the magazine of broadcast management ......we wear these out. at the present rate of deterioration,...

A MACTIER PUBLI-CATION I NOVEMBER 1966

THE MAGAZINE OF BROADCAST MANAGEMENT ENGINEERING

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STATION PLANNING AND MODERNIZATION

Starline Satellite Line Extender Model SLE-1

Reach more subscribers withnew Starline Satellite

Jerrold's new solid-state, cable -powered Starline Satelliteline extender is the economical way to deliver qualitycolor pictures to more subscribers. It features a regulatedpower supply, plug-in amplifier module with variable tiltand gain controls plus plug-in pad facilities, external rftest points, and the Starline air -tight, radiation -proof,multi -mount housing.

The Satellite is a valuable adjunct to the total solid-statecapability of a complete Starline system. It's compatiblewith any system providing 20 to 30 volts ac via the feedercable. For complete details on the Satellite or otherStarline system equipment phone 215.925-9870, or write

JERROLD

CATV Systems DivisionJERROLD ELECTRONICS CORPORATION401 Walnut Street, Philadelphia, Pa. 19105

FIRST IN CATV The nation's largest and most experiencedmanufacturer/supplier of CATV equipment and services.

Circle 2 on Reader Service Card

"No Other System Makes Back -To -Back Cueing So Sure -Fire"

CUE-MATICRECORDERSREPRODUCERS

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)More than 1500 selectior s, commercialsetc., are at fingertips of KYA, San Fran-cisco, engineer. Rapid-fire hit program-ming (60 cues/ hour) is handled with easyfingertip filing and ready access to mats

KYA REPORTS ON CUE-MATIC* RECORDERS:

"For tight cueing, and instant rotation se-quence changes without redubbing, CUE-MATIC recorders can't be beat," says PaulM. Beck, KYA, San Francisco._ "They makeour sound the surest and cleanest on theair. All of our music, news, commercials,and ID's are individually converted tomats and filed right here-so the operatorhas the entire library at his fingertips. Be-cause the mats are tough, flexible, virtu-ally damage -proof sheets, they end mis-haps of cartridges or reels. They cue -upautomatically in the AG -100 recorder. Be-cause mats are a magnetic medium, oursound stays "first -play" fresh. They fiPeeasily in minimum space. Label easily.After two years with the CUE-MATIC re-corder system maintenance has been verylow, and we are 100% sold on it." Ask yourdistributor fat details, or mail the coupon.


To: Ampex, Redwood City, Calif. 94063SHOW ME SURE-FIRE PROGRAMMING.p Send me Mr. Beck's recent A.E.S. engineering paper about KYA's radio pro-gramming on CUE -MAT* mats.p Arrange an AG -100 CUE-MATIC Recorder demonstration.

NAME

TITLE

STATION

CITY

STATE ZIP

AMPEX.T -M. AMPEX CORP.

NOVEMBER 1966/VOLUME 2/NUMBER I I

BM/THE MAGAZINE OF

BROADCASTMANAGEMENT/ENGINEERING

Publisher:MAL PARKS, JR.

Editor:VERNE M. RAY

Corporate Editorial Director:TAMES A. LIPPKE

Art DirectorGUS SAUTER

Associate Editor:CHARLES BUFFINGTON

Production:INEZ ATHEY

Circulation Director:H. C. GAINER

Circulation Fulfillment:N. VARTABEDIAN

Advertising Services:ARLINE JACOBS

Reader Service:R. R. BELL

Promotion Manager:E. L. GRAY

Broadcasting is curently un-dergoing the familiar "grow-ing pains" of a rapidly expand-ing industry. In many cases,stations are faced with theneed for new equipment and alot more space. Often the bestsolution is a completely newbuilding, designed to suit thespecial needs of today's broad-casting business. Special con-siderations must be given tospace for studio and trans-mitter gear, such as heatingand air conditioning, acoustics.lighting, wiring, etc. Thus, inthis issue, we've concentratedon planning and modernizing,with features based on just -completed facilities. We hopethey help you with plans forupdating your plant.

6 Broadcast Industry NewsTimely reports on events, companies, and people.

13 Interpreting the FCC Rules & RegulationsComparative issues considered by the Commission whenchoosing between applicants for a broadcast allocation.

20 Planning a 100 -kw FMHere's how KOFM Oklahoma City planned its facilitiesaround combination live and automated programming.

25 Cincinnati TV's "New World of Tomorrow"WCPO-TV is just completing a new building which setsthe pace for modern television facilities.

30 Planning a New Broadcast BuildingThinking of building a new home for your radio station?Get the benefit of experience gained at WOHI.

38 Planning a New CATV SystemGuidelines for the franchise holder who plans to buildhis own

48 'Broadcast EquipmentReports on newly introduced products and components.

60 Broadcasters SpeakFeedback and chit-chat from BM/E readers.

63 Index to Advertisers

64 Literature of InterestValuable data you can obtain by using the ReaderService Cards opposite the front and back covers.

65 Classified Section

68 Engineering CasebookHow WKCT uses a standard PA amplifier with addedcircuitry to also function as an RPB amplifier.

69 Reader Service CardUse this FREE postage paid card to receive more dataon new products and literature described in this issue.

BM/E Editorial & Production Offices: 18 Frederick Rd., Thurmont,Md. 21788-phone 301 271-7151

MACTIER PUBLISHING CORP.820 Second Ave., New York, N.Y. 10017, 212 MO 1-0450

Publishers also of:EEE-the magazine of Circuit Design EngineeringELECTRONIC PROCUREMENTVOLT/AGE-the magazine of Electrical Apparatus Maintenance

BM/E, the magazine of Broadcast Management/Engineering, ispublished monthly by Mactier Publishing Corp. All notices pertain-ing to undeliverable mail or subscriptions should be addressed to820 Second Ave., New York, N.Y. 10017.

BM/E is circulated without charge to those responsible for stationoperation and for specifying and authorizing the purchase of equip-ment used in broadcast facilities. These facilities include AM, FM,and TV broadcast stations; CATV systems; ETV stations, networksand studios; audio and video recording studios; consultants, etc.Subscription prices to others are: U.S., its possessions and Canada-$5.00 one year, $9.00 two years; elsewhere $7.50 one year, $14.00two years.

Copyright 1966 by Mactier Publishing Corp., New York City.Controlled Circulation postage paid at Orange, Conn.

4 November, 1966 - BM/E

"...CBS Volumax performsflawlessly. Please do notinvent any more untilwe wear these out. At thepresent rate of deterioration,we will need to replace themby 2015 A. D."

This is what station WRNC in Raleigh, North Carolina, saidabout our equipment. They own both the Audimax AutomaticLevel Control and the Volumax Automatic Peak Controller.Station WIGS in Gouverneur, New York, wrote, "Enclosed findcheck for Volumax 400. You couldn't get it back from us fortwice the price . . ." KLIN in Lincoln, Nebraska, purchasedAudimax. They told us, "It is an engineer's dream for absolutelevel control". WAYB in Waynesboro, Virginia, tells us, "Pur-chased a Volumax and we are tickled to 99 and 44/100%modulation with it ... Congratulations on a fine product". Sta-tion KHOW in Denver, Colorado, said, "It was surprising toreceive equipment that exceeded specifications".

