagley, Welcome, Minn. 227

Station Owner and Location MetersKFVS-Cape Girardeau Battery Station, Cape

Girardeau, Mo 224KFVY-Radio Supply Co., Albuquerque, N. M 250KFWA-Browning Bros. Co., Ogden, Utah 261KFWB-Warner Bros., Hollywood, Cal 252KRWC-L E. Wall, San Bernardino, Cal 211KFWF-St. Louis Truth Center, St. Louis 214KFWH-F. W. Morse, Jr., Eureka, Cal 254KFVVI-Radio Entertainers, Inc., South San

Francisco, CaL 220KFWIVI-Oakland Educat. Soc., Oakland, Cal 207KFWO-Lawrence Mott, Avalon, Cal 211KFWU-Louisiana College, Pineville, La 238KFWV-Wilbur Jarman, Portland, Ore 213KFICB-B. 0. Heller, Big Bear Lake, Cal 203KFXD-Service Radio Co., Logan, Utah 205KFXF-Pikes Peak Broadcasting Station Co ,

Cola Springs, Cola 250KFXH-Bledsoe Radio Co., El Paso., Texas 242KFXJ-Mt. States Radio District, Inc., (Port-

able), Col. 216KFXR-Classen Film Finishing Co., Okla

City, Okla. 214KFXY-Mary M. Costigan, Flagstaff, Ariz.- 205KFYF-Carl's Radio Den, Oxnard, Cal 205KFYJ-Houston Chronicle, Houston, Tex ,

(Portable) 238KFYO-Buchanan Vaugn Co., Texarkana,

Tex. 210KFYR-Hoskins Meyers, Inc., Bismarck,

N. D. 248KGAR-Citizen Pub. Co., Tuscon, Ariz 244KGBS-A. C. Dailey, Seattle, Wash 210KGBW-M. Brotherson, Joplin, Mo 283KGBX-Julius B. Abercombie, St. Joseph, Mo 348KGBY-A. C. Dunning, Shelby, Neb 203KGBZ-Federal Line Stock Remedy Co., York,

Neb. 333KGCA-C. W. Greenley, Deiorah, Ia 280KGCB-Wallace Radio Institute, Oklahoma,

Okla. 331KGO-General Electric Company, Oakland,

Ca. 361KGTT-Glad Tidings Tabernacle, San Fran-

cisco, Cal. 207KGU-M. A. Mulrony, Honolulu, Hawaii 270KGW-The Oregonian. Portland, Ore 492KGY-St. Martin's College, Lacey, Wash 278KHJ-The Times, Los Angeles, Cal 405KHQ-Louis Wasmer, Spokane, Wash 273KJBS-J. Brunton Co., San Francisco 230KJR-Northwest Radio Co., Seattle, Wash 384KLDS-Reorganized Church of Jesus Christ of

Latter Day Saints, Independence, Mo. 441KLS-Warner Radio Co., Oakland, Cal 250KLX-Tribune, Oakland, Cal 508KLZ-Reynolds Radio Co., Denver, Colo 266KMA-May Seed and Nursery Co., Shenan-

doah, Ia. 461KMJ-Fresno Bee, Fresno, Cal 234

239KMO-Love Elec. Co., Tacoma, Wash 250KMOX-Globe-Democrat, St. Louis, Mo 250KMTR-Echophone Mfg. Co., Hollywood,

Cal. 238KNRC-C. B. Juneau, Hollywood, Cal. 208KNX-Express, Los Angeles, Cal 337KOA-General Electric Co., Denver, Col 322KOAC-Oregon Agricultural College, Cor-

vallist, Ore. 280KOB-College of Agri., State College, N. M 349KOCH-Omaha Central High School, Omaha,

Neb. 258KOCW-Olcla. College for Women, Chickashia,

Okla. 252KOIL-Monarch Mfg. Co., council Bluffs, Ia 278KOWW-Frank A. Moore, Walla Walla, Wash 235KPO-Hale Brothers, San Francsico, Cal 429KPPC-Presbyterian Church, Passadena, Cal 229

Walla, Wash. 256KPRC-Houston Print Co., Houston, Tex 297KPSN-Pasadena Star -News, Pasadena, Cal 316KQP-H. B. Read, Portland, Ore 213KQV-Doubleday Hill Elec. Co., Pittsburgh 275KQW-First Baptist Church, San Jose, Cal 331KRCA-RCA, portable, San Francisco and

Los Angeles, Cal 305KRE-Gazette, Berkeley, Cal. 256KSAC-Kansas State Agricultural College,

Manhattan, Kans. 341KSD-Post Dispatch, St. Louis, Mo 545KSL-Radio Service Corp., Salt Lake City,

Utah 300KSMR-S. M. Valley R. R. Co., Santa Maria

Cal. 210KSO-A. A. Berry Seed Co., Clarinda, Ia 242KTAB-Ass. B'dc'sters,sters, Oakland, Cal. p3KTBI-Bible Inst., Los Angeles, Cal 294KTBR-Brown's Radio Shop, Portland, Ore 263KTCL-Bert F. Fisher, Seattle, Wash 306KTHS-New Arlington Hotel, Hot Springs,

Ark. 375KTNT-N. Baker, Muscatine, Ia 331KTW--Ist Presbyterian Church, Seattle, Wash 454KUOA-University of Ark., Fayettesville,

Ark. 300KUOM-State University of Montana, - Mis-

soula, Mont. 245KUSD-University of S. D. Vermillion, S. D 278KUT-University of Texas, Austin, Tex 231KV00-Voice of Oklahoma, Bristow, OklaKWCR-H. F. Paar, Cedar Rapids, Ia 278KWG-Portable Wireless Tel. Co., Stockton,

Cal. 248KWKC-Duncan Studios, Kansas City, Mo 236KWKH-W. K. Henderson I. W. and S. Co ,

Shreveport, La. 313KWSC-State College, Pullman, Wash 349KWUC-Western Union College, Le Mars, Ia 252KWWG-City, Brownsville, Tex. 278KYW-Westinghouse Co., Chicago 535ICZKZ-Electric Supply Co., Manila, P. I 270KZM-P. D. Allen, Oakland, Cal 240

Station Owner and Location MesersKZRQ-Far Eastern Radio, Inc., Manila, P. I. 212NAA-U. S. Navy, Arlington, Va 435WAAD-Ohio Mech. Institute. Cincinnati, 0 258WAAF-Drovers Journal, Chicago, Ill 278WAAM-L R. Nelson Co., Newark, N. j 263WAAW-Omaha Grain Ex.,- Omaha, Neb. 278.384WABB-Harrisburg Radio Co., Harrisburg,

Pa. 204WABC-Ashville Battery Co., Asheville, N. C 254WAB1-First Universalists Church, Bangor,

Me. 240WABO-Lake Ave. Bapt. Ch., Rochester, N.Y 278WABQ-Haverford College Radio Club, Haver-

ford Pa. 261WABR-Scotlt High School. Toledo. 0 263WABW-College of Wooster, Wooster, 0 207WABX-H. B. Joy, Mt. Clemens, Mich 246WABY-John Magaldi, Philadelphia, Pa 242WABZ-Coliseum Place Baptist Church, New

Orleans, La. 275WADC-Allen T. Simmons, Akron, () 258WAFD-A. B. Parfet Co.. Port Huron, Mich 275WAHG-Grebe Co., Richmond Hill, N. Y 316WAGM-R. L Miller, Royal Oak, Mich 225WAIT-A. H. Waite & Co.. Taunton, Mass 229WAIU-American Ins. Union. Columbus, 0 294WAMD-Radisson Co., Minneapolis, Minn 297WAPI-Alabama Polytechnic, Auburn, Ala 248WARC-American Radio Res. Corp., Medford

Hillside, Mass. 261WATT-Edison Co. (Portable), Mass 244WBAA-Purdue University, West Lafayette,

Ind. 273WBAK-State Police, Harrisburg, Pa. 276WBAL-Gas and Elec. Co., Baltimore, Md 246WBAO-James Millikia University, Decatur,

270WBAP-Star Telegram. Fort Worth. Tex 476WBAW-lst Baptist Church, Nashville, Tenn 236WBAX-J. H. Stenger, Jr., Wilkes-Barre, Pa 256WBBL-Grace Covenant Presbyterian Church,

Richmond, Va. 229WBBM-Atlas Investment Co., Chicago, III 226WBBP-High School, Petoskey, Mich 238WBBR-Peoples Pulpit Ass., S. Is., N. Y 416WBBS-1st Baptist Church, New Orleans, La 252WBBW-Ruffner City, Norfolk, Va. 222WBBY-Washigton Light Infantry, Charles-

ton, S. C. 268WBBZ-C. L Carrell, (Portable), Chicago, III. 216WBCN-Foster McConnell, Chicago, Ill 266WBDC-Baxter Co.,. Grand Rapids, Mich 256WBES-Bliss Electrical School, Takoma Park,

Mich. 222WBOQ-Grebe & Co., Richmond Hill, N. Y 236WBNY-Miss S. Katz, N. Y. C. 322WBRC-Bell Radio Corp., Birmingham, Ala 248WBRE-Baltimore Radio Ex., Wilkes-Barre,

Pa. 231WBRS--Universal Radio Mfg. Co., Brooklyn,

N. Y. 394WBT-Commerce Chamber, Charlotte, N. C 275WBZ-Westinghouse Co., Springfield, Mass 333WBZA-Westinghouse Electric and Mfg. Co ,

Boston, Mass. 242WCAC-Agricultural College, Mansfield, Conn 275WCAD-St. Lawrence University, Canton,

N. Y 263WCAE-Kaufman- & Baer, Pittsburgh, Pa 461WCAJ-Nebraska Wesleyan University, Uni-

versity Place, Neb. 254WCAL-St. Olaf College, Northfield, Minn 337WCAM-Galvin Radio Supply Co., Camden,

N. J. 236WCAO-Brager of Baltimore, Baltimore, Md 275WCAR-Southern Radio Corp., San Antonio,

Texas 263WCAT-School of Mines, Rapids City, S. D 240WCAU-Universal Broadcasting Co., Phila-

delphia, Pa. 278WCAX-University of Vermont, Burlington

Vt. 250WCBA-C. W. Heinbach, Allentown, Pa 254WCBD-W. G. Voliva, Zion, Ill. 345WCBE-Ubalt Radio Co.. New Orleans, La 263WCB1-1-University of Mississippi, Oxford,

Miss. 242WCBR-C. H. Messier (Portable), R. I 210WCBS-H. L. Downing (portable), Providence,

R. I. 242WCCO-Gold Medal, Station. Minneapolis, -St

Paul, Minn. 416WCK-Stix Baer & Fuller Co., St. Louis, Mo 273WCLO-C. E. Whitmore, Camp Lake, Wis 231WCLS-H. M. Church, Joliet, III 214WCMA-Culver Military Academy, Culver,

Ind. 259WCMB-Hotel Chapeau; Baltimore, Md. 229WCOA-Municipal Station, Pensacola, Fla 222WCRW C. R. White, Chicago, Ill - 240WCSH-Henry P. Rines, Portland, Me. 256WCWS-C. W. Selen, Providence, R. I 210WCX-Detroit Free Press & Jewett Radio andWDZ-J. L. Bush, Tuscola, III 278WDAD-Dod's Auto Accessories, Inc., Nash-

ville, Tenn. 226WDAJE-Tampa Daily News, Tampa, Fla 273WDAF-Kansas City Star, Kansas City, Mo 366WDAG-J. L Martin, Amarillo, Tex 263WDAH-Trinity Metr. Church, El Paso, Tex 268WDAY---Radio Equipment Corp., Fargo, N. D. 261WDBE-Gilham-Scohen Elec., Atlanta, Ga 278WBDJ-Richardson Wayland, Roanoke, Va 229WDBK-M. F. Broz, Furn., Cleveland, 0 227WDBO-Rollins College, Winter Park, Fla- 240WDBZ-Boy Scouts of Amer., Kingston, N.Y. 233WDCH-Dartmouth College, Hanover, N. H 250WDGY-Dr. G. W. Young, Minneapolis, Minn 263WDND-Dod's Auto Accessories, Inc., 160-

164 8th Me., N., Nashville, Tenn 226WDOD-Chatt. Radio Co., Chattanooga, Tenn 256WDZ-J. L. Bush, Tuscola, III 278VVDRC-Doolittle Radio, New Haven, Conn 268WDWF-Dutee Wilcox Flint, Cranston, R. I. 441WEAF-Broadcasting Company of America,

N. Y. City, N. Y 492

September 11, 1926 RADIO WORLD 17

WEBL-Radio Corp. of Ama. (Portable)WEBQ-Tate Radio Co., Harrisburg, IllWEBR-H. H. Howell, Buffalo, N.WEBW-Beloit College, Beloit, Wisc..WEBZ-Savannah Radio Corp., Savannah, Ga. 263WEE1-Edison Co., Boston, Mass. 349WENS-Robert E. Hughes, Evanston, Ill 203

WEMC-Emm. Missionary College, MerrienSprings, Mich. 286

WENR-All-Amer. Radio Corp., Chicago, Ill 266WEW-St. Louis University, St. Louis, Mo 360WFAA-Dallas News & Journal, Dallas, Tex. 476WFAM-The Times, St. Cloud, Minn 273WFAV-University of Nebr., Lincoln, Nebr 275VVFBC-1st Baptist Church, Knoxville, Tema 250WFBE-J. V. De Walle, Seymour, Ind 226WFBG-W F. Gable Co., Altoona, Pa 278WFBI-Galvin Radio Supply Co., Camden

N. J 236

WFBJ-St. Johns University, Collegeville,Minn. 236

WFBL-Onondaga Hotel, Syracuse, N. Y 252WFBM-Merchantsd. Lighting Co., Indianapolis,

In 268WFBR-Maryland National Guard, Baltimore,

Md. 254WFBZ-Knox College, Galesburg, DI 254WFCI-Frank Crook, Inc., Pawtucket, R. I 229VVFCL-Chicago Fed.. of Labor, Chicago, Ill 492WFDF-F. D. Fallain, Flint, Mich 234WF1-Strawbridge & Clothier, Philadelphia,Pa.395WFKB-F. K. Bridgman. Chicago, DI 217WFRL-R. M. Lacey, Brooklyn, N. Y , 205WGAI.-Lancaster Elec. Supply, Co., Lancas-

ter. Pa. 248WGBB-H. H. Carman, Freeport, N. Y 244WGBC-Ist Baptist Church, Memphis, Tenn 278WGBF-The Finke Furniture Co., Evansville,

Ind. 236WGBH-Fort Harrison Hotel, Clearwater, Fla. 266WGBI-Scranton Broadcasters, Inc., Scran-

ton, Pa. 240WGBR-Marshfield Broadcasting Association,

Marshfield, Wis. 229WGBS-Gimbel Brothers. New York, N. Y 316WGBU-Florida Cities Finance Co., Fulford

By -the -Sea, Fla. 278WGBX-University of Maine, Orono, Maine 234WGES-Oak Leaves Broadcasting Station,

Oak Park, III. 250WGHB-G. H. Boyles, Developments, Clear

water, Fla. 266WGN-The Tribune, Chicago, III. 303WGMU-A. H. Grebe & Co., Inc., Richmond

Hill, N. Y. 236WGCP-May Radio Broadcast Corp., Newark,

N. J. 252WGHB-G. H. Boyles, Clearwater, Fla 266WGHP-G. H. Phelps, Inc., Detroit, Mich 270WGMU-Grebe & Co., Richmond Hill, N. Y 236WGR-Federal Tel. Mfg. Co., Buffalo, N. Y 319WGST-Ga. School of Tech., Atlanta, Ga 270WGY-General Elec. Co., Schenectady, N. Y. 380WHA-University of Wisconsin. Madison, Wis. 535WHAD-Marquette Univ., Milwaukee, Wis 275WHAM-Eastman Sch. Music, Rochester, N.