There isn't enough space here to include all the letterswe've received praising Audimax and Volumax. But judge foryourself. Like all CBS Laboratories equipment, they're avail-able for a 30 -day free trial. Audimax $665. Volumax $665.FM Volumax $695. Write to us, or better yet call The Pro-fessional Products Dept. directly - Collect. Telephone (203)327-2000. Maybe you'll be in our next ad.

LABORATORIESStamford, Connecticut. A Division ofColumbia Broadcasting System, Inc.


November, 1966 - BM/E 5

BROADCAST INDUSTRY

.111111EIVIVSCATV ProgramOriginationSeveral CATV systems have ini-tiated plans to originate local TVprogramming. Valley Vision, Inc.,Placerville, Cal., also servingfour other systems in northernCal., recently added an AmpexVR-6000 to its origination sys-tem. Robert B. Cooper, Pres.,uses the combined facilities oftwo CATV studios in Placervilleand a mobile van. Periodically,the van travels from Placervilleto Jackson, Sutter Creek, Angel'sCamp, and Sonora to recordshows for playback on any or allof the 5 systems. With the twostudios, plus the VTR, as manyas 3 different programs can befed simultaneously.

In Perryton, Tex., JamesCrouse, manager of the VTR -equipped Great Plains Communi-ty TV Co., offers its subscribersa variety of locally -originatedprograms by selling local adver-tising. Downtown merchants re-cently purchased time and tapesto promote "Crazy Days"; locallysponsored high school football

The third tallest structure indowntown Columbus, 0., thismicrowave tower rises 220' abovethe 8th floor of the Ohio Bellbuilding, (340' above the street).To beautify the structure, frame-work is covered with SculptureAluminum Panels made by Con-struction Specialties, Inc. Ver-tical framing members, also ofaluminum, accent the tower'sheight and are finished in bronze.

games have been taped for play-back the next day; and two localchurches have contracted onehour each on alternate Sundaysfor live pickup of the 11 AMService.

McAllen Cable TV Corp., Mc-Allen, Tex., has used its AmpexVR-6000 to tape high schooldances. C.E. Sharp, manager,said that the use of the tapes willeventually extend local program-ming to 6 hours a week.

A proposed cooperative ar-rangement between CATV andETV facilities will require ex-tensive use of the Ampex VTRpurchased by Time -Life for theNewburgh, N.Y. CATV system.Selected instructional and infor-mational programs produced bythe ETV system will be tapedand presented to CATV subscrib-ers. According to Dick Lubick,detailed arrangements are nowbeing worked out.

TeleMation, Inc., demonstratedthe VR-6000 ($1495) at theNCTA Miami Beach Conventionlast June and has begun shippingunits to CATV systems; recently,the firm ordered 300 G -E vidiconcameras to meet the growing de-mand for CATV public serviceprogramming and ETV systems.

CBS Gets NewMobile VansCBS -TV's recently -delivered col-or mobile unit, designed by CBSLabs, functions as a 2 -van unit.One van, with expandable sides

(up to 13') is 28' long and housesthe operations control room, avideo and audio operating area,and a video and audio systemcomponents and communicationssystem. The second van is 24'long and serves as maintenanceand storage headquarters; it con-tains a viewing room, and canaccept portable film and tapeorigination facilities. Both units

NEW HAMPSHIREEDUCATIONAL TV ,L

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A web of microwave paths fan-ning out from the Univ. of NewHampshire will cover the entirestate with ETV programming.Raytheon has been awarded thecontract to link SaddlebackMountain with Walpole, Hanover,and Littleton. Educational andcultural programs of the nationalETV network, or those originatingat WENH (Ch 11) at Durham,may be carried across state tothe 3 UHF transmitters.

are air conditioned and heated forall-weather operation and can bejoined back - to - back and sealed.The self -powered vans are capa-ble of simultaneously operating6 color cameras with a potentialof 8; control switching capabilitycan be expanded to 23 cameras.The operations van staff consistsof a director, assistant director,technical director, lighting direc-tor, audio operator, two videooperators, plus one or two main-tenance technicians in additionto the normal field crews of cam-eramen, lighting, and audio tech-nicians.

The second van contains 3maintenance benches and stores

November, 1966 - BM/E

40 Hz to 5 MHz

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7 Measurement Ranges:1/3/10/30/100/300/1000mV

Input impedance: 1MU shunted by30 pF, or 7511 bridging

APPLICATIONSMEASURE VIDEO NOISEVOLTAGE ON: TV Cameras Film Scanners Video Tape Recorders Radio Links Coaxial Lines TV Transmitters TV Receivers TV Transposers

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Principle of noise -voltage measure-ment with I -I or V internal blanking

Type UPSF Video Noise Meter is de-signed to measure the unweightedand weighted noise voltages of TVtransmission systems. It has theunique advantage of measuring lowlevel components in the presence ofhigh level horizontal or vertical syncand blanking pulses (see line draw-ing). The UPSF meets the require-ments of all U.S.A. black and whiteand NTS color systems. A bandstopfilter adjusted to the color subcarrierfrequency (3.58MHz) prevents anyresidual color subcarrier in the testsignal to be picked up. In addition tosupplying true RMS value 0.3 mV to0.3V (full scale deflection) it alsocan provide peak -to -peak value of 1mVpp to 1Vpp (full scale deflection).The UPSF can also be used as aconventional throat band VTVM.

Get The Extra Capability,Greater Reliability, andLonger Useful Life Of ... v 111

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rcle 7 on Reader Service CordNovember, 1966 - BM / E 7

hp 33/A, 332ASolid -State Distortion AnalyzersHarmonic distortion measurements, 5 Hz (cps) to 600 kHz (kc)0.1% full-scale distortion sensitivityInput sensitivity 0.3 V rms for 100% set level referenceLow -distortion output for scope or true rms VM monitoring300 1iv full-scale voltmeter sensitivity (residual noise <25 pv)Floating input, output

Use it to:Measure total broadband distortionMeasure voltage, 5 Hz to 3 MHz (mc)Measure noise and hum level as small as 50 'ivMeasure envelope distortion of AM rf carriersAmplify signals (high gain, wideband)

Both analyzers consist of a broadbandamplifier, a tunable frequency -selectiverejection circuit and a high -impedancevoltmeter. The rejection circuit providesfundamental rejection >80 db. The volt-meter measures 300 /Iv to 300 v rms fullscale, using the same terminals, attenu-ated in 10 db steps. The two instrumentsare identical except that the 332A addsan amplitude modulation detector, 500kHz to greater than 65 MHz. The ana-

1045

lyzers are value -priced, too: 331A, $590;332A, $620.

Call your Hewlett-Packard field engi-neer for a demonstration of the distortionanalyzer most useful for your application.Or write for full specifications to Hewlett-Packard, Palo Alto, California 94304,Tel. (415) 326-7000; Europe: 54 Routedes Acacias, Geneva.Data subject to change without notice.Prices f.o.b. factory.

HEWLETT hp PACKARDAn extra 1II C(1814 re of quality

almost 3 miles of camera cable,cameras, tripods, dollies, ampli-fiers, mics and booms, in addi-tion to other equipment. Thevans ride on a heavy-duty airsuspension system and utilizelarge V-8 engines allowing com-plete mobility anywhere in thecountry. Complete telephone andshortwave communications fa-cilities are provided. Designedto plug into existing telephonelines, the unit incorporates spe-cial phones in the control con-sole to give operations personnel5 private and 5 business linesconnected through normal hook-ups. Two more units are sched-uled for delivery to the networknext year.

NAB Asks ModernTransmitter MeteringNAB has asked the FCC toamend its rules to permit the useof "more accurate and sophisti-cated methods of measuring" inbroadcast transmitter metering.NAB wants the Commission torecognize digital read-out de-vices and numerical recordersusing a decimal system of num-bers.

TV Industry DataThe 1966 edition of TvB's an-nual tracking of TV industrydimensions is available from allTvB Offices. "Tv Basics #9" il-lustrates the size and scope ofthe medium and includes mediainvestments of the top 100 buy-ers, plus recognition of the me-dia's stake in public service.

TV HomesEstimate Ready

ARB has published its TV homesestimates for use during the1966-67 season. The booklet con-tains Total Homes and TV pene-tration for every county in thecountry (excluding Alaska), aswell as totals by state and by 9census regions.

TV's Role in EducationThe Fund for Advancement ofEducation has just published a96 -page book entitled "Learningby Television." Authored byJudith Murphy and RonaldGross, both of the Academy forEducational Development, Inc.,chapters include: The Unfinished

8

Circle 8 on Reader Sei,ice CardNovember, 1966 - BM/ E

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Exclusive "GO, NO GO" indicator automatically warns whenthe reverse leakage of any diode is in excess of 50 microamps.You know at a glance the exact status of your complete powersupply. Eliminate guesswork or costly test time!

Only Wilkinson Silicon Rectifiers are available in a com-plete tube replacement range of from 866 to 857B.

Wilkinson Silicon Rectifiers function in ambient tempera-tures of from -85cf to + 158°F. No need to worry aboutextreme heat or cold.

No more filament heat and consequent filament burnout...Wilkinson solid state Rectifiers lower power cost and reduceAC hum. Filament transformers no longer need replacement.

Instantaneous operation! With Wilkinson Silicon Rectifiersno warm up time is necessary.

It is economical and easy to solid state the power supplyin your high power equipment! No rewiring is necessary! Justplug Wilkinson Silicon Rectifiers into your present mercuryvapor tube socket. Filament transformers as well as othercomponents are left in place.

Only Wilkinson Silicon Rectifiers are fully guaranteed andhave a safety margin well in excess of tube ratings.

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Experiment, The ITV Enterprise, The Impact ofTelevised Instruction, The Question of Quality,ITV At the Crossroads, ITV and the Future ofAmerican Education. Copies are available withoutcharge from the publisher's offices at 477 MadisonAve., New York. N.Y. 10022.

Revised Propagation ReportThe FCC has announced that a revised engineeringreport, "Development of VHF and UHF Propaga-tion Curves for Television and FM Broadcasting,"has been made part of the record in the proceedingon Sections 73.333 and 73.699 (Docket 16004). Thereport contains basic information upon which thenew curves were drawn. Copies are available fromthe Office of the Chief Engineer, Room 802, Build-ing 521. Time for filing comments was extended toNov. 21, with replies due Dec. 6.

"Sell Like Your Sponsors"In an address at the Institute of Broadcasting Fin-ancial Management, held recently in Denver, C. A.Kellner, ARB v.p. of Station Services, pointed outthat from within a marketing orientation, "televi-sion is no longer a mass medium. Advertisers areusing the TV medium selectively and can chooseand buy those people who are the best prospects."Mr. Kellner suggested that it is in broadcasters' in-terests to take a similar selective marketing ap-proach. Through expanded audience compositiondata, the broadcaster can pin -point his station's au-dience advantages and limitations through productusage categories. Every station must compete for

TBM-4500A FM STEREO MONITOR

SOLID-STATEOur new FM Stereo monitor, the TBM-4500A hasall silicon solid-state circuitry. Some circuits useField Effect transistors which have amazing per-formance characteristics ideally suitable for monitorapplications. FM stations all over the world areordering McMartin stereo monitors- and one goodreason is the solid-state circuitry. Order yours today,or write for literature.

McMartinMarketing Manager, Broadcast

McMartin Industries, Inc.605 North 13th Street

Omaha, Nebraska 68102

advertising dollars on three levels: TV must competewith radio, magazines, newspapers, and outdoor ad-vertising; there are over 230 TV markets in whichan advertiser might wish to invest, and within eachof these markets are one or more stations throughwhich an advertiser might reach a desired targetmarket.

"New" Radio and the AdvertiserThe "select audience" trend in broadcasting is totailor programming 100% to the tastes of a givengroup. When trying to reach the total audience,or mass audience, concentrating on a single selectgroup won't do it, according to the WCLV (Cleve-land) Newsletter. Affluential adults cannot bereached with either classical or sweet pops alone;certain adults like one, others the other. Advertis-ers wanting to reach potential purchasers of theirproducts cannot distinguish between AM and FMunless they also prepare to distinguish between AMand FM listeners. Better that he think in terms ofthe listener. It becomes imperative to first determinethe type audience you want; then pick the stationor stations reaching that audience. If it's mass,you need multiple formats. You'll not catch theclassical listener on rock or sweet pops, and viceversa, nor on AM when FM is his preference.

Experimental Pay TVThe FCC has granted International TelemeterCorp. permission to increase the power of experi-mental station KM2XOG Los Angeles from 20w tolkw for the purpose of developing and testing asubscription TV system. The operation is on Chan-


PLUG-IN DESIGNElectric sockets are called "convenience outlets".McMartin's "plug-in" modular design for the TBM-4500A is certainly a convenience and is the onlydesign of its kind in the monitor field. With "plug-in" convenience it's easy to trouble -shoot and replaceany circuit, if necessary-as easy as working with a"convenience outlet". Order your TBM-4500A FMStereo monitor. or write for literature.





10


November, 1966 - BM/ E

Close to a quarter million radio path miles of micro-wave communications links have been equipped byLenkurt Electric Co. The map shows the more than500 systems equipped by the company in the U.S.and Canada.

nel 83 and there is no public participation. The firmalso operates experimental KM2XMR with 100w onChannel 5 as part of the project.

Convention Registration LimitedNAB's Convention Committee, faced with a con-tinually growing affair, has approved registrationchanges intended to enable more people to hearluncheon speeches, and to limit the amount of exhi-bition space to that used by associate members atthe '66 Annual Convention. Two types of advanceregistration will be offered: full registration, in-cluding one ticket to each of three luncheons, for$30 per person; registration good for all meetingsand exhibits, but not including luncheon tickets,

for $15 per person. Extra luncheon ticket sales dur-ing advance registration will be eliminated. Equip-ment exhibits will be limited to the four areas usedat the Chicago Hilton in '66; exhibitors will be lim-ited to the same amount of space occupied last year.Convention dates are April 2-5, 1967.