Y. 278WHAP-Taylor Finance Corp., N. Y. C 431WHAR-Cook's Sons, Atlantic City, N. J 275WHAS-The Courier Journal -Times, Louis-

ville, KY. 400WHAV-Wilmington Elec., Wilmington, Del.. 266WHAZ-Rensselaer Institute, Troy, N. Y 280WHB-Sweeney School Co., Kansas City, Mo. 366WHBA-Shaffer Music House, Oil City, Pa. 250WHBC-Rev. E. R Graham, Canton, Ohio 254WHBD-C, W. Howard, Bellefontaine, Ohio 222WHBF-Beardsley Co., Rock Island, DI 222WHBG-John S. Skane, Harrisburg, Pa. 231WHEC-Hickson Elec. Co., Rochestr, N. Y. 258WHBJ-Laver Auto Co., Ft. Wayne, Ind 234WHBL-C. L. Carroll (Portable), Ill 216WHBM-C. L. Carroll (Portable), Chicago 233WHBN-lst Ave. Methodist Church, St. Pet-

ersburg, Fla. 238WHBP-Johnstown Auto Co., Johnstown, Pa. 256WHBR-Scientific E.Th3r M. Co., Cincinnati, 0. 216WHBQ-St. Johns Meth. Church, Memphis,

Tenn. 233WHBU-B. L Bing's Sons, Anderson, Ind 219WHBY-St. Norbit's College, De Pere, Wis. 250WHBW-D. R. Kienzle, Philadelphia, Pa 216WHDI-Wm. Hood Dunwoody Ind. Last ,

Minneapolis, Minn. 278WHEC-Hickson Elec Co Rochester, N. Y 258WHFC-Hotel Flanders, Chicago, Ill 259WHN-George Schubel, New York, N. Y. 361WHK-Radio Air Service Corp., Cleveland,

Ohio 273WHO-Bankers Life Co., Des Moines, Ia 526WHT-Radiophone Broadcasting Corp., Derr -

field. DI ' 400WIAD-H. R. Miller, Philadelphia, Pa 250WIAS-Home Electric Co., Burlington, Ia 254WIBA-Capital Times, Madison, Wis 236WIBG-St. Paul's E. P. Church, Elkins Park,

Pa. 222WIBH-Elite Radio, New Bedford, Mass 210WIBI-Frederick B. Gittell, Flushing, N. Y 219WIBJ-C. L. Carrell, Chicago, (Portable) 216WIBO-Nelson Bros., Chicago, Ill. 226

Station Owner and Location MetersWEAL-Cornell University, Ithaca. N. Y 254

WEAM-Borough of North Plainfield, NPlainfield, N. J. 261

WEAN-The Shepard Co., Providence, R. I 367WEA0-Ohio State University, Columbus, 0 294WEAR-Willard Storage Battery Co., Cleve-

land, 0. 390WEAU-Davidson Bros. Co., Sioux City, Ia 275WEBC-W. C. Bridges, Superior, Wise 242WEBD-Elec. Equipment & Service Co., An-

derson. Ind. 246WEBH-Edgewater Beach Hotel, Chicago, Ill 370WEBJ-Third Avenue R. R. Co., New York,

273226226244268

Station Owner and Location MetersW1BM Billy Maine, Chicago, 111. 216WIBR-Thurman A. Owings, Weirton, W. Va 246WIBS-Lt. T. F. Hunt, Elizabeth, N. J 203WIBU-The Electric Farm, Poynette, Wis 222WIBW-Dr. L. L. Dill. Logansport, Ind 220WIBX-WIBX, Inc., Utica, N. Y 234W1BZ-A. B. Truro, Montgomery, Ala. 231WIL-Benson Radio Co., St. Loins, Mo 273WIOD-Carl S. Fisher Co.. Miami, Fla. 248WIP-Gimbel Brothers, Philadelphia, Pa 508WJAD-Jackson's Radio Elec. Co.. Waco. Tex 353WJAF-J. A. Fenberg Radio Co., Ferndale,

Mich. 400

WJAG-Norfolk Daily News. Norfolk, Nebr 270WJAK-Kokomo Tribune Station, Kokomo,

lnd. 254

WJAM-D M. Perham, Cedar Rapids, Ia 268WJAR-The Outlet Co., Providence, R. 1 306WJAS-Pittsburgh Radio Supply House,

Pittsburgh, Pa. 275

WJAX-Voice of Jacksonville Fla 337WJAZ-Zenith Radio Corp., Mt. Prospect, 111. 322WJBA-D. H. Lentz, Jr., Joiiet, 111 207WJBB-L. W. McClung, St. Petersburg, Fla 254WJBC-Hummer Farm Co., La Salle, Ill 234WJBE-Financial Journal, St. Petersburg,

Fla. 254WJBI-R. S. Johnson, Red Bank, N. J 219WJBK-Ernest F. Goodwin, Ypsilanti, Mich. 233WJBL-Gushard Dry Goods, Deratur, Ill 270WJBO-V. Jensen, New Orleans, La 268WJBQ-Bucknell University, Lewisburgh, Pa. 211WJBR-Oinro Drug Store, Omro, Wis 228WJBT-J. S. Boyd, Chicago, Ill. 238WJBU-Bucknell University. Lewisburg, Pa. 212WJBV-Union Course Lab., Woodhaven,

N. Y. 470

WJBW-C. Carlson, Jr., New Orleans, La 341WJBX-Henderson & Ross, Ostezville, Mass. 280WJBY-Electric Construction Co., Gadsden,

Ala. 270

WJJD-Order of Moose, Mooseheart, Ill 370WJR-Detroit Free Press and Jewett Radio

and Phonograph Co., Pontiac, Mich. 517WJY-Radio Corp. of Amer., N. Y. C 405WJZ-Radio Corp. of Amer., N. Y. C., Bound

Brook, N. J 455WKAF-WKAF broadcasting Co., Milwaukee,

Wis. 261WKAQ-Radio Corp. of Porto Rico, San

Juan, P. R. 341WKAR-Mich. Agric. College, Lansing, Mich 286WKAF-WKAF Co., Milwaukee, Wis 261WKAV-Laconia Radio Club, Laconia, N. H 224WKBA Arrow Batt. Co., Chicago 288WKBB-Sanders Bros., Joliet, III 283WKBE-K & B Elec. Co., Webster, Mass 270WKBD-Frank V. Brenner, Jersey City, N. J. 235WKBF-N. B. Watson, Indianapolis, Ind 244WKBG-C. L. Carrell, (Portable) Chicago. ill. 216WKBH-Callaway Music Co., La Crosse, Wis. 250WKBI-Fred L. Schoenwolf, Chicago, Ill 220WKBS-H. L. Ansley, Birmingham, Ala 225WKBJ-Gospel Tabernacle, St. Petersburg,

Fla. 280WKDR-Edward A. Date, Kenosha, Wis 428WKRC-Kodel Rodin Corp., Cincinnati, 0. 326.422WKY-Hill Richards, Oklahoma City, Ok 275WLAL-1st Presbyterian Church, Tulsa, Okla. 250WLAP-W. V. Jordan, Louisville, Ky 275WLB-University of Minn., Minneapolis, Minn. 278VVLBL-Wisconsin Department of Markets,

Stevens Point, Wis. 278WLIB-Liberty-Weekly Inc., Elgin, Ill. 303WLIT-Lit Brothers, Philadelphia, Pa. 395WLS-Sears Roebuck Co., Chicago, Ill 345WLSI-Lincoln Studio Inc., Providence, R. I 441WLTS-Lane Technical H. S., Chicago 258WLW-Crosley Radio Corp., Cincinnati, Ohio 422WLWL-Missionary Society of St. Paul the

Apostle, N. Y. City 288WMAC-C. B. Meredith, Cazenovia, N. Y 275WMAF-Round Hills Radio Corp., Dartmouth,

Mass. 441WMAK-Norton Laboratory, Lockport, N. Y. 266WMAL-Leese Optical Co., Washington,

D. C. 213WMAN-1st Baptist Church, Columbus, 0 278WMAQ-Chicago Daily News. Chicago, Ill 448WMAY-Kings Highway Presbyterian Church,

St. Louis, Mo. 248WMAZ-Mercer University, Macon, Ga 261WMBB-Amer. Bond and Mort. Co., Chicago 250WMBC-Mich. Broadcasting Co., Detroit 256WMBF-Fleetwood Hotel, Miami Beach, Fla. 384WMBI-Moody Bible Institute, Chicago, 288WMC-Commercial Appeal, Memphis, Tenn 500WMCA-Hotel McAlpin, N. Y. C., Hoboken 341WMRJ-P. J. Prinz, Jamaica, N. Y 227WIVISG-Madison Square Garden B'dstg Corp ,

N. Y. C 303WNAB-Shepard Stores, Boston, Mass 280WNAC-Shepard Stores, Boston, Mass 430WNAD-University of Okla., Norman, Okla. 254WNAL-Omaha Central High School, Omaha,

Nebr. 258WNAT-Lenning Bros. Co., Philadelphia, Pa. 250WNAX-Dakota Radio App. Co., Yankton,

S. D. 244WNBH-New Bedford Hotel, New Bedford,

Mass. 248WNJ-Radio Shop, Newark, N. J. 252WNOX-Peoples Tel. Sr Tel. Co., Knoxville,

Tenn. 268WNIYC-Municipal Station, New York, N. Y. 526WOAI-Southeast Equip. Co., San Antonio,

Tex. 395WOAN-Vaughan Con. of Music, Lawrence -

burgh, Tenn. 233WOAW-Woodmen of the World, Omaha,

Nebr. 626WOAX-F. J. Wolff, Trenton, N. J. 240WOC-Palmer School of Chiro, Davenport, Ia. 484

Owner and Location'WO-ICI-Hotel Jamestown, Jamestown, N.

MetersY 275

WODAIT:D? Temple of Music, Paterson

WOI-Iowa State College, Ames, Iowa 270WOK-Neutrowound Radio Mfg. Co., Horne -

217wood, Ill.WOKO-Earl B. Smith, Patterson, N. J 233WOO-John Wanamaker, Philadelphia, Pa.- 508WOOD-Grand Rapids Radio Co., Grand

Rapids, Mich. 242WOQ-Unity School of Christianity, Kansas

City. Mo. 278

WOR-L. Bamberger & Co., Newark, N. J 405WORD-Peoples Pulpit Assn., Batavia, 275WOS-State Market Bur., Jefferson City, Mo.441WOWO-Main Auto, Ft. Wayne, Ind 227WPAK-N. D. Agricultural College, Agricul

tural College, N. D. 275

WPAP-Palisades Amusement Park, Clifford,N. J. 360

WPCC-N. Shore Congre. Church, Chicago 258WPDQ-H. L. Turner Buffalo, N. Y 205WPC-Municipality, Atlantic City, N. J 3130

WPRC-Wilson Radio, Harrisubrg, Pa 216WFSC-Penn State College, State College. Pa. 261WQAA-H. A. Beale, Jr., Parkersburg, Pa 220WQAC-Gish Radio Service, Amarillo, Tex 234WQAE-Moore Radio News Station, Spring-

field, Vermont 246WQAM-Electric Equipment Co., Miami, Ma. 263WQAN-Scranton Times, Scranton, Pa. 250WQAO-Calvary Baptist Church, New York,

N. Y. 360WQJ-Calumet Rainbo Broadcasting Co., Chi-

cago, III. 448WRAF-Laporte Radio Club. Wash., D. C 224WRAH-S. N. Read, Providence, R. I. 235WRAK-Economy Light Co., Escanaba, Mich. 256WRAM-Lombard College, Galesburg, Ill... . 244WRAV-Antioch College, Yellow Springs, 0 263WRAW-Avenue Radio Shop, Reading, Pa 238WRAX-The Berachah Church of Philadelphia,

Gloucester City, N. J. 280WRBC-Immanuel Lutheran Church, Val-

paraiso, Ind. 278WRC-Radio Corp. of America, Washington,

D. C. 469WACO- Radio Co., Raleigh, N. C 252WREC-Wooten's Radio Shop, Cold Water,

254WREO-Reo Motor Co.. Lansing, Mich. 286WRHF-Washington Radio Hospital Fund,

Wash., D. C 256WRHM-Rosedale Hospital, Minneapolis, Minn 252WRK-Doron Bros., Elec. Co., Hamilton, 0 270WRM-University of Illinois. Urbana, Ill 273WRMU-A. H. Grebe & Co., Inc., Motor

Yacht Mu I, N. Y. City 23$WRNY-Experimenter Pub, Co., N. Y. C 375WRR-City of Dallas, Tex 246WRST-Radiotol Mfg. First Ave

Bay Shore, N. Y 216WRVA-Laurus & Bros., Co., Richmond, Va 256WRW-Tarrytown Research Laboratory, Tar-

rytown, N. Y. 273WSAI-U. S. Playing Card Co., Cincinnati, 0 326WSAJ-Grove City College, Grove City, Pa 229WSAN-Allentown Call, Allentown, Pa 229WSAR-Doughty & Welch Elec. Co., Fall

River, Mass. 254WSAX-Zenith Radio Corp., Chicago, Ill 268WSAZ-Chase Electric Shop, Pomeroy, Ohio 244WSB-The Atlanta Journal, Atlanta, Ga.- 428WSBC-World Battery Co., Chicago, 258WSBF-Stix Baer and Fuller, St. Louis, Mo 273WSBT-South Bend Tribune, South Bend, Ind 275WSCO-Wittenberg College, Springfield, Ohio 248WSDA-7th Day Adventist Church, N. Y. C 263WSKC-World's Star Knitting Co., Bay City,

Mich.261WSM-National Life and Accident Ins., Nash-

ville, Tenn. 283WSBM-Saenger Amiss. Co., New Orleans 319WSMH-Shathick Music House, Owosso, Mich. 240WSMK-S. M. K. Radio Corp., Dayton, 0 275WS0E-School of Engineering, Milwaukee 246WSRO-H. W. Fahlander, Hamilton, Ohio 251WSSH-Tremont Temple Baptist Church,WSUI-State University of Iowa, Iowa City,

Ia. 484WSVS-Seneca Vocational School, Buffalo,

N. Y. 219WSWS-S. W. Straus & Co., Woodale, 275WTAB-Daily Herald, Fall River, Mass 266WTAD-R. E. Compton, Carthage, /31 236WTAG-Telegram, Worcester, Mass 545VVTAL-Toledo Radio & Elec. Co., Toledo, 0 252WTAM-Wilard Storage Batt. Co., Cleveland 389WTAP-Cambridge Radio Elec. Co., Cam-

bridge, III. 242WTAQ-S. Van Gordon & Son, Osseo, Wis 254WTAR-Reliance Radio Co., Norfolk, Va 261WTAW-Agricultural & Mech. College, Col-

lege Station. Tex 270 .WTAX-Williams Hardware, Streator, Dl 231WTAZ-T. 5. McGuire, Lambertville, N. J 261WTIC-Travelers Incur. Co., Hartford, Conn. 476WiJBO-V. Jansen, New Orleans, La, 268WWAE-Electric Park, Plainfield, Ill 242WAO-Michigan College of Mines, Hough-

ton, Mich. 263WWGL-Radio Engineering Corp., Richmond

Hill, N. Y. 213WW1-Ford Motor Co., Dearborn, Mich 266WWJ-Detroit News, Detroit, Mich 353WWL-Lovola University. New Orleans. La 275WWRL-Woodside Radio Lab., Woodside,

N. Y. 259

TABLE FOR CONVERSION OF FRE-OUENCIES AND METERS appeared in RADIOWORLD dated May 1, 1926. Sent on receipt of15c, or start your sub. with that number. RADIOWORLD, 145 W. 45th St.. N. Y. C.