Most CATVs Carry Distant SignalsOver 90% of the nation's CATV systems receive atleast one distant signal, according to NCTA re-search. Data shows that 0.9% of the systems re-ceive only local stations (not including N.Y.C.) ;1% receive only Grade A signals; 2% receive onlyGrade B signals; 4% receive a combination ofGrade A and B signals; 25% receive no signals ofGrade A or B quality; and 67% receive an assort-ment of signals including at least one of less thanGrade B and at least one Grade B or better. NCTAconducted the study in response to a request bySen. Quentin Burdick (D.-N.D.) acting chairmanof the Copyright Subcommittee.

Video Equipment SchoolA school offering complete instruction in all phasesof video tape recording has been established byAmpex at its consumer and educational productsdiv., Elk Grove Village, Ill. The Ampex Video In-stitute will train Ampex users and service person-nel, although enrollment by those not already usingvideo equipment is also invited. Specialized train-ing categories include video recording systems andaccessories (tuition $100) and service personnel(tuition $100).


ONE SWITCHOperators like our TBM-4500A FM Stereo monitor.One reason is the hard-working left hand switchused for all metering functions - RF level, pilotinjection, left and right modulation, L R, L - R,phase angle, 38 kHz carrier suppression and AMand FM signal-to-noise ratios. Order yours today,or write for literature.





THREE METERSOne reason McMartin sells so many TBM-4500AFM stereo monitors is that the design helps theoperator do his job easier, faster, better. With threemeters left, right and TOTAL modulation can beread simultaneously. FM stations all over the worldare ordering McMartin stereo monitors. Order yourstoday, or write for literature.





November, 1966 - BM; E


TheirCourier,

Dispatcher,Transporter.

Their job:carry the signalsharp and clearright to the endof the line.

Courier solid-state pilot carrierAGC-controlledtrunkline amplifier.Low noise, high output broadband trunk -line amplifier has variable gain and tiltcontrols for accommodation of all com-monly used types and lengths of cables.The pilot carrier system enables accuratecontrol of system's gain, despite wide tem-perature variations. Internal jumpers per-mit duplexed powering of the unit fromeither end, as well as power feed-thru orstop. A zener-referenced permits transistorsupply powering by 18-30 VAC. Test jacks(-30db) provided for monitoring. Rugged,cast -aluminum weatherproof case.

Dispatcher I and Dispatcher IIsolid-state broadbandbridging amplifiersDispatcher I is for use relatively close tothe output of a trunkline amplifier andprovides a minimum of 16db gain. Dis-patcher II is for use between trynklineamplifiers, gain is 26db minimum. Eachmodel has 4 outputs with individual ACfuse for safety. Fuse removal cuts off ACpower to its output, while leaving the RFpath undisturbed. Internal jumpers pro-vide the option in powering the unit fromeither end, and of allowing power feed -through for cascading units. Variable gainand tilt controls permit exact adjustment

Lab- Line series test equipment designed especially for 75UHF/VHF sweep generator,Model 4122Finest all solid-state, all -channel sweepgenerator has two switch -selected elec-tronically swept ranges: entire UHF TVspectrum (470 to 890 MHz); entire VHF TVspectrum incl. subchannels (20-240 MHz).

Sweep widths are continuously variablefrom 5 MHz to the entire VHF or UHFrange in one sweep. Center frequency canbe tuned across the complete band oneach range regardless of the sweep widthsetting. An output level attenuator is ad-justable over 60db range. Automatic LevelControl (ALC) on both ranges assures con-stant output. Fully regulated power supply.

The sweep oscillator is varacter tuned (nomoving parts) for silent operation and longlife. For VHF output the UHF sweep ismixed with a fixed oscillator signal at 900MHz and the resultant difference signal isamplified and level controlled to cover

the complete VHF TV spectrum.

The horizontal sweep rate of 60 cps, de-rived from the power line is available asa sine wave at the front panel for connec-tion to the oscilloscope. Use of the sine -wave horizontal permits oscilloscopes tobe fed by available local line voltage forsummation sweeps of large systems.

UHF sweep generator, model 4114Same quality features as the 4122 but cov-ers range of 470 to 890 MHz only.

UHF/VHF field strength meter,Model FSM-2Only all -channel field strength meter ina single unit, solid-state superheterodynecircuitry. Accurate enough for the lab.Portable enough for field work. Instantlyconvertible from VHF to UHF with the flipof a switch. Measures RF signals at 75 ohmimpedance (VHF/UHF balun supplied for


of output characteristics, Zener-referencedpower supply permits use of duplexed 18-30 VAC. A -30db input monitor jack fortesting. Rugged, cast -aluminum case idealfor messenger mounting.

Transporter solid-statetrunkline amplifierfull bandwidth (50-220 MHz)Response is tilted to follow cable slope.Designed for cable powering by a widerange of AC voltages for flexibility in newsystems or in extending existing systems.Rugged, weatherproof, cast -aluminumcase, strand or pole mounting. Low crossmodulation, low noise output. An externaloutput monitor jack provided.

ohm cable distribution300 ohm measurements) in two ranges:VHF (52 to 216 MHz) and UHF (470 to 890MHz. Sensitivity variable from 100uv. to3v. for full scale meter deflection. Readsboth average and peak level. AC line orbattery operation. Fully regulated powersupply.

VHF return loss bridge,Model 2124Enables fast, accurate wide band measure-ment of return loss (VSWR). Especiallyuseful when the return loss is high (LOWVSWR). Covers frequency range 30 to 216MHz. Balance better than 40db.

For further details, write:

BLONDER -TONGUE9 Alling Street, Newark, New Jersey 07102home TV accessories closed circuit TV ,community TV UHF converters master TV

12 November, 1966 - BM/ E

INTERPRETING THE&

REGULATIONS

Comparative Criteria for Choosing ApplicantsDURING THE past few years, we have witnessed

a tremendous upsurge in the volume ofstandard, FM, and TV applications for construc-tion permits. In many instances, there were twoor more applicants for the same facilities,thereby necessitating a Commission hearing todetermine the best qualified applicant. ]n 1965,the Commission issued a policy statement asa future guide to be followed in the comparisonof applicants in a hearing.

This discussion does not deal with the issuescf basic legal, financial, and technical qualifica-tions to become a licensee; it is more partic-ularly directed toward the areas explored andcriteria employed by the Commission, as setforth in the policy statement, in comparing eachapplicant. These are commonly referred to as theComparative Issues.

The Commission has set forth two primaryobjectives toward which the comparative portionof a hearing should be directed. They are (1)the best practicable service to the public, and(2) a maximum diversity of control of masscommunications media.

The first objective is so obvious that it re-quires little further comment. The raison d'etreof the Commission is to insure that the broad-caster will serve the public interest. Desirabilityof the second objective has been discussed pre-viously. To wit: (1) "The Commission believesthat the better method of creating a diversity ofviewpoints in an area, through the broadcastmedium, is to grant broadcast authorizations toas many separate owners as possible." (2) "TheCommission was guided by the Congressionalpolicy against monopoly in the communicationsfield (e.g., as expressed in Section 313 of theCommunications Act), and the concept (recog-nized by the courts) that the broadcasting bus-iness is, and should be, one of free competition."

The Commission has decided that the two pri-mary goals stated above are quite compatible.Service by a broadcaster to an area implies theability and flexibility to meet the changing localtastes, needs, and interests. Since independenceand individuality of approach are elements ofrendering good program service, the primarygoals of good service and diversification of con-trol complement each other.

Diversification of Control

Diversification is a factor of primary signif-icance since, as set forth above, it constitutes aprimary objective in the licensing scheme. Asin the past, the Commission will consider bothcommon control and less than controlling interestin other broadcast stations and other media of

mass communications. Control of large interestselsewhere in the same state or region may wellbe more significant than control of a smallmedium of expression in the same community.The number of other mass communication out-lets of the same type, in the community proposedto be served, will also affect, to some extent,the importance of this factor in the general com-parative scale.

It is not possible, of course, to spell out inadvance the relationships between any signifi-cant number of the various factual situationswhich may be presented in actual hearings. Itis possible, however, to set forth the elementswhich the Commission believes significant. Itwill consider interests in existing media of masscommunications to be more significant in thedegree that they: (1) are larger (i.e., go towardscomplete ownership and control) ; (2) are in(or close to) the community being applied for;(3) are significant in terms of numbers andsize (i.e., the area covered, circulation, size ofaudience, etc.) ; (4) are significant in terms ofregional or national coverage; and (5) are sig-nificant with respect to other media in theirrespective localities.

Full -Time Participation

The integration of ownership and manage-ment is, frequently, of decisional importance. Itis inherently desirable that those with the legalresponsibility oversee day-to-day operation of thestation. In addition, with such integration, thereis a likelihood of greater sensitivity to (1) anarea's changing needs and (2) programming de-signed to serve these needs. This factor is ofvital importance in securing the best service. Italso frequently complements the objective ofdiversification, since concentrations of controlare necessarily achieved at the expense of in-tegrated ownership.

The Commission is primarily interested infull-time participation by owners in manage-ment. To the extent that the time spent is lessthan full time, the comparative credit given willdrop sharply, and no credit will be given to theparticipation of any person who will not devotesubstantial amounts of time to the station on adaily basis. In assessing proposals, in order todetermine the extent of their policy functionsand the likelihood of their playing importantroles in management, the Commission also looksto the positions which the participating owners

This section, providing broad interpretations of FCC rulesand policies, does not substitute for competent legal counsel.Legal advice on any given problem Is predicated on theparticular facts of each case. Therefore, when specificproblems arise, you uould be well advised to consult yourown legal counsel.


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propose to occupy. Also, it accords particularweight to staff positions held by the owners,such as general manager, station manager, pro-gram director, business manager, director ofnews, sports or public service broadcasting, andsales manager. Thus, although positions of lessresponsibility are considered, especially if therewill be full-time integration by those holdingthose positions, they cannot be given the de-cisional significance attributed to the integrationof stockholders exercising policy functions.Purely consulting positions will be given noweight.

Attributes of participating owners, such astheir experience and local residence, will also beconsidered in weighing integration of ownershipand management. While, for the reasons givenabove, integration of ownership and managementis important per se, its value is increased if theparticipating owners are local residents and ifthey have experience in the field. Participationin station affairs by a local resident indicatesa likelihood of continuing knowledge of changinglocal interests and needs. The importance of thisis demonstrated by the Commission's great em-phasis on program surveys in renewal and otherapplications.

Past participation in civic of fairs will be con-sidered as a part of a participating owner's localresidence background, as will any other local ac-tivities indicating a knowledge of and interestin the welfare of the community. Mere diversityof business interests will not be considered. Gen-erally speaking, residence in the principal com-munity to be served will be of primary im-portance, closely followed by residence outsidethe community, but within the proposed servicearea. Proposed future local residence (which isexpected to accompany meaningful participation)will be accorded much less weight than presentresidence of several years' duration.

Previous broadcast experience, while not sosignificant as local residence, also has rapidlydiminishing value when put to use through in-tegration of ownership and management. Also,previous broadcasting experience includes activ-ity which would not qualify as a past broadcastrecord, (i.e., where there was not ownership re-sponsibility for a station's performance). Sinceemphasis upon this element could discouragequalified newcomers to broadcasting, and sinceexperience generally confers only an initial ad-vantage, it will be deemed of minor significance.It may be examined qualitatively, upon an offerof proof of particularly poor or good previousaccomplishment.

The discussion above has assumed full-time,or almost full-time, participation in station op-eration by those with ownership interests. TheCommission recognizes that station ownership bythose who have broadcasting experience may stillbe of some value even where there is not thesubstantial participation to which it will accordweight under this heading. Therefore, a slightcredit will be given for the local residence ofthose persons with ownership interests who willdevote some time to station affairs. Similarly,a very slight credit will be given for experiencenot accompanied by full-time participation. Bothof these factors, it should be emphasized, are ofminor significance. No credit will be given either


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the local residence or experience of any personwho will not put his knowledge of the communityor experience to any use in the operation of thestation.

Proposed Program Service

The United States Court of Appeals for theDistrict of Columbia Circuit has stated that". . . in a comparative consideration, it is wellrecognized that comparative service to the listen-ing public is the vital element, and programs arethe essence of that service." (Johnson Broad-casting Co. v. FCC, 85 U.S. App. D.C. 40, 48,175 F. 2d 351, 359.) The importance of programservice is obvious. The feasibility of making acomparative evaluation is not so obvious. Hear-ings take considerable time, and precisely for-mulated program plans may have to be changednot only in details but in substance-to takeaccount of new conditions existing at the timea successful applicant commences operation.Thus, minor differences among applicants areapt to be of no significance.

The basic elements of an adequate service havebeen set forth in the Commission's July 27, 1960"Report and Statement of Policy Re: Commis-sion en banc Programming Inquiry." The ap-plicant has the responsibility for a reasonableknowledge of the community and area, based onsurveys or background, which will show that theprogram proposals are designed to meet theneeds and interests of the public in that area.Contacts with local civic and other groups andindividuals are also an important means of for-mulating proposals to meet an area's needs andinterests. Failure to make them will be con-sidered a serious deficiency, whether or not theapplicant is familiar with the area.

Decisional significance will be accorded onlyto material and substantial differences betweenapplicants' proposed program plans. Minor dif-ferences in the proportions of time allocated todifferent types of programs will not be con-sidered. Substantial differences will be consid-ered to the extent that they go beyond ordinarydifferences in judgment and show a superiordevotion to public service. For example, an un-usual attention to local community matters forwhich there is a demonstrated need, may stillbe urged.

In light of the considerations set forth above,and experience with the similarity of the pro-gram plans of competing applicants, taken withthe desirability of keeping records free of im-material clutter, no comparative issue will or-dinarily be designated on program plans andpolicies, or on staffing plans or other programplanning elements, and evidence on these mat-ters will not be taken under the standard issues.The Commission will designate an issue whereexamination of the applications and other in-formation before it makes such action approp-riate, and applicants who believe they can dem-onstrate significant differences, upon which thereception of evidence will be useful, may petitionto amend the issues.

Past Broadcast Record

This factor includes past ownership interestand significant participation in a broadcast sta-

16


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tion by one with an ownership interest in theapplicant. It is rarely a factor of substantialimportance. A past record within the bounds ofaverage performance will be disregarded, sinceaverage future performance is expected. There-fore, the Commission is not interested in thefact of past ownership per se, and will not givea preference because one applicant has ownedstations in the past and another has not.