18 RADIO WORLD September 11, 1926

Impromptu UncleSaved By Religion

Suddenly Called on to Entertain With Bedtime Story,He Takes a Remark of Dr. Cadman's as Cue

And Makes a Success

Do you know how it feels to be sud-denly called upon, thousands of milesfrom home, to face the mike and tell bed-time stories to the children of the radioaudience?

Only those who at some time have beenasked to say a few impromptu words inbroadcasting studio or elsewhere beforethe microphone can possibly picture sucha situation.

While visiting station 5CL at Adelaide,South Australia, Phil A. La Brie facedthis test. He visited J. L. Smallacombe atthe station in connection with some Fadaradio matters. Mr. Smallacombe is knownto the kids of his land as Uncle Radio.It was around 6' p. m. and the bedtimestories were on the air. Uncle Radio,King Electron and Auntie Peggy werehaving a great time and their listeners abetter one. While La Brie rested thebedtime stories went on apace.

"I sat there in front of a little table andsmoked my pipe," said Mr. La Brie. "AsI watched their antics I could not helpthinking that if the listeners -in were en-joying it as much as I, then this particu-lar period was undoubtedly a genuinesuccess. Comedy seemed to be at itsheight when, presently, Uncle Radio ex-claimed: 'Oh look! See who is with us,a great big Uncle from the United States.'And then he proceeded to give a descrip-tion of me.

"The next thing I knew Uncle Radiowas saying: 'Now, listeners -in, you willhear a few stories from Uncle Sam,' andthe microphone was placed on the tablein front of me. Both Uncle Radio andKing Electron left the studio. There Iwas, alone with the mike and AuntiePeggy, who remained at the piano.

"To make matters worse I had not beenintroduced to her. You will understandthe situation and my sense of lonlinessmuch better when I tell you that onedoes not get very far in South Australiasocially unless he is properly introduced.Formality is one of the necessities topromote social contact in this part of theworld. Glancing over in Auntie Peggy'sdirection got me no look of encourage-

ment from her. She kept her eyes righton the music in front of her.

"If ever there was a time when Ineeded a friend it was this particularmoment. There I had let my thoughtswander away on the rapid. comedy of theentertainers of the studio. I had swelledout at the description given of me andthought the idea of giving my dimensionsa very jolly one, to say the least. Theintroduction came so rapidly I had notgot out of my contemplative mood. Imight as well confess at this point thatnot only had I never before listened -inin my native country when the bedtimestories came over the air but actuallycould not recall having heard any whena kid myself. I actually suffered mikefright.

"And what do you think crashedthrough my brain all of a sudden? Aremark that I heard Rev. Dr. S. ParkesCadman make at the Young Men's Con-ference in Brooklyn, N. Y., over the airone night a long time ago! Yes, sir,religion came to my rescue. I don'tknow how I did it, but starting out withthe remark of Dr. Cadman I managed toput over a talk that was distinctly relig-ious in its nature.

"I talked and talked and when I hadbeen going along some time an announcerhanded me a slip of paper on which waswritten : 'You have four minutes to go.'

"I learned afterward that I had carriedon for thirty minutes altogether. Al-though I made a pretense at jumping onthe studio management for putting oversuch a stunt on me when I was unpre-pared, my wrath had subsided by thenext day when the mail brought fifteenletters asking for Uncle Sam to come onthe air again. The following day broughtthe total number of letters to 300."

As a result of the first talk and becauseof the increasing number of letters thatcame in, the station asked Mr. La Brie tocontinue his talks. He prepared a series,going on the air four evenings in succes-sion, and entertained the children andgrownups.The enjoyment was mutual.

Nibbling by MouseCostly to Financier

Trouble with growingly poor reception,Bertram Reinitz, of 127-A Clarkson Ave.,Brooklyn, N. Y., financier, botightset of six new tubes, total price $15. Noimprovement, so he put in two new vari-able condensers, at $10 a pair.

His A battery was 4 -volts, to feed type99 tubes, and the leads ran through thefloor from the cellar. One night whenhe went into the cellar to make sure thefamily casks of vinegar still were intact

his wife called to him that the set sud-denly had started to be scratchy again.He glanced at the battery leads in thecellar and there he saw a mouse nibblingthe insulated wire. The mouse evidentlyhad enjoyed almost nightly contacts withthe small current, like a child playingwith a shock machine. The wire wasweak from being nibbled. Riinitz fixedthis, totally shielded the leads, and radioserenity ensued.

A POPULAR QUAD

THE EVEREADY HOUR MIXED QUand a chain of stations, and who appearNew York City. Left to right, Charles e.

Rose Bryant, contralto, a

Casting RaiIs Bali

Players Must Not ExceedBe Given Audition to

Problems in Rao,!

The radio presentation of moving pic-ture scenarios, one of the features ofWJZ's Thursday evening programs forthe past six months, is more difficult thanwould appear on the surface, according toColonel C. T. Davis, who makes the adap-tations.

The movie scenarios, when received,cover a story requiring from one to three pi

hours, four to ten reels, to relate pie-torially. The cast of the movie is alwayslarger than that possible to use in theradio presentation.

The first task is to "boil down" the storyto a few scenes which will carry the fullthread of the -plot and not exceed twenty-five minutes. The number of charactersmust then be cut to not more than fourOr five, because with more than. that num-ber in a radio play the audience, usingthe sense of hearing only, are not ableto distinguish the characters by theirvoices, and become confused. When thesetwo things have been accomplished, thereal work starts.

The dialogue is written with the ideaof not wasting a word. With the radioadaptation completed, the casting isstarted. This is often the most difficulttask of all. Often fifty or more personsare tried for a single part.

.Although at most only four or five per-...11111111MillM11..

September 11, 1926 RADIO WORLD 19

1TET ON THE AIR

'ET, featured regularly from WEAF!ally at the Radio Industries Banquet,rrison, tenor; Betsy Ayres, soprano;

Ji Wilfred Glenn, basso.

Rio Play`ding Workf:ve, and Often 250 Mustlet This Number-led Movie Plots

tits are needed, each one must possessvoice typical of the part he or she is to

lay and at the same time the voice mustof be close enough in tone quality tonother voice in the same cast or con-qiion of the listeners will result.When the cast has been completed, the

''speakie" goes into rehearsal, at first only1;ialogue, and on the last four or five, thetriusical setting is rehearsed with the play.

rokenshire HonoredAt Seaside Pageant

Norman Brokenshire, one of radio's'lost popular announcers, was selected toerve as master of ceremonies and officialrenouncer at the Atlantic City Pageant,,.eld in Atlantic City on September 8, 9,nd 10. This was the first time in thestory of the pageant that a radio an-

)ouncer had been chosen for this import-ttAt work. Last year De Wolf Hopperii,rved in a similar capacity.R In selecting Mr. Brokenshire, of stationdVJZ, to fill this key position in the

ageant ceremonies, the committee was'iflucnced by the widespread popularityI the radio fans' idol, as he is referred

in broadcasting oircics.

Officials AlarmedOver Interference

Commerce Department Fears Trouble Unless Industry,Broadcasters and Public Unite to Obtain Legis-

lation-Hoover Declines to Head Union

WASHINGTON.Chairmanship of a permanent organiza-

tion of the radio industry, includingmanufacturers, broadcasters and the pub-lic, has been declined by Secretary ofCommerce Herbert Hoover.

Expressing the desire to see the crea-tion of such an organization which wouldhelp to relieve the threat of confusion thisWinter before the enactment of legisla-tion, Secretary Hoover nevertheless as-serted that it would be impossbile for himto accept the post.

The offer of chairmanship of the or-ganization was made to Mr. Hoover bythe Radio Section of the AssociatedManufacturers of Electrical Apparatus.

In the absence 'of Secretary Hooverfrom Washington, Acting SecretaryStephen Davis said he believed condi-tions might be very bad at the beginningof the radio season this Fall unless somesuch an organization begins to function.

Officials of the Department of Com-merce, while refusing to interfere in anyway, are daily becoming more concernedover the broadcasting situation. Withnew applications for licenses pouring intothe office of the Chief Radio Supervisor,prospects are that nearly 100 new stationswill take advantage of the Departmentof Justice ruling that under the existinglaw there is no authority for the limita-tion of stations or, allocation of wave-lengths.

Many complaints reached the Depart-ment of Commerce last Winter due tomany stations interfering with one an-other. At that time there was somesemblance of order and most of thepowerful stations enjoyed a 10 -kilocycleseparation from others.

With stations taking matters into theirown hands, the old 10 -kilocycle separa-tion scheme has been abandoned, and, forthat matter, so has every other rule de-vised for the elimination of interference.

Chief Radio Supervisor Terrell is al-ready preparing for the downpour of pro-tests or complaints of interference whichis expected when the season opens up.Mr. Terrell is contemplating havingprinted several thousand copies of a letterexplaining that the Department of Com-merce is powerless to do anything tohelp. It is expected to use this letter toanswer complaints of interference.

If reception this Winter proves as goodas normal, the former class B band willprobably be as congested as was theformer class A band. In such an event,fans may be able to obtain satisfactoryreception only from their local station.

Sets Were PopularWith Vacationists

LOS ANGELES.Letters from radio followers on vaca-

tions have been heavy, according to acheck made by KNX. Many more motortourists, it seems, took radio equipmentalong with them this year than everbefore.

Although Summer reception isn't con-sidered equal to that of Fall and Winter,some good distance reports have come in.In checking over the letters people inthe Owens River Valley have no difficultyin listening to KNX and other LosAngeles stations, it would seem from theglowing accounts that are given.

Kingdom for a WordTo Describe-er-ahemIs a saxophone player an artist?Is a ukulele player a musician?Is a tenor a performer?

These and similar questions are troubl-ing KFI, which is in search of a termthat will satisfactorily describe all who.perform nightly before the nation'smicrophones.

A term generally applied is "artist," butKFI hesitates to apply this term indis-criminately, The word "musician" does,not include all who have to deal with themicrophone, even when qualified as"radio musician," and, strictly speaking,"performer" cannot be used as a generalterns, since it suggests visual action, while"entertainer" lacks dignity.

Over a year ago KFI coined the word"receptionist," which has come into com-mon usage with the general betterment

of programs, it being undoubtedly un-dignified to refer to "fans" in the samebreath with a ,,Brahms concerto, while"listener" does not fully connote the veryimportant part that is being played inradio by the audiences of today. KFIbelieves that it will be necessary to coina word that will as aptly describe thepeople behind the microphone as "recep-tionist" does those before their loudspeakers.

"Microphonist," "microphoner," "micro-tician," and even, facetiously, "radiator"have been suggested. In this day of pun-gent and powerful additions to our mothertongue it should he a simple matter tofind the word it is looking for so KFIissues a cordial invitation to all two-fistedword coiners to join in the search for aterm that will properly enrich the Ameri-can language.

20 IZ ADIO WORLD September 11, 1926

A THOUGHT FOR THE WEEKTHEN a round -checked baby will clap

its pudgy hands on hearing the radioand a dear grey-haired old lady will at thesame time grow enthusiastic over a numberthat dims her eyes or makes them glowwith a new fire-then indeed have we aGod-given something that brings joy andcontentment into our more or less drab lives.

REG. U.S PAT. OFF.

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Entered as second-class matter March 28, 1922, atthe Post Office at New York, N. Y., under the Act ofklarch 3, 1879.

SHOW NUMBERSEPTEMBER 11, 1926

TURKEYGRAMSBy TIM TURKEY

An ice-cream cone is not a cone at allbut a horn.

*

The R. C. A. may sue Gertrude Ederleand Mille Gade, claiming that it has a

patent on swimming the channel.* * *

The thing to avoid at a radio show isto have the public come in simply to seecompeting manufacturers hand out cir-culars to one another.

* * *

Anybody with half an eye can light aquarter ampere tube properly withoutmatches or blowtorch.

* *

The Nobel prize ought to go to thefellow who designed the perfect 1 -dial

set.

All Hail the ShowTHE show is a well -established adjunct

of trade life today, because it givesthe manufacturers opportunity to displaytheir new wares, opens these products toquick and extensive public view, and en-ables members of the trade to meet oneanother to mutual advantage. In radiothe show plays a double purpose, in thatit deeply interests both the trade and thepublic at large, in the same way as doesthe automobile show.

This year there is only one radio showin the Borough of Manhattan, New YorkCity, the Radio World's Fair, at NewMadison Square Garden. The one thatwas to have been held competitively atGrand Central Palace was abandoned,under pressure of manufacturers, who sawno advantage in duplication, but onlydoubled expense. The booths, equipment,personnel, signs, folders, etc., constituteexpensive items, some of the largest man-ufacturers expending as much as $7,000 or$8,000 on these, so the motive for desiringonly one radio show is apparent.

The dates for the show in New YorkCity, September 13 to 18, were aptlychosen, because the event thus falls at atime when interest in radio has gained ahigh point, after the usual Summer re-tardation. The fact that all booths weresold long before the opening day, andthat the show and the concomitant In-dustries Banquet were eagerly discussedfor several weeks prior to the opening ofthese events proved again the felicitiouscircumstances.

Particularly this year has there beenmanifestation of a better spirit of co-op-eration among manufacturers. They arebeginning to realize that the success ofthe individual concerns hinges on the suc-cess of radio as an industry, and pettyconsiderations and personal advantageswere swept aside in the spirit of greatestgood for the greatest number.

These facts show that radio is rising toa higher plane and that the selfishnessand cunning that marked much of themerchandising in this field in years goneby are being supplanted by co-operationand goodwill. For a five -year -old in-dustry radio has accomplished a greatdeal and it is a satisfaction to record thenew spirit of friendly assistance thatmarks manufacturing enterprises in theindustry.

The Patent ChainTHE patent victory won by the Radio

Corporation of America, the GeneralElectric Company and the WestinghouseElectric & Manufacturing Company, withtheir Alexanderson patent, has an inter-esting bearing on the regeneration situ-ation, in which virtually the same partieslost out to Dr. Lee De Forest.

The case decided in Trenton, N. J., infavor of the three companies, and againstthe Splitdorf Electric Company, con-cerned the plaintiffs' patent, obtained byE. F. W. Alexanderson, now chief engi-neer for General Electric, for the couplingof multiple stages of radio frequencyamplification. Thus it is assumed thatany receiver consisting of more than onetube as the radio component (as distin-guished from the audio amplifier) wouldconstitute an infringement, unless alicense were obtained. The tuned radiofrequency set is particularly affected.

It so happens that the regenerative re-ceivers enjoying the greatest vogue con-sist of a stage of tuned radio frequencyamplification ahead of a regenerative de-tector, hence if Dr. De Forest is con-firmed in his rights as the inventor of re-generation, the limitation for practicalreceiver use might be to 1 -tube sets, fol-lowed by suitable audio, and this wouldstrike a heavy blow at the value of the re-

generation patent. Of course there aremany other uses for regeilt4ion notderogated by the decision in tltec,,,plitdorfcase either actually or inferentially.These include the transmitters used bystations and might even have some bear-ing on the Super -Heterodyne patents, de-pending on what court construction isplaced on the plate inductance or capac-ity, or combination thereof, found in theoscillator hookup of all Super -Hetero-dyne sets.

A comment occasionally heard when-ever the R. C. A. or any of its allied com-panies wins a patent victory is that thetrust is trying to monopolize radio. Buta patent is nothing if not a monopoly,and it is this monopolistic right thatpatent owners have sperkt_ their efforts ortheir good money to enjoy. The monop-oly ill restraint of trade mentioned in theanti-trust laws has nothing to do withthis, as the trust's position on patents hasbeen rather in promotion of trade thanin restraint of it, and the R. C. A. and its -allies have done more for radio as an in-dustry and have shown more decency asnon -infringers than all of their detractorsput together.