The Commission is interested in records which,because either unusually good or unusually poor,give some indication of unusual performance inthe future. Thus, it will consider past recordsto determine whether the record shows (1) un-usual attention to the public's needs and in-terests, such as special sensitivity to an area'schanging needs through flexibility of local pro-grams designed to meet those needs, or (2)either a failure to meet the public's needs andinterests or a significant failure to carry outrepresentations made to the Commission.

Character

The Communications Act makes character arelevant consideration in the issuance of alicense. Significant character deficiencies maywarrant disqualification, and an issue will bedesignated where appropriate. Since substantialdemerits may be appropriate in some cases wheredisqualification is not warranted, petitions toadd an issue on conduct relating to characterwill be entertained. In the absence of a desig-nated issue, character evidence will not be taken.The intention here is not only to avoid undulyprolonging the hearing process, but also toavoid those situations where an applicant con-verts the hearing into a search for his oppon-ent's minor blemishes, no matter hcw remote inthe past or how insignificant.

Other Factors

As the Commission has stated, its interest inthe consistency and clarity of decision and inexpedition of the hearing process is not in-tended to preclude the full examination of anyrelevant and substantial factor. Thus, it willfavorably consider petitions to add issues when,but only when, they demonstrate that significantevidence will be presented.

Past experience has shown that hearings haverun for long periods of time because of thenumber of areas of comparison. The Commis-sion's new guidelines of July 28, 1965, "PolicyStatement On Comparative Broadcast Hearings,"is an attempt to (1) formulate a higher degreeof consistency of decision and (2) prevent un-due delay in the disposition of comparativehearings. As is evident from the foregoing dis-cussion, the various factors cannot be assignedabsolute values; some factors may be present insome cases and not in others, and the differ-ences between applicants with respect to eachfactor are nearly countless. Nevertheless, it be-hooves all parties who are interested in applyingfor new broadcast facilities to keep these com-parative criteria in mind. Additionally, consul-tation with an attorney well versed in the prac-tice of communications law is essential to obtaina realistic appraisal of one's chances in a givencase.

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Planning a 100 -kw FM

By L.D. Ewy

Here's how KOFM planned its programmingaround both automated and live operation.

ON OCTOBER 4, 1965, KOFM radio beganequipment installation in a new modern

building, housing offices, studio and transmit-ter. Proof - of - performance measurements werecompleted 40 days later. On November 15, 1965,the station received program test authorizationand began regularly scheduled programming.Responsibility for the relative speed in whichthe 20 -kw transmitter, 32 -bay antenna (1425'high on TV tower) 10 -channel stereo console,SCA background music service and programautomation system was installed must be attrib-uted to careful planning.

Planning MotivesThe building, designed to encompass the en-

tire KOFM broadcast operation plus space forthe Sonax Corp. (background music leasee), isconstructed of insulated concrete blocks, pouredconcrete floors and a flat insulated tar paperroof. During the initial planning stage, tenta-tive equipment locations were blocked -in on afloor plan layout, thereby allowing each individ-ual to visualize the working relationship of eachintegral part of the operation. In so doing, pos-sible layout errors were eliminated on paperand a flexible and efficient overall installationwas achieved.

Offices, control room, and studio are carpetedand remaining areas are tiled. The rather largeproportion of partition window area simplifiesroutine operation and saves a lot of steps. Thestudio area is visible from the control room,enabling close operator -talent contact. The studiois equipped with mike outlets, monitor speakers,intercom, and a large table and chairs.

The transmitter is visible from the engineer'soffice/working area, allowing transmitter obser-vation during the time this office is occupied.The automation system, transmitter, and rackequipment are visible from the audio consoleposition. Because we wanted to create a good

Mr. Ewy is Chief Engineer, KOFM, OklahomaCity, Okla.

impression with a visiting client or a casualvisitor, the reception area received special at-tention with lounges, floral decor, and contem-porary lighting.

Construction ProcedureWork on the control room was started first.

The audio console and recording facilities hadto be completed so music tape library produc-tion could be started. All audio wires and RFcables were labeled and logged as to origin andtermination as work progressed. Needless tosay, left and right audio channels must be dis-tinguished and polarities observed. Also, high,low and medium level audio circuits were care-fully isolated.

We decided to eliminate the typical studiopatch panel and tie all audio inputs directlyto the console. This was done to minimize op-erational errors. However, all major equipmentinputs and outputs and those convenient forproof -of -performance measurements are nor -mailed through a patch panel. Before rack in-stallation, the patch panel and associated termi-nal block was assembled on a jig. This methodproved very convenient and error -free.

Due to the cost of running primary cable, ACpower to the transmitter runs through a 3"conduit buried beneath the floor and termi-nates in the trench beneath the transmitter (seefloor plan). A 3/4" conduit is imbedded in thefloor between the control room and studio toallow for further expansion. A 3/4" conduit alsoruns from the trench near the console to thecontrol room ceiling and is used for audio dis-tribution to monitors, cue speakers, intercomsand on -air lights. Conventional trenching accom-modates cabling between the transmitter, auto-mation system, subcarrier operator and console.

The automation system with its accompany-ing pre-cut and labeled audio and control cableswas easily assembled. It was squared away overthe trench, and AC was run to complete thisportion of the installation. The transmitter isalso installed over the wiring trench and iscooled by filtered air brought in through a 24"inlet cut in the outside wall to the rear of the

20November, 1966 - BM/E

SONAXGEN. OFFICE

SONAX RECEPTIONAREA

SONAXSTORAGE

CLO

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GENERALMANAGER

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Modernistic reception area greets the KOFM visitor.

Uncluttered control room environment advocates effi-cient production from record and tape sources as wellas live pickup from the adjacent studio.

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Floor plan provides step -saving efficiency androom -to -room equipmentvisibility.

The Management Viewpointby G. B. (Bill) Harrison. General Manager

Can technical excellence bring success to an FM stationin the Southwest? Without question, technical superiorityin the areas of sound and sIgnal strength is a major factorin KOFM's success. From the moment of KOFM's concep-tion, the overall objective was to present to the radio audi-ence of Oklahoma City and the State of Oklahoma the finestmusic available. How would this be achieved? We felt thatautomation was the key. Automation allows the stationto control the style of music presented to the listener. Thisprogram control centers itself around the proper blendingof musical styles and specialized musical programs such asclassical music, folk music and jazz. At this time KOFMis the only station in Oklahoma City that has regularlyprogrammed classical music_ After 9 months of operationKOFM is one of two FM stations shown on the ratings. Wewould assume from the rapid growth in our audience thatKOFM's decision to use automation has been the right one.

Any station management must face two real problems:operating costs and sales. KOFM-because of its technicalsuperiority-had tangible advantages to offer The SonaxCo., a background music service. In addition, Sonax oper-ates as a wired communications distributor and systemengineering entity. Therefore, in planning our building, weincorporated additional space to house the Sonax generaloffices and equipment. With this company providing col-lateral revenue for space and use of our subcarrier, KOFMhad an initial fixed income that lowered operating costs.

While KOFM receives applause from the communicationsindustry for its sound quality and signal strength, this ap-plause does not guarantee sales. A sales story must be de-veloped in order to answer such questions as: Who is youraudience? Where do they live? What's their income? Whatis your coverage area? What is ycur rating? How many homeshave FM receivers? These are some of the typical questionsasked of FM. We set out to get answers to these questionsby our own promotions and research, talking with theChamber of Commerce, joining the National Association ofFM Broadcasters (which is a major source of information),by joining the rating service and other means. Along withgathering this material we began to advertise KOFM. Theadvertising was designed to create a personality for thestation, nct the individuals.

Technical superiority, sound programming, advertising anda selling proposition has created talk within the market.Talk creates momentum and momentum creates sales.


Automation vs Live Programming

by Dick WilkinsonProgram Director

The KOFM plant is built around our automation systemwhich, in addition to simplifying maintenance procedures,aids in maintaining a better on -the -air sound. We choseautomation over live programming because we felt it wouldprovide more efficient program control and enable us touse air personnel more effectively. A popular thought is thatautomation is used to save money by eliminating air per-sonnel. On the contrary, at least at KOFM. just as manymen are needed, but we save money by utilizing our an-nouncers more effectively. On -air work such as selectingrecords, time checks, selecting commercials and stayingat the console has been eliminated. The time is spent pre-paring mistake -proof material for the automator.

Program control is accomplished by having correct on -the-

air music 24 hours a day and regulating the amount ofcommercial and announcer interruptions. Once we becameused to our automation system, this control was simple toaccomplish and we did not have what automation criticswould call "canned" sound. Automation is our answer tothe old problem of controlling program material and to in-troducing rapid change if and when necessary. The resultis that ingredient we call "Program Integrity."

KOFM Equipment

Collins 830 H 1A 20 -kw transmitterLTV multideck tape transportCollins antennasSchafer automation system including:-Schafer CU -8S control unit with remote control-6 Ampex PB-351-2 decks-Audio clock and 2 Ampex PB-351 (time announcer)-SA 100 commercial spotter with M-50 memory unit, re-

mote controls and Ampex 354 deck.-MU 80 make-up unit with remote controls and Ampex

351-2 decks.-2 Crown Series SS 800 program recorders with monitor

alarm unit.Moseley Model SCG-4 SCA generatorGates Executive audio console mounted on 36" by 84" desk

top with double and single turntable pedestals.2 Gates turntables equipped with Shure SME Series 11

pickup arms.Shure M 44-7 cartridgesMcIntosh C22 preampsGates Playback CartritapeGates Playback and Record Cartritape with remote controlsSony Model 77-4 tape deck with remote controlsSony Model C -37A condenser microphoneNeumann U-67 condenser microphoneGates Top Level limiterCollins 26U1 limiterCollins 26U2 limiterMcMartin TBM 3000 frequency meterCollins 900 C-1 modulation monitorMiratel E.B.S. monitorHorizontal -37M-16 with .6° beam tilt and null fillVertical -300-16 with .6° beam tilt and null fill

transmitter. A metal hood, with an exhaust fan,was fabricated and placed over the transmitter.A ground buss, terminated at the water well,provides a common ground for equipment.

Antenna MountingIt was decided to sidemount the KOFM an-

tenna on KOCO-TV's tower with the very topof the antenna at or near the top of the sup-porting structure. However, design analysis bythe tower manufacturer showed that excessiveloading would result unless the added torquewas eliminated. Consulting Engineer Robert Sil-liman came to the rescue with a solution ofmounting the antenna in a manner creating 0torque.

We anticipated some trouble in mounting thepower divider to these specifications, due to theexisting elevator cables, transmission lines andtower members. By careful measurements andplotting at ground level we determined the leasttrouble -free method of mounting the power di-vider and routing the feed line. The top of thehorizontal antenna is mounted at 1425'. Thetransmission line is 3" heliax, wrap -locked to atower leg every 6 feet. The VSWR is down to alow 1.02, due to the absence of sharp bends inthe line and a short 30 -ft. horizontal run witha sweeping 90° turn up the tower.

The antenna's 16 horizontal and 16 verticalbays are interspaced and modified for 6° beamtilt and null fill. 100 kw ERP is radiated inboth horizontal and vertical polar planes. Wehave not yet completed field strength measure-ments, but we have had consistent omnidirec-tional from 120 to 180 miles. Skips toCalgary (Canada), Omaha, and Sioux City have.been reported.

Programming & OperationUpon completion of the installation of control ,

room equipment, the program director began re-cording music for our tape library so that a suf-ficient number of tapes would be on hand atsign -on. The MU 80 portion of the Automatorwas utilized for this purpose. On tapes intendedto program the bulk of our day, various musicalstyles are blended in accordance with our for-mat. Highlighting our program schedule arespecialized programs catering to the tastes ofclassical, folk, and jazz devotees.

Several innovations, designed to increase op-erational flexibility, were incorporated into ourinstallation. A high impedance audio bridge wasinstalled at the audio output of the Automatorand fed to a separate pot on the console. Thisenables us to fade and integrate certain programelements from the Automator during live pe-riods. A bridge was placed on the remote -con-trolled spotter, allowing any announcement onthe spotter tape to be played back through theconsole during live operation. Also, spots re-corded from the console can be auditioned. Thesame bridging technique was applied to the MU80 make-up unit and #5 playback deck to assistin dubbing.

Since we wanted to be able to go live fromthe console at a moment's notice, an audio relaywas installed to interrupt the Automator's nor-mal feed to the transmitter. By the simple flip

L

22 November, 1966 -BM/E

Audio processing, monitoring, and accessoryequipment rack is located adjacent to transmitterroom door over wiring trench.

The Schafer automation system is used for major pro-gram segments but may be immediately interrupted forlive operation. SCA generator is located directly be-hind the automation gear.

Convenient automation system, turntable, and tape recorder re-mote controls on the operator's right simplify periods of liveprogramming as well as production.

of a switch at the console position, live or au-tomated feeds can be selected. The audio consoleand automator were both adjusted for equaloutput of 8 VU. The spotter containing com-mercials and promos, the complete Automator,the MU 8, are all remote controlled with audioappearing at console inputs, and can be usedduring live operation.

To provide a positive off -the -air alarm, a sys-tem utilizing the modulation monitor, programlogger, and the monitor alarm was designed.The program logger is fed a mono signal fromthe modulation monitor. The audio output ofthe program logger controls the monitor alarm.In this manner any audio interruption of 40seconds duration anywhere in the entire systemwill activate the alarm.

Turntable start and stop functions are remotecontrolled from the console by a momentarycontact switch which energizes a latching relay.Our operators like this convenience.

A left- and right -channel audio feed is takenfrom the modulation monitor and fed to a spareposition on the audio console monitor. This en-ables the operator to monitor the off -air signal.Stereo audio feed for building monitors is pro-vided by an inexpensive stereo amplifier withan added isolation transformer bridged at themodulation monitor output. Three pilot lights,mounted in a small "mini box" near the console,notify the operator of an EBS alert, overmodu-lation and an off -the -air condition.