Tuning Through LocalsAN editor of one of the New York

newspapers recently purchased awell -made and efficient Neutrodyne, com-prising six tubes, but the set would nottune through powerful locals to bring indistant stations. The set owner had towait until the strong locals had signed offbefore he could get much DX, so hesought the advice of a service expert.The set was duly examined by the expert,who reported it was in fine condition, andthat inability to tulle through stronglocals was an inevitable condition. Thiswas a frank statement, but the set ownerremonstrated he had been led to believeotherwise from advertisements that themanufacturer had published in the verynewspaper on which the disappointenpurchaser was an editor.

It is asking too much to expect that therun of sets, especially the well -designedones, will tulle through powerful locals toget distant stations located on the tuningdial somewhere between these strongtransmitters. To accomplish that re-quires that the receiver's ability in sep-aration of stations be so great as to betoo great, for when selectivity is pressedbeyond a certain point you get distortion.Now, the set user does not want a re-ceiver that distorts for any reason. Cuttingoff side bands of the carrier wave by toomuch selectivity is a form of distortionparticularly hard to remedy. If the pur-chaser is so meticulous about his tubes,audio amplifier and speaker, so thatsounds will come from the speaker in anatural way, he does not want all hisefforts nullified by over -selectivity intro-duced ahead of the detector.

Yet when he demands that a set be ableto tune through strong locals in an air -congested area like the Metropolitan Dis-trict, he is asking for just such a re-ceiver. If the manufacturer led him toexpect too much the blame indeed restslargely on that source of misinformation."Incomplete advertising" is the soft im-peachment whereby' this condition isdescribed.

Public Be Served"Broadcasting is one industry that is

based entirely on the slogan, 'The PublicBe Served and Pleased,' and public pro-test against biloadcasters whose wavechoice is unfortunate will immediatelyand automatically correct any troublesthat may arise while stations are experi-menting with new wavelengths."

-Frank Reichmann.

September 11, 1926 R. A D10 W OR L D 21

St-:inmetz's Testsof High Voltages

Next to the Last Chapter of Great Scientist's Life Tellsof His First Experiment with a 220,000 -Volt

Transformer-Glimpses at Family Life

[Earlier chapters of the interesting lifeof Charles P. Steinmetz, great electricalscientist, were published in the four preced-ing issues. Next week the biography will becompleted. The death scene will be de-picted.]

By John W. HammondFor nearly ten years before Steinmetz

first took up the question of transmission,the transformer and the multi -phase dis-tribution system had caused the alternat-ing current to become universal for long-distance work. The demand for elec-tricity for power as well as for lights hadbeen successfully met by the multi -phasesystem, as it offered an easy engineeringmethod for operating both lights andmotors from the same circuit.

As desirable transmission distances in-creased, the voltage had to be increasedlikewise, in the interests of economy. Andthen new problems arose. The size andcharacter of the copper transmissioncables became an important matter, as athigh electrical pressures corona losseswere encountered.

Current LeakageA certain proportion of the electric cur-

rent would leak out from the cable, sothat some of the electrical energy whichstarted from the generator would he loston the way. It would disappear, :nsteadof going into the electrical apparatus atthe receiving end, to perform work.

Another problem arose as soon as en-gineers tried to send electric current athigher voltages. In the generating sta-tions where the step-up transformerswere located, it was noticed that the elec-trical apparatus of the station was dis-turbed by current, leakage.' This becameserious in some of the larger stations,threatening to upset entire systems, espe-cially when sub -stations were connectedto the main generating stations.

Dr. Steinmetz began working on theseand similar problems with much energy.He helped establish a special trainingcourse at the General Electric works,where engineers could study the subjectof transmission.

An experimental transformer was setup, which operated at 220,000 volts, thefirst time such a high voltage had everbeen tried anywhere. He visited powerhouses in some of the big cities, likeChicago, where the demand for electricitywas growing very fast, and where, con-sequently, the problems were becomingserious.

Invents Transmission MethodFinally Dr. Steinmetz, after a number

of years of study, invented an entire sys-tem of electric current transmission. Thissystem worked well: it cleared up quitea few of the problems which had previous-ly been puzzling the engineers.

Steinmetz continued to amaze his fellowengineers by his remarkable mathematicalability. He could carry the table of log-arithms, one of the most important andcomplicated tables of higher mathematics,in his mind.

Because of his astounding mathemat-

ical achievements, and because of thetremendously valuable work he was do-ing, people began to call him the "Wiz-ard of Schenectady." Others called himthe 'little giant."- Everyone recognizedhim as an engineering and scientificgenius.

Rises to Higher PlanesSlowly, yet unmistakably, his wonder-

fully useful life was building itself higherand higher-a tower of splendor for allmen to see and feel better for having seenit.

Meanwhile, throughout 1902 and dur-ing more than half of 1903, the work ofbuilding Dr. Steinmetz's new residence onWendell Avenue went forward.

When finally finished, the house waslarge and imposing. It seemed to be thespecial desire of Dr. Steinmetz that itshould have an abundance of space. Per-haps the most interesting part of thehouse was the private office and museumof Dr. Steinmetz.

He had a fine collection of rare post-age stamps, for some of which he hadpaid a good deal of money. He had col-lections of geological specimens, ironores and minerals : of Indian flint arrow-heads and curious smooth stones, pebblesand sea -shells; of old note -books, hourglasses, incandescent lamp bulbs, curioustoys and some fine examples of carving.

He was an enthusiastic photographer.For twenty-five years he took pictures athim home and his camp. He had betweeneight hundred and a thousand photographnegatives, all carefully filed away in en-velopes.

A House of CharmMr. and Mrs. Hayden, after their wed-

ding trip, lived in a flat not far from Dr.Steinmetz's home. They had hardly beenback two days before Dr. Steinmetz cameover to see them. All that summer hefrequently visited the Haydens in theirhome. Then one day in the early fallhe invited them over to see his new resi-dence. He took them all through thedifferent rooms, and they found it indeeda charming house. While they werespeaking of its attractive appearance, Dr.Steinmetz suddenly remarked:

"Why don't you both come here tolive, We shall all have a home here to-gether. It will be pleasant for everyone."

The suggestion was quite a surprise toMr. and Mrs. Hayden. And yet it seemedthe most natural thing to do, and theywere really attracted by the house. Sothe end of it all was that they did gothere to live.

That is how Dr. Steinmetz came tohave a home ,after living as a bachelorwith a few friends in a knock -about man-ner for nearly fifteen years.

His Family CircleFrom this time until his death he always

had a family circle. And the happiestperiod of his life was during the yearsthat the three Hayden children weregrowing up, calling him "grand -daddy,"and letting him join in their good times.

It is most interesting to observe thatalthough he received a larger salary than

A TROUBLE LAMP

A SMALL 3 -volt lamp mountedon a stick suitably connected to drycells gives a handy light when work-ing in a set on trouble shooting.

almost any other engineer of the Gen-eral Electric Company, yet never in hiswhole life did he ask for big pay.

Had he done so, doubtless he wouldhave received such pay. The GeneralElectric Company, or any other com-pany, would have paid him as muchmoney as he wished, because of his tre-mendous usefulness to the company. ButDr. Steinmetz never asked for more thanhe actually needed. It seems clear thathe would not have taken more.

For fully twenty years of his life, Dr.Steinmetz studied lightning. In makingthis study, he was trying to discover thecause of sudden, unexpected high -voltagecurrents that caused damage to the elec-trical machines in power houses and tothe cables of transmission lines, unlessthey can be prevented.

He found that lightning was one of thecauses of such destructive currents. Light-ning does not often actually strike anelectrical transmission system. But it maycome so close to the wires that it causeswhat is known as an "induced current" inthe electrical system, which is a muchgreater current than the system canstand without breaking down.

Dr. Steinmetz found that althoughlightning was often the original cause ofdisturbances on electrical systems, the ac-tual damage and destruction was not doneby the lightning. It was done by the elec-trical energy of the system itself, pro-duced by the electric generators in theregular way. This line energy wouldbreak its bounds, or get out of control,when lightning occurred within a certainradius of the system.

As electrical systems increased and theenergy which they handled grew fromthousands of horsepower to tens of thou-sands, and from tens of thousands tohundreds of thousands, it became neces-sary to protect them from lightning inthe most reliable manner that could bethought out.

(Broadcast by WGY)

fs

22 -RADIO WORLD September 11, 1')26

300 Exhibit at ShowAt a Cost of $150,000

Radio World's Fair, Greatest Exposition of Industry,Attracts Attention World Over-Great Business

to Be Transacted There, Says Irwin

By Eric H. PalmerHundreds of thousands of persons

awaited the first glimpse of the marvel-ous new radio receivers and accessoriesdesigned to meet the expanding needs ofthe radio public for bringing home the deluxe entertainment that will be on theair in the future. All these sets, hun-dreds of them, with all that pertains totheir operation, are shown under a singleroof during the one week Radio World'sFair in New Madison Square Garden,New York City.

It is a spectacle to evoke genuine en-thusiasm not only because of the ad-vanced designs of the apparatus, but be-cause cf the picturesque setting underwhich 1927 Radio will make its officialbow. Every indication is that the RadioWorld's Fair is the greatest radio exposi-tion ever held in New York.

It ,Is InternationalThe Radio World's Fair, as the name

indicates, is international in scope. Feat-ures of interest across the Atlantic andPacific Oceans are staged, and of courseAmerica leads the world in the produc-tion of efficient receivers, as it does inbroadcasting. Representatives of a dozenforeign governments and many foreignconcerns are present to witness the dis-play and to participate in the events.

Every state in the Union and everyprovince in Canada appears in the regis-tration book of visiting experts and mer-chandisers.

Above all, from the standpoint of publicinterest, the exposition is the openinggun in the radio year. What happenswithin the spacious auditorium is con-veyed to 10,000,000 listeners by radio, 20stations standing by to transmit the en-tertainment by notable artists and famousmen and women in the political, theatri-cal and business life of the nation.

There are 300 exhibits at the RadioWorld's Fair. All the prominent radiomanufacturers of the United States dis-play their new sets and accessories. It iscalculated that each exhibit represents anexpenditure, on the average, of $5,000.More than $150,000 has been expended inpreparing for the exposition and for theactual construction and decoration of theimmense arena and exposition halls inNew Madison Square Garden.

More RoomThe new Garden provides about 30,000

more square feet for the purpose of theRadio World's Fair than were available inold Madison Square Garden, where thefirst Radio World's Fair was housed, withoverflow exhibits at an adjacent armory.

Additional space than which ordi-narily is provided has had to be fur-nished through the boarding over of sev-eral thousand seats alongside the arenafloor. About 40 exhibits are housedunder these unique conditions. To takecare of these extra exhibitors, $20,000 haspeen spent. All this was made necessarybecause for the first time since the radioindustry became one of America's great-

est there is only one national radio expo-sition in New York.

In 1924 and 1925 there were two showsheld simultaneously, at great inconveni-ence to the public and very large extraexpenditures to the industry.

All this has been done away with bythe action of the industry in uniting withthe Radio World's Fair as its principalexposition.

Only One National ShowA show was originally scheduled for the

Grand Central Palace under the auspicesof the Radio Exhibition Corporation, butafter a serizs of conferences between therepresentatives of this corporation andthe Radio Manufacturers Association, astatement was issued by George A. Sco-ville, president of the Board of Directorsof the Radio Exhibition Corporation, ask-ing that all exhibits be shown in oneplace. Every effort has been made byRadio World's Fair management to takecare of the extra responsibilities entailed.

Thus, Radio World's Fair is not onlythe official exhibition of the Radio Manu-facturers Association, as in past years, butrepresents all manufacturers in the in-dustry that are not actually affiliated withthat organization.

The public thus gains by viewing all theexhibits in one location and for a singleprice of admission.

Nine months have been spent in arrang-ing details of the show and the mostelaborate program in the history of radiohas been worked out.

It begins with a parade on the morningof September 43 down Broadway to CityHall, New York City, where MayorWalker reviews the procession and greetsthe visiting manufacturers and specialguests of honor.

Heading the procession is a portablebroadcasting station 6XBR, owned byWarner Brothers, motion picture produc-ers. A program broadcast from this mo-bile station is retransmitted by WFBH,the Hotel Majestic station. 6XBR, whichsends on a wave of 102 meters, has beenheard in almost every state and provincein Canada and also in England.

Mrs. Harrauff's RecordMrs. Lotta Harrauff of Princeton, Ill.,

Queen of America Radio for 1926-7, willbe received by Mayor Walker. She willbe special guest of honor at the RadioWorld's Fair.

She will fly on Sunday morning, Sep-tember 12, from her home to Chicago, ina specially engaged airplane, and boardthe Twentieth Century Limited with hersecretary, Miss Todd Beyer. Before sheleaves she will be the guest of the peopleof the city of Princeton, where her hus-band is postmaster and where she hasbeen leader in cultural circles for manyyears.

The American radio public is alreadyfamiliar with Mrs. Harrauff and her won-derful success in broadcast reception, notonly because she has been announced asa winner of the annual Radio World'sFair competition among feminine fans,but because she has broadcast her senti-

HERALDS BIG EVENT

PORTABLE broadcasting station6XBR, owned by Warner Bros.Pictures, Inc., heads the parade ofthe radio industry through Broadway,New York City, in connection withthe opening of the Radio World'sFair in New Madison Square Garden.A special program was broadcastwith some celebrated announcers atthe microphone of this mobile station.

ments with regard to the merits of radioin the interest of the American home,over stations WMCA, WOC, WGR,WTAM, and others. Her talented daugh-ters, Helen and Melvira, have appearedon the same programs in song and in-strumental selections : Thus the familyrepresents a home typical of the benefitsthat radio is bringing to the people ingeneral, the underlying reason why shewas selected for the honor of being "Mrs.Radio."

The opening ceremonies at the RadioWorld's Fair will be transmitted byWLWL, WEAN, and \VNAC. GovernorAlfred Smith will officially declare the ex-position open. He will present the silvertrophy to Mrs. Harrauff, and bestow hisofficial congratulations upon Arthur T.Haugh, President of the Radio Manufac-turers Association, and upon U. J. Her-man and G. Clayton Irwin, Jr., co -direct-ors of the exposition. President Louis B.F. Raycrof t of the Radio Section of theAssociated Manufacturers of ElectricalSupplies will be on hand to represent themembers of that organization.

An extraordinary entertainment pro-gram will be a feature. In the limelightwill be a famous crooner of southernsongs, Miss Caroline Lee, winner of thirdprize in the Radio Queen Contest, who isanother guest of honor and will be heardlater on in the week through stationWRNY in a special concert.

Of very special interest is the interna-tional amateur set building test.

England accepted the challenge to showits finest home -constructed sets. Twenty-seven of the finest have been sent here,following elimination contests held in Lon-don. They will be judged for efficiencyand beauty of workmanship alongside atleast one hundred five radio sets built byAmerica enthusiasts, including severalgirls.

$100,000,000 Business"About $100,000,000 worth of business

will be done at the Radio World's Fair,"declares General Manager Irwin. "Wecount on an attendance of 10,000 dealersand jobbers. Estimates of radio businessnext year run to $600,000,000. Big gainsare being made in the export of Ameri-can sets, parts, and accessories, despiterestrictions in several countries."

September 11, 1926 RADIO WORLD 23.

THE RADIO TRADE

R. C. A. Wins SuitAgainst Splitdorf

Gets Injunction and Order for Accounting of ProfitsTuned Radio Frequency Set Held to Infringe

Alexanderson InventionTRENTON.

The Radio Corporation, the GeneralElectric Company and the WestinghouseElectric & Manufacturing Company,petitioners, as owners of a licensees underthe Alexanderson coupled radio frequencypatent, won the suit instituted againstthe Splitdorf Electrical Company. FederalJudge Bodine handed down the decision.

The inventor of the coupling was E. F.W. Alexanderson, now General Electric'schief engineer. The patent was grantedin October, 1913, hence has four years torun. It relates to the coupling of oneradio frequency stage to another and ap-

plies, it is said, to all RF receivers, espec-ially the popular tuned RF sets in usetoday.

The court ordered the defendant to

cINIeW and I'mproved

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Tested and Approved by Herman BernardNEEDS NO ADJUSTMENT. SEE IT AT THE SHOW, GET IT FROM YOUR DEALER OR DIRECT FROM US.General Resistor Co., Inc. 190 Emmett St., Newark, N. J.

IMPROVEYOUR RADIO RECEPTION.

BY USING

A strong hand -turned rock maple pole whichgives a quick, convenient method of erectinga dependable antenna - 5 or 8 foot lengths,will fit any roof-single or multiple wireantennas. Will carry the heaviest sleet cov-ered antenna In strong wind without weak-ening. Neat In appearance. Can be set upor dismantled without danger of causingleaks In roof. Complete sot Includes threesteel guy rods Vs' in diameter, adjustable,pulley, nob irons, roof sockets, anchor pinsand full instructions, price 5 foot mast,each $3.50. 8 foot mast. each $4.25. Askyour dealer.

MILPirr PI IG-APS.The WAVE -R Condensing Antenna is anaerial that can be quickly erected onwall, chimney or roof, anywhere 5 footsquare is available. Several on one roofwithout interference. Provides sharpertuning. increases selectivity and Is non -directional. Twelve durable highly con-ductive, non-corromive looped aluminum wirefeelers reach out In all directions. Per-fectly insulated to prevent losses. Onlyone upright to erect, only a hammer and ascrewdriver needed. No. 2, with 8 tootpolo ready to install with all accessoriesand full instructions $12.50. No. 3, farside wall or chimney motmtIng $12.50.DEALERS ---There's a big demand every-where Inc EMI -MAST and WATE-X-write for our dealer saes plan noon

ZINKE CO. PRESSED METALChicago, Ill. MFG. CO.

Waukesha, Wis.

REERADIO

CATALOGSpecial SummerBargain Bulletin

Parts, accessories, kitsand sets-all the best andthe latest. A $1,000,000.00Radio Stock to choosefrom. A copy of thisunusual catalog isyours for the asking.Just drop us a line-now.

DEPT. R.W.

CHICAGO SALVAGESTOCK STORE

509 S. State St., CHICAGO, U. S.A

make an accounting of profits and issuedan injunction.

It was contended by the petitioningcompanies that they hold exclusive patentrights on the tuning systems now in gen-eral use on radio sets. Alexanderson,

(Co/cell/AV o/c page 24)

It Makes A Great DifferenceThe Best Aerial Wire Money Can Buy!-For RentDistance -75 feet long-large soft drawn enameledcopper wire wound with l,000 fret of copperwire. You Will Be Surprised at tho Results.C. 0. D. $5.00, Plus Postage. Money back if itdoes not deliver results. YOU be the judge!WOUND AERIAL WIRE CO., Reedville, Va.

When you see this trade -mark on a con-denser or resistor, you know that all thequestions were taken out of it before it wasput on sale.

Used by The Browning -Drake Corporationand National Companies as standard.

Tobe Deutschmann Co.Engineers and Mann f actswer.r

Cawbridge, Mass.

"RAMBLER -SIX"THE ONLY

REALPORTABLE $90

withouttubes Or batteries

Satisfaction GuaranteedWRITE FOR KIT PRICES

APPrOVed by Radio World Laboratories

American Interstate Radio Service183 Greenwich Street, New York City

DIstributors,JObbers,Dea/ers,write to special trade terms

LIMITEDTIME OFFER!

Fora limited time only, genuineWorld Storage Batteries can begotten at actual cost. Everycent of profit has been cut outin order to keep our full factoryorganization busy during theslack season. Prices below arelowest in history.

World Batteries are nationallyknown for dependable, longwearing performance. SolidRubber Case prevents acidand leakage.

Send No Money!Just state battery wanted and wewill ship same day order is received,by Express C.O.D. subject to exam-ination on arrival. 6% discount forcash in fall with order. Send yourorder naw and get your World Bat-teries at actual manufacturing cost.

WORLD BATTERY COMPANY1 So. Wabash

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IKDKA WSBC WEAF a KY W

ri

24 RADIO WORLD September 11, 1926(Concluded from rooc Li i

they alleged, sold his rights to the GeneralElectric Company. The latter concern,contended the petition, licensed the RadioCorporation to manufacture and sell theinvention.

The Splitdorf Company was accused ofembodying the device in a radio setknown to the trade as Type R-500.Answering that contention the Splitdorfexecutives argued that the system was inpopular use prior to the Alexandersonpatent and sought to show that thepatent did not comply with Federalregulations. It was further asserted thatthe Splitdorf Company was licensed bythe United States Navy Department andand that the use of the disputed systemwas under that license.

"Of course," said Judge Bodine in dis-missing the latter contention, "the cir-cumstance that defendant has a licensefrom the Navy Department to use theSchloemilch and von Brook patent (alater patent) does not avoid infringementof the patent in suit."

NM PATENT YOUR IDEAS NIInventions developed. Patents secured in theU. S. and Foreign countries. Satisfactory Terms.Wt.,de, call or phone HANOVER 3662 for con-lidoorinl voter and 'invention Recording Blank.

l\tir 'ILVol..01,4,40-,10,1,11.T PEi.

C ...,-.oil; i ,,,.-7

Te l'11:F,

.' . ' . c:. =Y44 T

0NS

Z.11. POLACHEKPAETPTgRTNEN70 WALL ST. -NEW YORK %Mg ID

NATIONin name

NAT -ONin fact

L

CAS L

There is not a small corner of this UnitedStates in which NATIONAL Browning -Drake Radio Frequency Transformers,NATIONAL Velvet Vernier Dials andNATIONAL Variable Condensers are notknown and appreciated. This really appliesto the whole world.

You can draw your own conclusionsabout the popularity of NATIONAL RadioSet Essentials. Ask anyone that uses them.

Send for Bulletin 116-RW. Be sure youget genuine NATIONAL products.

NATIONAL COMPANY, INCEngineers and Manufacturers

W. A. READY, President110 Brookline Street Cambridge, Mass.

Frost Is HonoredAt Far well BanquetThe place of radio in the American

home and the part the Middle West hasplayed in the development of the industrywere points stressed in an address byMajor Herbert H. Frost, past president ofthe Radio Manufacturers' Association,and General Sales Manager of E. T.Cunningham, Inc., at a banquet in hishonor at the Palmer House, Chicago.

This occasion, which was sponsored bytwenty-one radio trade organizations,was a farewell by more than 200 membersof the radio industry in the Middle Westto Major Frost, who recently removed toNew York.

Paul B. Klugh, executive chairman ofthe National Association of Broadcasters,presided. Among the speakers were: A.J. Carter, president of the Carter RadioCompany; Frank E. Watts, general man-ager of "Electrical Goods"; Curtis C.Wessel, editor, "Phonograph & TalkingMachine Weekly"; Colonel A. C. Clifton,Signal Corps U. S. Army, and Harold J.Wra.pe, president, Federated RadioTrades Association.

Major Frost received a handsome silverloving cup from his many friends in theradio industry and was also presentedwith a sabre by the American SignalCorps Association, of which he is amember.

THE 1 9 2 7

vE,r_witThe something big in radio youhave been waiting for is here.

Published exclusively in

The Radio Man's Magazine249 West 53rd St., New York, N. Y.

EISF' Your Copy is Ready!Send us twenty-five cents.

CONSTRUCTION OF RADIO PHONE ANDTELEGRAPH RECEIVERS by M. B. Sleepersent on receipt of 75c. Guaranty Radio Goods Co.,145 West 45th Street, New York City..

Fresh an IntroducesH is Supreme Effort

The distinctively beautiful Freshmanconsole known as the 6 -F -I1 is the captiv-ating product of the Chas. Freshman Co.,Inc. Built in a richgrained mahoganyhaving a soft andalluring finish andequipped with a li-censed cone typespeaker, designed es-pecially to reproducethe exceptional qual-'ity and volume ofthe new and im-proVed receiver, thiscreation has beennamed "The Master-piece of Master-pieces." CHAS. FRESHMAN

The receiver itselfhas been designed to employ the newR. C. A. power tubes, with the resultthat great volume with wonderful clarityof reproduction is the outstanding feat-ure. In conjunction with the A -B -CPower Supply unit which the FreshmanCo. manufactures, the console can beoperated from the light socket.

The mellowness of tone is called reallysurprising, the lower notes being broughtout with fidelity, thus enriching thereproduction until it is realistic. Itis Freshman's supreme achievement in theradio field.

BUILD 'EM YOURSELFWith our Kit of Parts you caneasily and quickly build a setfour powerful, compact, real D.X. Transformers at home and savehalf the cost.

INTERMEDIATET ANSEORMERS

All coils, Silicon Steel Laminations,Cases, Terminal Plates, Screws,Nuts, Filter Condenser Instruc-tions, Etc.,-Matched Coils.

$12.00 Postpaid

RADIO CONSTRUCTORS' SERVICE150 Glendale Blvd.

LOS ANGELES, CALIFORNIA

I -

SUMMER PREMIUM SU SCRIPTION OFFERFor NEW RADIO WORLD Subscribers Ordering NOW

Radio World has made arrangements This is the way to get two publications-To offer a year's subscription FREE for anyone of the following publications with me year'ssubscription for RADIO WORLD

-RADIO NEWS or-BOYS' LIFE

DEALER or-POPULAR RADIO or -RADIO (San Francisco) or-SCIENCE AND INVENTION or -RADIO AGE .

-for the price of one: -Add 51.00 a year extra for-Send $6.00 today for RADIO WORLD -Canadian or Foreign Postage.-for one year (regular price) -Present RADIO WORLD subscribers-for 52 members) -can take advantage of this offer by-and select any one of the other -extending subscriptions one year-nine publications for twelve months. -if they send renewals NOW!

RADIO WORLD'S SPECIAL TWO -FOR -PRICE -OF -ONE SUBSCRIPTION BLANKRADIO WORLD, 145 West 45th Street, New York City.',closed find $6.00 far which send me RADIO WORLD for twelve months (52 numbers), beginningand also without additional cost, Popular Radio, or Radio News, or and Invention, or Radio Dealer, or Radio (San Francisco), or Radio Age,or Boys' Life (or $10.00 for two yearly subscriptions.) (No other premium with this offer.)

Indicate if renewal.Offer Good UntilSept. 15, 1926

Name

Street Address

City and State

September 11, 1926 RADIO WORLD 25

Bruno AnnouncesDrum Control Series

The Bruno Radio Corporation, 20Payntar Avenue, Long Island City, N. Y.,has just placed on the market a drumtuning control, in conjunction with acomplete set of already assembled mod-els built around this control. The lineis known by the trade name Unitune. Thebasic structure is the pair of drums totune two condensers, mounted withshafts to left and right, instead of for-ward. The Bruno quartzite 99 RF and 3 -circuit coils and the Bruno .0005 mfd.straight line frequency tuning condensersare the other adjuncts used in the fac-tory assemblage of the models.

A bronze panel plate is furnished withall the models, except the pair, of drumswhen obtained alone, but even with thesemounting frames are supplied. A descrip-tion of the new line, one of the few lineson the market making drum control avail-able to home constructors, follows :

Unitune Model 2C-Two Bruno .0005mfd. straight line frequency tuning con-densers, insulated from each other elec-trically, but mounted on an aluminumframe; pair of drums that emerge througha slot in the front panel; embossedbronze panel plate. The drums are sep-arately constituted, but vary on 10 de-grees from each other, obviating any needfor small sequalizing condensers for uni-fied tuning.

Unitune Model RF-Consists of Model2C, plus two Bruno 99 RF transformers,completely assembled electrically andmechanically. Wave range, 200 to 550meters, exceeding the broadcast band.

Unitune Model TK-Consists of model2C, plus One Bruno 99 RF transformerand one Bruno 3 -circuit tuning coil. Asmall knob will actuate the rotor.

Unitune Model CF-Consists of same asmodel TK, except that the 3 -winding coil

has a fixed tickler coil, which may betuned or otherwise affected by a variablecondenser, or governed by a variable re-sistance.

The Unitune Model CC is differentfrom the others, consisting of one left-hand condenser, controlled by the leftsection of the split drum control, and aBruno three circuit tuner, whose ticklershaft is controlled by the other section.This is a whole high amplification re-ceiver unit, requiring only the usual ac-cessories such as sockets, fixed condens-ers, etc., to make an operating set.

Unitune Model BD. This consists oftwo condensers and two specially woundcoils designed for use only in the B -Dcircuit.

GREEKS SET WAVE LIMITWASHINGTON.

The Greek Government has prohibitedthe operation of all private wireless re-ceivers having a wavelength of over 2,000meters, according to a report to the De-partment of Commerce. Owners of in-stallations having a receiving capacity ofa wavelength higher than 2,000 metershave been required to bring their appar-atus to the electric plant for adjustment.

WORLD'S FINESTLOUD- 'AC'

SPEAKERA three-foot none speak-er ---unit developed by theinventor of the Tropodyne.Easily assembled, saving80% of the cost. Com-plete Kit with blue printssold on rigid money -backguarantee - shipped Pro -paid or C.O.D. 810.

Engineers'

W. Service Co.ZS Church Street New York

2sEE that rubber jacket about to descendon the "howler"? Once this "howl

absorber" slips over a tube the howl stopsfor once and all!

No more ruined reception. The thickshield of live rubber effectually soaks up the trouble -making vibration.

You can get it for every size tube !Just ask your dealer, or write.

National 'Distributors. for the U. S. A.SPARTAN ELECTRIC CORPORATION

350 West 34th Street, New York City.-2Planufactured in the U. S. A. by

SCIENTIFIC PRODUCTS CANADA, LTD.

PRICE75 CENTS

EACH

Battery CompanyPromotes Officials

A. L. Humphrey, chairman of theboard, Westinghouse Union BatteryCo., announced changes in the sales, en-gineering and executive organization. C.H. Smith, vice president and general man-ager, has been made president and gen-eral manager. D. W. Souser has beenappointed assistant to the president. J.K. Ross Duggan, manager of export,has been promoted to vice president ofsales. J. L. Rupp, sales manager has beenpromoted to vice president of engineer-ing. G. B. Cushing, assistant sales man-ager, has become sales manager.

STARK JOINS FRESHMANKimball Houton Stark, welt known in

radio circles, has joined the FreshmanCompany as purchases, materials andproduction control executive.

Greater DistanceFiner Selectivity

Greater Powerwith

API°@- SUPER -SENSITIVE

INDUCTANCE UNITS

Tuned Radio Frequency Kit

$12.00Replace your present inductances

with this Aero Coil Tuned RadioFrequency Kit. It will positivelyimprove the performance of yourreceiver. Special patented AeroCoil construction eliminates radiofrequency losses. You will noticeinstantly, a tremendous improve-ment in volume, tone and selectivity.

This kit consists of three matchedunits. The antenna coupler has avariable primary. Uses .00035 con-denser. Coils are uniformly airspaced. No dope is used. Conse-quently they tune into resonance ona "knife's edge."

FREE with Each KitEight -page color circuit, lay-out and instruction sheet forbuilding the super -sensitive 5 -tube A er odyne Receiver,packed with each kit. Getyours TODAY from yournearest dealer.

AERO PRODUCTS, INC.Dept. 108 1772 Wilson Ave.

CHICAGO, ILLINOIS

A

26 RADIO WORLD September 11, 1926

Improved Diamond is Herer1

-NHL Diamond of the Air, designed byBerman Bernard and popularized by

RADIO WORLD, appears in an improvedform this season, the kit being availablefor home constructors with such advancesin efficiency as the inclusion of the newBruno straight line frequency condensers,the Bruno encased moulded Bakelite dials,the Bruno ruby light switch, Pacent Xsockets and panel handsomely decorated.The panel view is shown on page 27, thename -piece, Diamond of the Air havingas a background a coruscating diamonddesign very exquisitely contrived.

The kit is licensed under the Armstrongregenerative patent, No. 1,113,149, undera contract with the Clapp -Eastman Co.,with the approval of the WestinghouseElectric & Manufacturing Co. The com-plete kit is being marketed by the B. C. L.Radio Service Corporation, while the basickit, consisting of coils, condensers, dialsand light switch, etc., is manufactured bythe Bruno Radio Corporation. The com-plete kit, of course, consists of the basic

EROVOX"Built Better"

Fixed Condensers and ResistorsSpecified by Herman Bernard in the

NEW, IMPROVED"DIAMOND OF THE AIR"

Aerovox Wireless Corp.489-491-493 Broome St., New York City

kit and the rest of the parts, such as fixedcondensers, leaks, mountings, runo trans-former, type D; Amperites, drilled andengraved panel, Bretwood variable gridleak, Bruno brackets, etc.,. necessary toconstruct the entire set.

A glance at the panel view shows thatthere are three jacks one at left, for loop,in the event it is necessary to resort toloop operation, next the detector outputjack; then, at right the final audio out-put jack. In lower center is the Bret -wood Variable Grid Leak.

The circuit diagram is just the samenow as it was last season, consisting of astage of tuned radio frequency amplifica-tion and a regenerative detector followedby a first stage of transformer coupledaudio and two stages of resistancecoupled audio. The General ResistanceCo. resistors are furnished with the com-plete kit, also the panel as prepared bythe Century Panel Company. The fixedcondensers are manufactured by Aero-vox.

Readers of RADIO WORLD will rememberthat the Diamond of the Air gained greatpopularity list season, and that this con-tinued even through the Summer months.Experiments conducted during that periodshowed that the circuit, as originally de-signed excellently met the needs of theincoming season, and that there was nonecessity for any change. The wholestory of how to build the receiver is des-cribed in Mr. Bernard's illustrated bookletpublished by RADIO WORLD, and with whicha blueprint is supplied. For those whoare using panels of their own a namepiecewill be furnished free on application toNamepiece Editor, RADIO WORLD, 145 WestForty-fifth Street, New York City.

The circuit is adaptable for use in con-junction with B eliminators and also for

THE DIAMONDA BADGE OF MERIT

Join the Happy Thousands WhoTriumphantly Built This 5 -Tube Set!

RealKnow

Quality!

A Great SummerReceiver

Easy toTune, Easyto Build!

Herman Bernard, designer or this wonder circuit, has written an illustratedbooklet on "How to Build RADIO WORLD'S Improved Diamond of the Air. -Send 50c and get this booklet, including a full-sized wiring blueprint and freenameplate.Outstanding Features of Set: (1) Fans, charmed by tone quality, sensitivityand selectivity, report speaker reception of far -distant stations with greatvolume. (2) A 2 -tube earphone set, a 5 -tube speaker set, and a separate 3 -stageaudio -amplifier for immediate use with any tuner, are combined in one.(3) No rheostats are used. (4) The set is inexpensive to construct andmaintain. (5) The set works from outdoor aerial or loop, hence no aerialproblems present themselves, in city or country.Send $6 for year's subscription and get booklet, blueprint and nameplateFREE.

[Newsdealers or radio dealers, order the booklets with blueprints in-cluded, in quantity, direct from American News Co. or Branches.]

Radio World, 145 West 45th St., New York CityNamepieces Free to All

inclusion of a special detector tube, suchas the Ce-co Type H, or the CX300A orUV -200A. It will require no change ofpart. If a throbbing effect develops whena B eliminator is used, known as the"steamboat" or "motor -boating" effect,then it will be advisable to connect a highresistance, about 5 megohms, from thegrid of the first audio to the plate of thesecond audio tube, leaving the other partsjust as diagrammed in the blueprint. Avariable high resistance affords greaterflexibility for this purpose;ethe setting be-ing changed until that point is reachedwhen the motor -boating completely dis-appears. Unless a variable leak is em-ployed in this connection it may be nec-essary to experiment with different valuesof fixed resistances until the correct oneis discovered.

Another point worth considering is thatsometimes in audio amplifiers using re-sistance couplffig one will find it desirableto employ a choke coil instead of a leakin the grid circuit of the final audio tube,and this suggestion is passed on to allDiamond fans in the event they may de-sire to try it, although it is seldom neces-sary to resort to this, even if a B elimi-nator is used.

The circuit is one that will stand upunder comparative tests. The radio fre-quency resistance of the coils and con-densers is low, the regenerative effect andcontrol are smooth, and the amplificationat radio frequencies is exceedingly high.The set is selective and fans who havetried it out over long periods in placeswhere selectivity is absolutely necessaryreport complete satisfaction.

If volume is lacking it is usually due toincorrect connection of the audio trans-former, the secondary being mistakenlyplaced in the plate circuit of the detec-tor tube and the primary in the grid cir-cuit of the second audio tube. When thetransfer of primary to plate circuit andsecondary to grid circuit is made the fanswho have volume trouble write in to tellabout the great pep that the set has.

Manufacturers have become enthusias-tic over the circuit, too, and are layingcomparative plans to give it the supportthat it deserves.

Sets will be on exhibition at the Brunobooth at the Radio World Fair, NewMadison Square Garden, New York.

Fool ProofAMPERITE- the perfect filament control.Takes the guess out of tube control. Noknobs to turn. Makes tubes last longer.Makes any novice a master operator. Speci-fied in all popular construction sets. $1.10.

Three No. 1A Amperites andOne No. 112 Amperites

Used in the new and improvedDiamond of the Air Kit

adiall arnparty-Dept. R. W--11- 50 Franklin Street, New York CityAerw

Ati US% Write forFREEt

Hook-ups

TEC3,1-

ahe"SELF-ADJUSTING"Rheosta

September 11, 1926 RADIO WORLD 27

THE NEW AND IMPROVED

DIAMOND OF THE AIRManufactured by the Clapp-Eastharn Co. Licensed under Armstrong Patent No. 1,113,149, exclusively for the Bruno Radio Corp.

HERMAN BERNARD'S GREAT CIRCUITGuaranteed by us and by the Manufacturers of the parts used therein

WhatVolume!

1 Bruno No. 99 B.F. Coll1 Bruno No. 99 Tuning Coll

2 No. 101 .0005 S. F.Bruno Condensers

1 Bruno Pilot light Switch3 Bruno Bakelite Vender

Dials3 4/(, Amp. Amperites (mount-

ed)

Panel View of the Improved Diamond of the Air

PARTS FOR THE NEW AND IMPROVED DIAMONDI 45 Amp. Amperite (mount-

ed)1 33.-1 Bruno Trutono Model

D Transformer -2 .1 megohm resistors1 1 megohm leak1 .5 megohm leak1 Bretwood Variable Grid

Leak

2 Double Circuit Jacks1 Single Circuit Jack

1 Century 7224 drilled andengraved Panel

5 Parent U.X. Spring Sock-ets

1 Century Drilled SocketStrip

OF THE AIR KITPr. Bruno Brackets.25 mad. demos By -PassCondensers5 strand Do Luse multi-colored battery cablePush Pull Battery Switch.00025 raid. Aeroves fixedcondensers

Sold on a money -back Guarantee-Approved by Herman BernardOUR PRICE TO RADIO WORLD READERS

Send for Bulletin 702

B. C. L. RADIO SERVICE CO., INC.

WhatQuality!

I Bruno Dimling Posts5 Battery Coble Markers2 Floxiblo loads for C bat-

tery.1 Mounts

Bus Bar Screws, Spaghetti,etc.

$37.50222 Fulton St., New York City

THE BRETWOOD -_PVariable Grid Leak

Certified forThe Diamond

The Diamond of the Air Owes Some of Its Efficiency to This Leak

THE BRETWOODImproves Any Set!

Price, $1.50

NORTH AMERICAN BRETWOOD CO., 145 West 45th Street, New York City

Century Radio Panels are pre-cision made, clean cut and abso-lutely true. Only the best materialsand the highest class workmanshipgo to make Century Radio Panels.

"Diamond of the Air Receivers"are all CENTURY Panelled

AmateursWe have a special order de-partment to make up panels topersonal specifications. Sendus details for full particulars.

CENTURYRADIO PANEL CO., Inc.

26-28W Barclay Street, New York, N. Y.

DE LUXE BATTERY CABLEThe Finishing Touch to the New and

Improved Diamond of the Air

Facilitates the connection of set to bat-teries. About six feet long with large lugspermitting easy attachments.

MULTI -COLORED BATTERY CABLEGuaranteed by

DE LUXE SALES & MFG. CO.163 Greene Street New York

GENERAL RESISTORPRODUCTS

Selected and Certified for theNEW AND IMPROVED

DIAMOND OF THE AIRBy Herman Bernard

General Resistor Co., Inc.190 Emmett St. Newark, N. J.

28 RADIO WORLD September 11, 1926

_I HARD RUBBER k-SHEET-ROD-TUBING

Special Hard Rubber Parts Made to OrderRADION HARD RUBBERPANELS ANY SIZE

Send for Prioe ListWHOLESALE RETAILNEW YORK HARD RUBBER TURNING CO.212 Centre Street New York

Lou up DOWNRADIO SERVICE

Fad iota Slaw. Heterodyne spec la listDesigning - Building Wiring - Repairs

FENWAY PARTSFREE Handsome Leatherette Log and V a Book.ndTet,c.s.r;

Mailing

CHAS. W. DOWN, M. E.2059 Broadway New York City

PHONE: TRAFALGAR 5979

0;;1*METALLIZED 1TVa 7/'"A

1 1FIXED RESISTORS

PANELSFor the Improved

Browning -DrakeVICTOREEN

FENWAYand other star circuits seen in all their

shining beauty and efficiencyAT THE RADIO SHOW

Cut, Drilled and Engraved byCortlandt Panel Engraving Co.79 Cortlandt Street New York City

LYNCH POWER

UNIT USEFUL

IN ALL SETS

One of the Big ProblemsSolved by the NotedAuthor Is an A Elimin-ator That Does the Trick

(Concluded from page S)be completely described in the secondconstructional article of the 1927 Vic-toreen series and will appear in full bloomin the September 25 issue.

By the way-each one of these articleswill be complete in itself and in the de-scription of his amplifier Mr. Lynch willnot only give complete instructions forusing it with his Super -Heterodyne butalso will tell how it may be used to ad-vantage with any other form of receiver.

There is no doubt about the growingtendency among many toward operatingradio receivers directly from the lightsocket and the third article in the RADIOWon series will cover this subject verycompletely. It will have as its first ob-

Mailing ListsWill help you increase sales&end for Flt.LE catalog Oskarcountaandyricesoa cluasiEed names

"thrtit&,..pil=1,rti rein=Prot= nu, noildness Firms.

99%4=71 5 each

CLOSEUP of the National velvetvernier, variable ratio illuminateddial. Two of this type are used inthe 1927 Victoreen. A switch at low-er left turns on or off the smallbulb used for illuminating the scale.

jective the operation of the 1927 Super -Heterodyne and the Lynch Power Am-plifier with the necessary accessories usedin this fashion and will be a logical follow-up of the first two articles, but it will il-lustrate in graphic fashion how the samemethods may be employed in connectionwith other forms of receivers and amplify-ing equipment.

New devices, such as trickle chargers,automatic change -over switches andvarious type of B supplies, are rapidly ap-pearing on the market and it is Mr,Lynch's purpose to show some of theiruses, first in connection with his own de-signs and then with other receivers, par-ticularly the new designs being broughton the market this fall.

The final article in this important serieswill describe the building, installing andoperating of a filament lighting supplyfrom 60 cycle alternating current lines,capable of operating the entire receiverwhen used with the Lynch Power Am-plifier and B Supply.

RADIO WORLD'S QUICK -ACTION CLASSIFIED ADS.10 CENTS A WORD. 10 WORDS MINIMUM. CASH WITH ORDER

AT LAST - HOFF'S RADIO TROUBLEFINDER solves your difficulties, makes "tuningin" a pleasure. Investigate! John Englund,Box 267, Ontonagon, Mich.

RADIO BLUEPRINT AND INSTRUCTIONDETAILS, 5 -tube neutrodYtte and 3 -tube regen-erative low -loss sets, 25c each. M. Solberg, Box316, Yankton, S. D.

1926 DIAMOND OF THE AIR BOOKLET,containing complete constructional data and dia-grams, with blue print, 50c. Guaranty RadioGoods Co., 145 West 45th Street, New York City.

HOW TO USE AERIALS IN GROUND ANDWATER, by Lewis Winner, appeared in RADIOWORLD, dated May 29. Sent on receipt of 15c.or start subscription with that number. RADIOWORLD, 145 W. 45th St., N. Y. C.

THE BROWNING -DRAKE CIRCUIT-Text andillustrations covering this famous circuit startingwith our issue of Aug. 14. The 3 numbers senton receipt of 45c. RADIO WORLD, 145 W. 45thSt., N. Y. C.

"LIBERTY AFLAME" and other verses, byRoland Burke Hennessy. Handsomely bound incloth; sent postpaid for 51.00. Columbia Print,145 West 45th Street, New York City.

BLUE PRINT FOR 1926 DIAMOND OF THEAIR sent on receipt of 50c. Guaranty Radio GoodsCo., 145 West 45th Street, New York City.

A BUILT-IN SPEAKER SET, by Herbert EHayden, POWERTONE IN OPERATION, byCapt. P. V. O'Rourke, THE NOVICE'S NOOKbyJames B. Scully, appeared in RADIO WORLDdated May 22. Sent on recipt of 15c, or startsub. with that number. RADIO WORLD. 14$W. 45th St., N. Y. C.

THE BRETWOOD GRID LEAK will aid youto get DX even in the summer. Sent on receiptof $1.50. North American Bretwood Co., 145 W.45th St., N. Y. C.

A DISCUSSION ON SELECTIVITY, by J. E.Anderson, appeared in RADIO WORLD. datedJune t9. Sent on receipt of 15c, or start sub-scription with that number. RADIO WORLD.145 W. 45th St., N Y. C.

SELL AND INSTALL RADIO SETS. With$25 capital -we can put you in the radio businessand show you how to earn a hundred or twoa week. For full details write Guaranty RadioGoods Co., 145 West 45th Street, New York City.

HERMAN BERNARD. managing editor ofRADIO WORLD, broadcasts every Friday at 7p. m., from WGRS. Gimbel Bros., N. Y. City -315.6 meters. He discusses "What's Your Radio'eohlem1" Listen in I

GETTING MAXIMUM RESULTS with Super -Heterodynes by Herman Bernard appeared inRADIO WORLD dated May 15th. 15c per cORYor start your subscription with that issue. RADIOWORLD, 145 West 45th St. N. Y. City.

DESIGN DATA FOR RADIO TRANSMIT-TERS AND RECEIVERS, by M. B. Sleeper, sent0I1 receipt of 75c. Guaranty Radio Goods Co., 145West 45:1, Street, New York City.

INSTALL THE BRETWOOD GRID LEAK andthus avoid scratchy signals. Send $1.50 for thisfamous grid leak. North American 13ctstood Co,145 W. 45th St., N. Y. C.

TEAR OFF AND MAIL TODAY

8 Week's Trial Subscription, $1.00KEEP ABREAST OF THE LATEST

RADIO DEVELOPMENTSRADIO WORLD

155 WEST 45th ST. NEW YORK MT

Attention, Radio World Subscribers!Subscribers will note that the end of their subscriptions is indicated on the labelson wrappers. If your wrapper shows a date earlier than the current issue, please

send payment for renewal. Changes in expiration dates on wrappers appear two weeksafter receipt of renewal.RADIO WORLD, 145 West 45th St., New York City. (Phones: Bryant 055R-0599

THE BRETWOOD GRID LEAK will aid youto get DX even in the summer. Sent on receiptof $1.50. North American Bretwood Co.. 145 W.45th St.. N. Y. C.

DETAILS OF WIRING THE DC B ELIMIN-ATOR Part II by Lewis Winner, appeared isRADIO WORLD dated April 24. Seat pm re -

not, 15e, or start sob. with that issue. RADIO%uri trt

September 11, 1926 RADIO WORLD 29

TUNING PUTS

CONDENSER IN

AIDING PHASE(Concluded frosts pdge 10)

the dotted line, Fig. 4, a current will flowout of the condenser through the wire.

This action can be tried by taking alarge by-pass condenser, say of 1.0 rnfd.or more and placing the B battery term-inals across it. A very slight spark ornone at all will be noticed both on con-tact and when the connection is broken.

However, when a short-circuiting wireis placed across the terminals a heavyspark will be emitted. The voltages pro-duced in the condenser then help the in-

coming voltage instead of lagging behind,as in the case of the inductance.

While there can be no flow of currentin the sense of a steady current, if alter-nating current is applied to the plates,it may be seen that there will be a flowas the condenser empties and fills peri-odically with the pulsations of the cur-rent. Taking as an anology a pipe con-nected to a reservoir, as shown in Fig. 5,-the water would flow into the tank andthen out again as the pressure wasvaried.

In direct current the pressure remainsthe same and the tank fills up to a certainlevel and stays there, while in the caseof an alternating current the pressurewould be alternately maximum positive,zero, and maximum negative, and thetank would alternately fill and empty andthere would be a flow of current first inone direction and then in the other.

As said before, the lines of magneticforce formed around a wire will producea current in another wire when the linescut through. Heretofore we consideredonly the cutting of the lines in the onecoil.

If there is another coil forming a cir-cuit placed near a coil in which alternat-ing current is flowing, as shown in Fig. 6,a current of electricity will flow in thecoil B of the same frequency as in thatof A. We may get an electrical alter-nating current into a circuit withoutactually employing a generator directlyin the circuit. Suppose now we place acondenser in series with the coil as shownin Fig. 7. How will such a circuit act?We are very much interested in this com-

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bination, as it is used as the basic prin-ciple in almost all tuning operations inthe electric receiver.

Low ResistanceWith a given frequency induced in the

coil having a certain inductance there isa certain amount of resistance to the cur-rent flow due to the inherent resistanceof the wire and also to the fact that thereis an opposing electromotive force. Forthe time being let us forget the resistancedue to the material and size of wire andconsider only the opposing voltages orresistance.

Now also let us remember that with agiven frequency a condenser has a volt-age which is in phase or helping thesource. If the capacity and inductanceare brought to the proper value then, thetwo voltages formed respectively in theinductance and capacity will be in op-posite directions and will cancel eachother out. Then there will be virtually noresistance at all to the incoming voltageexcept that of the wire itself. This isthe condition which is found in radiocircuits when the circuit is in tune orresonance.

With any given frequency there will bea certain value of inductance and capac-ity in which the resistance is at a mini-mum. According to Ohm's law, I (cur-rent) equals E (voltage) divided by R(resistance) and, as may be seen, thelower the resistance the greater the cur-rent and the more power in the circuit.The condenser in the radio receiver isordinarily made variable and adjusted toa desired frequency.

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A combination alkaline element battery andtrickle charger all in one. Can be chargedwhile set is operating. Price complete shippeddry with solution, $16.00. 100 -volt with Chem-ical Charger, $12.00. 140 -volt, $17.00.Write for our illustrated 24 -page booklet and

Send No Money Pay Expressman.SEE JAY BATTERY COMPANY913 Brook Avenue New York City

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RADIO WORLD 'September 11, 1920

Good Back Numbers of

RADIO WORLDThe following Mustrated articles have ap-peared in recent issues of RADIO WORLDI

t 926Jam 2-The 2-C Sat for Simplicity, by Copt.

P. V. O'Rourke.

Jan. 9-The 4 -Tube DX Symphony Sec. by AIrving MU. A Skillfully Made I -Dial Set,by Herman Bernard.

Jan. I6-Anderson's 5 -Tube Quality Smelter.The Raytheon B blimlnator by Lewis Win -ner.

Jan, 30-An Individual AP Amplifier. by H. E.Hayden. Trapping Out Super -Power in NewJersey, by tart. P. V. O'Rourke.

Feb. 27-The 4 -Tube DX Dandy, by Herbert E.Hayden Umbrella Aerial for DX, by HugoGerusback.

Mar. 6-The I -Tube Set, by Capt. O'Rourke.The Chemistry of Batteries, by A. R. Reid.

Mar. I3-The Non -Regenerative Browning -DrakeSt (Port 1). by 1SL B. Sleeper. The Ter -iron Eliminator, by Lewis Winner.

Mar. 20-The Super -Heterodyne, by J. E. Ander-son- A 2 -Tube Speaker Set, by Peter War -M.The Browning -Drake Bet (Part 2), by

. B. Sleeper.Mar. 27-An Economical 4 -Tube Set, by Mdgar

T. Collins. A Practical B Buttery, by Cunt.P. V. O'Rourke. Tectron Trouble Shooting.by Lewis Winner.

April 3-How to 'Get DX, by Capt. P. V. O'Rourke,A Compact B OupPly, by Levels Winner.

April 17-The New 1-D lel Powertone, by CantP. V. 0"Itourke. The Action of Transform -ers, by Lewis Winner.

May I-New Multiple Tube, by Herman Ber-nard. The Aero All -Wave Set, by Cale.O'Rourke. Kilocycle -Meter Chart. AnAnalysis of Detection, by J. E. Anderson(Part 1).May 8-A Study of Detection, by J. B. Ander-son (Part 25. To Wind a Loop on a Card-

board Prance. How to Refire Resistance Ale.by Theo. Kerr.

May IS Super-HeterodyneResults Brought Upto Maximum, by Herman Bernard. The TruthAbout Coil Fields, by J. E. Anderson.

May 22-A Built-in Speaker Set, by HerbertB. Hayden_ T110 Powertone fn Operation, b/'Capt. P. V. O'Rourke.

May 29-Aerials in Ground and Water, by LewisWinner. Economismi 'Pilaments, by J. E.Anderson How to Get DX, by John F.Hider.

June 5-Floe-Tube Compact Receiver, by J. B.Anderson. A Tester for Tube Circuits, bySpenmr Hood. Problems of Portables, byHugo Gernsback.

June I2-The Light 5 -Tube Portable, by Her-man Bernard (Part 1). The Rogers-SchudtReceiver. by Wm. A. Schudt, Jr. (Part 1 I.Tile Freshman Masterpiece, by A. W.Franklin.

June 19 -Selectivity's Amusing Toll, by J. R.Anderson. The Light 6 -Tube Portable Set.by 'lemma Bernard (Part 2). The 9 -TubeRogers-Schudt, in Wm. A. Schudt, Jr.(Part ID.

June 26-The Viotoreen Portable, by HermanBernard (Part 1). The Manufacture ofTube, by P. C. Kelley. The Light 6 -TubePortable. by Herman Bernard (Part 3). TheIngers-Schudt Circuit (Part 3 concluded), InWei A. SchudL

July 3-Set with a I -Tura Primary, by HermanBernard. Part 2 of the Victoreen Portable, toH. Bernard. Trouble Shooting Article fee TheLight 5 -Tube Portable.

.1111Y 10-A hub In Single Control, by HermanBernard. A DX Double Regenerator, byCapt. P. V. O'Rourke. A 2 -Tube Dry CellReceiver, by Samuel Schotale.

July I7-A Double Duty Loon Aerial, by Y. le_Anderson. How to Measure Coupling, brJohn Rider. A 1 -Control Crystal Set, bySmedly Lyons.

I sly 24-Why the Super -Heterodyne Is the ButSet, by Herman Bernard. A 1 -Tube Red.Receiver, by H. A. Reed -

July 31-WIlet's Heat in an AP Amplifier. beHerman Bernard. A 6 -Tube Reverted Feed-back Set, by K. H. Humphrey.

Aug. 7-The 5 -Tube Tabloid, by A. Irving Witt_The Wiring of Double Jack. by Samuel Lager.

Aug. 14-The Improved Browning -Drake, by Her-man Bernard (Part 1). Storage Batteriesby Jobb A. White.

Aug. 2I -A New Stabilised Circuit, by E.H.Loftin and S 1 White (Part 1). The Brasing -Drake, by Herman Bernard (Part 2).

Aug. 28 -The Constant Coupling, by E. H. Loftinand S. Y. White (Part 2). Tbe BrowningDrake, by Merman Bernard (Pert 3).

Any espy, 15e. Any 7 copies, $1.00. All these29 males for 54.09, or start subscription with anyler., RADIO WORLD, 145 West 45th Street.Nur York City.

Lewis-WerrenrathSongs for Banquet

The largest audience that has yetlistened to any singer is expected to hearMary Lewis, famous soprano of theMetropolitan Opera, when site broadcastssimultaneously from 33 stations through-out the country, on the night of Sep-tember 15.

The occasion is the annual Radio In-dustries Banquet at the Hotel Astor, heldin connection with the Radio World'sFair, New Madison Square Garden. MissLewis will be the headliner, singingthrough the courtesy of A. Atwater Kent,

USE HALF A MILE OFWIRE FOR AERIAL!

It affords Greater Volume, More DX andRicher Tone, without Reducing Selectivity!The Raw Braided Copper Radio Antennaconsists of a 100 -foot length of No. ZS enam-eled copper ribbon. If the single strands wereplaced end on end they would reach half amile. The enamel protects the surfaceagainst losses due to moisture, dust and lint.Corrosion and scaling absolutely prevented.

Indorsed by HERMAN BERNARD

No. 25 RACO ANTENNA.Shipped you direct from fac-tory same day on receipt of(if your nearest dealer cannotsuPPlY yen)

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59 BATH ST. PROVIDENCE, R. I.DEALERS! WRITE US!

TO KEEP YOUR FILES COMPLETE, you atorder your newsdealer to put a copy aside foryou each week while on your vacation. Or, send$1.00 for RADIO WORLD from now until theend of August, and in this way you will notmiss any copies. SUBSCRIPTION DEPT.,RADIO WORLD. 145 W. 45th St., N. Y. C.

$1.50

whose series of minter concerts will beattounced soon.Miss Lewis and IZeinald Werreffrath,

both Victor artists, will sing together the-Barcarolle" from "Tales of Hoffman:.Miss Lewis will then snag the aria from."Louise," following with a group of threeshort songs, "The Land of the Sky BlueWater," by Charles Wakefield Cadman:

Ay, Ay," the now famous Spanishsong, by Osman Terez Sreire, and "TheAnswer," by J. Huntington Terry.

It Was in "Tales of Hoffman" that MissLewis made her operatic debut in Londonat the close of which it became necessaryto turn out the lights to stop the applausand send the audience home. This followedher now internationally known successfulsinging of "Marguerite" in "Faust" be-fore the brilliant audience in Vienna,where she was hailed as "greater thanJeritza," the great Austrian prima donna.

Miss Lewis left Europe earlier than sheintended in order to he here for the Liveradio event.

Schedule of MeetingsAs Adjuncts of ShowThe trade and station meetings at

Hotel Astor, in conjunction with the sd,and the banquet, are scheduled as fol-lows:

Monday, September 13th at 2 P. M.,open meeting for all broadcasters,

Tuesday, September 14th at 10:30 A.M., annual meeting of National Associa-tion of Broadcasters. Members only,

Wednesday, September 15, general con-ference of entire radio industry.

NEW CORPORATIONSModel Rudio Shop, N. 17. C.. $10,000; 3. Pat,,...,

1. 1- Garbin, H. Turkel. (Attys., Schanzer &-Ostrow, 15 lark Row, N. V. C.)

D. X. Electrical Products Corp., N. Y. C..radio manufacturing, 100 conunon, no par; A. 3

Gross, B. S. KrotkotT. B. Rosenfield. (Atty., L.Biumberg35 Y. C.,

RADIOPRODUCTS

A new Welty unit. Two step tuned R. F., all wiredand ready to install in any set. The condenser ofNaAld made with localized tuning dials extendingthrough the panel. AD condensers may be operatedsimultaneously or separately. Equipped with eithercopper, shielded or unshielded R. F. coils of theplug in type. Absolutely dependable. Exceptionalselectivity. Excellent tonal quality.

Price, with Shielded CoilSeparate Coils, ShieldedWith Unshielded CoilsUnshielded

$32.50$12.50$28.50

$8.50 Welty's R. F. Amplifier Unit

WELTY'S DETECTOR -AMPLIFIER UNITCan be used in any receiver, Extremely conic-.Size 4 41:9 B, All strictly high class parts. Umversal sockets. Distortionless transformers. Handies volume of any set. Only 4 connections nece,nary to hook up to any tuning apparatus. Swit.1and jack. Whenever a detector and two stagesaudio are required you can use it. Saves time 1,

building. Price for three circuit $19.5eFor five tube $22.50

; Also type B amplifier, with 3 steps combined r,sistance, impedance and transformer amplificationNone better. Price $26.5L

WELTY'S SUPER KITKit includes Antenna Coupler, Oscillator Coupler.Special Variable Condenser. Tuned Input Trans-former. 3 Matched Intermediate Transformersand hardware. Complete with booklet, diagram,.assure perfect success. Order now. At oulstore or by mall. Price 817.50c..itspietz Kit (all parts) S-3 So

111102 44PWM. WELTY & CO.,36 South State St., Chicago

September 11, 1926 RADIO WORLD 31

Tube SetSingle Dial Radio

Wonderful offer direct from the factory! The world's greatest radio.A perfect working, single dial control, 7 tube receiver. And just to prove our claims, we willship it to your home for 30 days' free trial. Test it under all conditions. Test it for distance, vol-ume and tonal quality-and if you are not convinced that it is the best single dial set you everbeard, return it to the factory. We don't want your money unless you are completely satisfied._

sumamiaminiimaiiinumaiimmassimanniumnssiBIG PROFITS m

TO AGENTS AND DEALERSOur Agents and Dealers make big money

_4 selling Metrodyne Sets. You can work alla or part time. Demonstrate the superiority

of Metrodynes right in your home. Metro- dyne Radios have no competition. Lowest

wholesale prices. Demonstrating set on 30days' free trial. Greatest money -making

opportunity. Send coupon below-or a let-a ter-for our agent's proposition.inEMINEIII111111111111INIMINI11111111111111111111MMI111.11111111Mi

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30Bays' FREE Trial

Retail Price

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Big Discountsto Agents and Dealers

Metrodyne Super- Seven RadioA single dial control, 7 tube, tunedradio frequency set. Approved byAmerica's leading radio engineers. Designedand built by radio experts. Only the highestquality low loss parts are used. Magnificent,two-tone walnut cabinet. Artistically gildedgenuine Bakelite panel, nickeled pianohinge and cover support. All exposed metalparts are beautifully finished in 24-k gold.

Metrodyne Super -SixAnother triumph in radio. Here's the new 1927 model Metro-dyne 6 tube long distance tuned radio frequency receiving set. Ap-proved by leading radio engineers of America. Highest grade lowloss parts, completely assembled in a beautiful walnut cabinet.Easy to operate. Dials easily logged. Tune in your favorite stationinstantly on same dial readings every time. No guessing.

Mr. Howard, of Chicago, said: "While five Chicago broadcasting stationswere on the air I tuned in seventeen out-of-town stations, including NewYork and San Francisco. on my loud speaker horn, very loud and clear, asthough they were all in Chicago."

We are one of the pioneers of radio. The success of Metro -dyne sets is due to our liberal 30 days, free trial offer,which gives you the opportunity of trying before buying.

MAIL THISCOUPON Mror send a postal or letter.Get ourproposition before buying a radio.Deal direct with manufacturer-

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METRO. ELECTRIC COMPANY

Easiest set to operate. Only one smallknob tunes in all stations. The dial is electric-ally lighted so that you can log stations in thedark. The volume control regulates the recep-tion from a faint whisper to thunderous volume,1,000 to 3,000 miles on loud speaker! The Met-rodyne Super -Seven is a beautiful and efficientreceiver, and we are so sure that you will bedelighted with it, that we make this liberal30 days' free trial offer. You to be the judge.

Mail COUPON Below!Let us send you proof of

Metrodyne qualityF. L. Warnock, Greentown, Ind., writes: "I received the Met,rodyne in good shnpe and am more than pleased with it. Gotstations 2,000 miles away."C. J. Walker, Mariposa, Calif., writes: "Received my Metro -dyne Single Dial set 0. R. I believe that these one -dial setaare going to be excellent sellers. I had no trouble in toningin stations enough to satisfy anyone, so you will please Sellame another set."Roy Bloch, San Francisco, Calif., writes: "Very often wetravel from New York to the Hawaiian Islands quicklyfrom station to station-by means of the little tuning-lmobwhich operates the electrically -lighted dial. The MetrodyneSingle Dial Set is much essietto operate than any radio setI've ever seen."We will send you hundreds of similar letters from own-ers who acclaim the Metrodyne as the greatest radioset in the world. A postal, letter or the coupon bringscomplete information, testimonials, wholesale prices,and our liberal 30 days' free trial Offer.

METRO ELECTRIC COMPANY2161-71 N. California Ave., Dept. onChicago, IllinoisGentlemen:

Send me full particulars about Metrodyne 6 tubeand 7 tube sets and your 30 days' free trial offer

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If you are interested in AGENT'S prop-osition, place an "X" in the square Lj2141.71 N. California Ave: Dept. 607 Chicago, llinois

32 RADIO W OHL D September 11, 1926

New BST5 Shielded-Model ReceiverA $75 Set Sold Direct From Factory at $40

SatisfactionGuaranteed

or Money B ck

New model cabinet base 21" long by 8" wide, height 9%", top 21" by 6".

B beautyS selectivityT tone

TE-IIS highly sensitive, powerful and sele ctive BST -5 radio receiver has all up-to-the-minute improvements. Heavy aluminum automobile type chassis, shielded against

stray currents and distortion. Flexible grip, Universal type sockets, eliminating micro -phonic noises. Has provision for battery eliminator and any power tube. Fahnestockclips on sub -panel for adjusting C battery, has voltages for power tube. Efficient on eitherlong or short aerial, including indoor aerial. This BST -5 sets a new standard for true tonevalues and selectivity. This BST -5 gives greater volume than many six -tube sets andconsumes less current.

28 Stations in 31/2 HoursMr. E. H. Thiery, Tax Collector, New Hartford, Conn., wr ites : "I am well pleased with my BST. In three hours anda half last night I got the following stations: WTIC, WJZ, WGY, WBZ, WPG, WNAC, WMSG, WEEI,KDKA, WAAM, WEAN, WSAR, WJBI, WMAC, WLWL, WJAR, WAHG, WBNY, WEAF, WNJ, WCSH, WSAN,

WHK, WMCA, WRVA, WHN, WHAR, WWJ.

Top inside view showing compact aluminum shieldedindestructible chassis.

Bottom inside view showing improved foolproof curkoidcoils and rigid construction, with complete harness for

simple installation.

Direct from fact ry to youImmediate Delivery Send Check or P. 0. Money Order

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RADIO WORLD Guarantees the Respo risibility of This Advertiser

September 11, 1926

HAMS' AMITY

BUILDS UP AS

NATIONS SNAP

Political Differences Be-tween Countries, EvenWhen at White Heat, DoNot Deter Amateurs'Friendship Clasp Overthe Seven Seas.

In these days when many nations areembroiled in domestic and foreign diffi-culties and when war seems just aroundthe corner for some of them, a reassur-ing and peaceful note is struck by theradio hams, as the amateurs are called-those thousands of young men and boysof every nationality who are nightly con-versing on the air and establishing friend-ships far and wide.

A few months ago these young men,working in code, were blamed for most ofthe interference that hampered broadcastprograms. They kept pegging away, how-ever, improving their transmitters, andtoday if you go down low enough_ on thewave scale you will find them reachingout, almost completely, round the world,to extend the hand of fellowship.

Cover Great DistancesEveryone knows that these experi-

menters in code transmission exist, butmost folks think that the conversationrange is only a few miles. Very fewknow the romance and the thrill there isin the nightly air journeys of these boys,for most of them are just boys.

William E. Jackson, of Schenectady, isa graduate of Brown University and isnow employed in the radio departmentof the General Electric Company. He hasbeen dabbling in radio for years and ustnow he is working a crystal controlledtransmitter, 2AHM, whose note has beenheard in the far corners of the earth. Hebeen dabbling in radio for years and justtwo-way communication with operators in42 countries and these air chats have beenfollowed by exchange of letter and card.Others have done as well or nearly aswell as Jackson and he and these othersare establishing a basis of internationalfriendship.

Got SpitzbergenJackson worked the Chantier, the base

ship of Commander Richard Byrd, whilethe boat was at Kings Bay, Spitzbergdn,and relayed many messages from cor-respondents to "The New York Times."Communication was maintained with theChantier after the ship left Spitzbergenfor England and the operator at sea re-ported 2AHM exceptionally clear- and, be-cause of its crystal control, always re-liable.

He has exchanged letters and messageswith operators in the Philippines, NewZealand, Australia, South Africa, Green-land, Tasmania, Hawaii, India and prac-tically all the countries of Europe andSouth America. He has a treasuredlibrary of cards from friends of the airand to those unfamiliar with the frater-nity of hams, these are just a jumble ofletters and code.

These cards carry the call letters of thewriters.

RADIO WORLD 33

Truphonic PowerAmplification

Is No Mere Improvement, It

Now Perfects Radio ReproductionCOMPLETE ACCESSORY

Buy it as SEPARATE UNITSCATACOMB ASSEMBLY

You can now buy real amplifi-cation. The one new and out-standing radio achievement ofthe year, so far announced, isthe revolutionary method ofamplification, invented by thewell known scientist, H. P.Donle. By the use of this method it is for the first time possible topreserve the clarity of the detector tube over the full range of themusical scale and at a volume as great as that achieved by any otherform of amplification.

An Accessory for the Complete SetMusic from your radio can now surpass that from the most expensivemodern set unless Truphonic equipped. Just connect the cables of theTruphonic Power Amplifier to your batteries, shift the audio tubes fromyour set to the amplifier sockets, add one power tube, plug in the adapterat the detector tube and connect the loud speaker. You'll be amazed atthe sudden transformation.

Complete amplifier ready to attach to set. No. 304, List price $20. (Includes bat-tery leads, output unit for protection of loud speaker, with power tubes and con-necting adapter).

Individual Units for the Service ManIf you are remodeling or building a set, the individual couplers which makeup the amplifier can be purchased stage by stage. Each coupler, as well asthe output unit, is mounted in a separate iron clad case.The bracket arrangement makes it possible for each case to be mountedin any position desired. Each unit is compact, equipped with leads, andperfectly fitted for permanent installation.

Individual Truphonic Couplers No. 301, List price $5.00 per stageTruphonic Output Unit No. 300, List price $5.00

Complete Catacomb Assembly for the Set BuilderIt is especially the Truphonic Catacomb Assembly which is creatingenthusiasm among set builders. Every integral part so obviously andquickly slips into place that you have it together almost before yourealize it.There is no drilling of panel, no mounting sockets or binding posts to bother with.The Gang Socket with its unique contacts is one reason for the ease of assembly. Thismoulded socket panel covers the lacquered steel catacomb containing three Truphoniccouplers and an output unit. It has one piece of metal for all common filament contacts,and continuous metal from plate and grid terminals to connected apparatus.The whole assembly is remarkably small and compact, simplifies your construction problem,and lessens considerably the number of soldered, joints in your set.If you have never dared tackle or had the time for set building before, you can certainlydo so now with perfect assurance.

Truphonic Catacomb Assembly. (Three couplers, output unit, sockets, catacomb,battery cables).With six sockets No. 306, List price $20.With seven sockets No. 307, List price $22.

You swing from station to station,moving all condensers at once withthe fingers of one hand. Then withoutshifting the fingers, you adjust eachcondenser for maximum volume. Hereyou have all of the advantages ofsingle contact without its limitations.

No. 21 72-Double Condenser 58.00No. 2173-Triple Condenser 10.00No. 2174-Quadruple Condenser 15.00No. 2170-Double Condenser, tickler

controller 10.00

Send for Complete InformationWRITE TO DEPT. S4.

ALDEN MANUFACTURING COMPANY Springfield, NIass.

34 RADIO 'WORLD September 11, 1926

FREE!!This handsome VALET Auto -Strop RazorFREE-with every five months' subscrip-tion to "Radio News" or "Science and In-

vention" or "Amazing Stories"

In order to acquaint the readers of this magazine with these great publications,making, for a limited time, a special reduced rate and are also giving FREE one completeVALET Auto -Strop Razor outfit.

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For only $1 (Regular Newsstand price $1.25) you can obtainany one of these magazines for five months and also, oneFREE Razor-

RADIO NEWS is the largest radio magazine published. Itis the outstanding authority in the radio field, carrying morenew developments, more hook-ups and more news than anyother radio magazine.

RADIO NEWS has been radio's greatest magazine since thevery beginning of radio broadcasting.

Every day, in all corners of our busy world, Scientists are atwork on new Inventions, developing marvelous machines forthe progress of the world or compounding strange chemicalsfor many uses. All these things are shown in the novel maga-zine "SCIENCE AND INVENTION."

There is also a big Radio Section to "SCIENCE ANDINVENTION" for beginners.

Marvelous, Amazing Stories by great men such as Jules Verne,H. G. Wells, etc., appear in this new magazine AMAZINGSTORIES every issue.

Stories of flying into space at dazzling speed on a comet;Mesmerizing the dead, remarkable situations of all kinds.Tremendously interesting-yet instructive.

Keeps you in touch with the writings of the men with thegreatest imaginations in the world.

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EXPERIMENTER PUBLISHING CO., Inc.53 Park Place, New York, N. Y.

Gentlemen: Enclosed find Si for 5 Months' subscription to 0 RADIONEWS or OSCIENCE and INVENTION, 0 AMAZING STORIESand 1 Free Auto -Strop Razor advertised above.

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EXPERIMENTER PUB.LISHING CO., Inc.

53 Park Place New York, N. Y.CHECK MAGAZINE DESIRED AND MAIL COUPON TODAY.

WNW =me um, on1 am/

September 11, 1920 I) I 0 \\ R I, I)

Radii) WO/Ids C"BBACON"reCCIPCi lies LI particularlyplcasiug panel. layout. Only3 ittstrunicit is show -2MARCO illuminated con

trills. dud thefilament S tt-Ch,

air -trigger tuning responseflashes in the spotlight of beauty

MAR -CO Illuminated Controls,$3.50 each

DiAR-CO 4" vernier dials, [fitany set} nickel plated $2.50

gold plated $2.75

New MAR -co rheostat dial 75c

Two-thirdsactual size

The receiver you equip withMAR -CO controls differs fromany dial operated set.

In micrometer fineness ofcontrol-in swift certain re-sponse-in utter absence of" play -- the new MAR -Coilluminated control is ap-proached only by the celebra-ted MAR -CO dial. Perfectionof gearless "friction -drive" isyours only with MAR -COtuning.

Searching action, in keepingwith 1927 brodcast condi-tions . . . .

- flashing beauty.... in stepwith 1927 standards ofset design . .

- these advanced featuresdistinguish your MAR -COequipped set.

Any set you build, or remodel,can have MAR -CO corrtrols. Scalesread o to loo, or loo to o, asdesired. Packed with each controlis a special MAZDA bulb whichruns on your regular "A" batteryor on a separate "C" battery.The template, also included, re-duces the panel mounting to asimple io-minutes' diversion. Theinstruction booklet illustrates 15standard makes of condensers fit-ted to MAR -CO controls. Send nowfor your copy. Martin -CopelandCo., Providence, R. 1.

14tAR'COIlluminatedCONTROLS

A Val

RADIO WORLD September 11, 1926

Perhaps you, too, can cut your"B" battery costs in half. Justfollow the chart. It gives youthe secret of "B" battery economy.

No..768

Portable

No.772 No.770 or No.486

It 9 orI or °Ft 1.

^ IAt 1 more

THOUSANDS of people havemade the discovery thatEveready "B" Batteries,when used in the proper size,and on sets equipped with a"C" battery*, are a mosteconomical, reliable andsatisfactory source of radiocurrent.

Here is the secret of "B"battery economy, reliabilityand satisfaction:

On all but single tube sets-Connect a "C" bat-tery*. The length of ser-vice given below is basedon its use.On 1 to 3 tubes-UseEveready No. 772. Lis-tening in on the averageof 2 hours daily, it willlast a year or more.On 4 or more tubes-

*Nom: A "C" battery greatly increasesthe life of your "BP batteries and givesa quality of reception unobtainable with-out it. Radio sets may easily be changedby any competent radio service man topermit the use of a "C" battery.

Use the Heavy -Duty"B" Batteries, either No.770 or the even longer -

lived Eveready Layer-biltNo. 486. Used on theaverage of 2 hours daily,these will last 8 monthsor longer.These figures are based on

the average use of receivers,which a country -wide surveyhas shown to be two hoursdaily throughout the year.If you listen longer, of course,your batteries will have asomewhat shorter life, and ifyou listen less, they will lastlonger.

Evereadys give you theirremarkable service to the fullonly when they are correctlymatched in capacity to thedemands made upon them byyour receiver. It is wasteful

Radio Batteries-they last longer

. _

to buy batteries that are toosmall. Follow the chart.

In addition to the batteriesillustrated, which fit prac-tically all the receivers in use,we also make a number ofother types for special pur-poses. There is an EvereadyRadio Battery for every radiouse. ,To learn more about theentire Eveready line, writefor the booklet, "Choosingand Using the Right RadioBatteries," which we will beglad to send you on request.There is an Eveready dealernearby.

Manufactured and guaranteed by

NATIONAL CARBON CO., INC.Nev York San Francisco

Canadian National Carbon Co., LimitedToronto, Ontario

Tuesday night means Eveready Hour-8 P. M., Eastern Standard Time,

through the following stations:WEAF-NeW York wsnr-Cincinnatiwsmt-Provideere WTAXI^Cietrotaltdwear -Boston WAVJ-DetroitIvTAG-Worcester WON-Chicagown-Philegleiphia woc-Davenportwoe -BuffalowcpE-Pittsburgh

xsp-St. LouiswceoCrygri'

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