Eliminating the "Bugs"There was the usual run of equipment mal-

functions: noisy resistors, temperature -sensitive

November, 1966- BM/E 23

PROGRAMRECORDER

CLOCKS

TAPE DECK5,6 8 7

TA PE DECK2,3 8 4

CONTROLUNIT

SA100COMMERCIAL

SPOTTER

SCA ITAPEDECK

RELAY

SCAALARM

SCARX

26WLIMITER

26U2LIMITER

TOPLEVELLIMITER

SCAGEN

RANSMITTER

PA NO.1

EXCITER

PA NO.2

MU -80TT NO.1

aAUDIO PRE -AMP

CONSOLE

SONY777

TT NO.2a

PRE -AMP

MOD.MONITOR

FREQ.MONITOR

PLAYCARTRIGE

NO.1

BEEPERPHONE

AUDIO

P RAMP

CARTRIGENO.2

Block diagram shows inter -equipment wiring.

19.2°

TRANSKSSIONLINE

LEG

--ANYENNAFEED

UIVIJER

\ 37.2°

LEG

TV tower cross-section shows

I CENTER OFFORCE

--VERTICALDIPOLE

4" 1 TRANSMISSION

N I LINE

LEG

HORIZONTAL

FM antenna and feed line

<I

mounting.

tape transport capstan speed, two transposedblack wires, loose and unsoldered connectionsand miscellaneous problems. A prompt call tothe equipment manufacturer proved to be agreat asset with unfamiliar equipment. Often,they have had the complaint before and the cureis on the tip of their tongue.

Main -channel modulation was a source oftrouble initially. Due to FCC required 75 usecpre -emphasis in the transmitter the high audiofrequency content created objectionable cross-talk at high modulation levels. This was reme-died by lowering the main channel modulation.Later, in order to raise the modulation level,a frequency sensitive 2 -channel limiter was in-stalled ahead of the transmitter at the outputof the conventional stereo limiter. This mini-mized our crosstalk problems and normal modu-lation levels were obtained. However, since vari-able equalized turntable preamps were used, wehave to be very careful to not add any excesstreble boost during live recording (our decksare flat within 2 db to 15 kc) or the purposeof the frequency -sensitive limiter is defeated.

To achieve the "best in town" audio fidelityin the SCA system, we encountered and solvednumerous problems. There is an audio pause ofapproximately 10 to 15 seconds between musicselections on the SCA music tape. It was decidedto mute the subcarrier generator during thesepauses to completely eliminate all traces ofcrosstalk. Muting the SCA system created twomore problems:

1. If the squelch control on client receiverswas advanced too far, a very objectionable"splat" occurred as the RF carrier was cut off.To correct the problem, the squelch was ad-justed to the very edge of carrier reception andthen advanced about 10°. This eliminated thesplat and carrier cutoff can not be detected.

2. The line feeding the generator must beabsolutely quiet. The preamps in the tape deckmust be hum -free and correspondingly quiet,otherwise the SCA generator muting circuitwould interpret this as audio, resulting in erraticmuting.

After a few SCA equipment failures an alarmwas constructed and installed. It is bridgedacross the output of the SCA receiver normallyused for monitor feed, and is designed so thatit takes about a 6 -minute loss of audio beforeit rings. This delay was necessitated by the longleader tape at the beginning and end of eachreel and the accompanying loss of audio.

The pre -emphasis circuit in the generator wasclipped out for better modulation control. Thisdid not lower the fidelity and supresses out -of -band emission. These steps remedied our SCAproblems, and as a result, many customers arenow enjoying a low cost background music serv-ice. Reception up to 175 miles is reported bySonax Corp.'s Bob Sherwood.

The construction of KOFM reaffirmed the im-portance of careful planning. We not only com-pleted the job in a minimum of time, but con-tinue to benefit in daily operating efficiencyand convenience. By adhering to the manufac-turer's recommendations, our program automa-tion system produces the "live" sound we desireand also affords an instantaneous live operationcapability.


Cincinnati TVs"New World of Tomorrow"

By Bill Dawes

Anyone planning new or expanded TV facilities will get somegood ideas from this report on a forward -thinking station.

THIS WINTER, WCPO-TV willmove into a $3 million resi-

dence which will provide Cincin-nati with a modern color TV pro-duction facility. Called the "NewWorld of Tomorrow," the newlyequipped WCPO-TV home willprovide production and operation-al capabilities second only to net-work origination centers.

Building DesignScheduled for occupancy some-

time next February, the new edi-fice is designed to complementthe image and spirit of the newCincinnati. The 2 -story structureis located between 5th and 6thStreets and Central Avenue on ahalf city block of land adjacentto the new Convention Hall in theQueensgate redevelopment area.The location is readily accessiblefrom all main streets and thor-

Mr. Dawes is director, Promo-tion/Publicity, WCPO-TV Cin-cinnati, 0.

oughfares in the Cincinnati area.Constructed of steel frame and

concrete, the approximately 150x 140' building will house studios,production, technical, and officefacilities. Exterior wall surfacesare to be exposed concrete ag-gregate - created by sandblast-ing the finish'ed concrete - tomatch the appearance of Conven-tion Hall.

The more than 40,000 sq. ft.floor area will be heated by gas -fired hot water with forced aircirculation. A 200 -ton air condi-tioner will cool and ventilate theentire structure. Estimated costof the building alone is $1.2 mil-lion; with land and equipment,the total cost is expected to be inthe neighborhood of $3 million.

Studio DesignAfter witnessing the burgeon-

ing growth of the past fill thepresent facility beyond capacity,WCPO-TV management called for5 times more production space

in the new building. Two com-plete studios with individual con-trol rooms will enable the staffto develop bigger and better colorproductions. Studio A, which is50 x 70', will have folding bleach-er -type seats - extending to a17' depth when opened - withseating capacity for 175 people.Studio B will have a completekitchen set in its 40 x 50' area.

In each studio there will be arevolving type cyclorama for rap-id set changes. In Studio A thecyclorama will extend around al-most half the wall area; in StudioB it will cover about a third ofthe wall area. By installing thecyclorama sets, production crewtime will be cut significantly,thereby permitting more efficientproduction with a greater varietyof settings. Suspended scenerywill be installed in each studio,making rapid changes possible by"flying -in" various panels. Eachstudio will also have a rear -screen projection system to in-crease production versatility. For

Architect's sketch of Channel 9's "New World of Tomorrow."Sketch of Cincinnati's new Convention Hall is to the left.


convenience and necessity, num-erous camera and mic outlets willbe located around studio walls toaccommodate video and audiopickup in any part of the studio.A 30 x 50' prop storage area-with studio height ceiling-is lo-cated adjacent to both studios.

EQUIPMENTRACKS

j MICROWAVE

TECHNICALV:ORKSHOP

0VIDEO TAPE

F LMISLAND

OPERATORSCONTROLPANEL

DOD

Technical Facilities

All major equipment will benew, providing complete live,film, and tape capability-all incolor with 4 studio cameras, 4video tape recorders, and 2 filmislands. With emphasis on all -

MASTERSWITCHING

FILMISLAND

MONITORS

VIDEO SWITCHER

VIDEO CONTROLS

C LORAM

AUDIOCONSOLE

DIRECTOR

=0 -E -0 --CONTROL ROOM "B"

r

STUDIO40' X

I GHTONTROL

LIGHTING BATTENS

nANNCR

color programming, WCOP -TVengineers designed the new facili-ties for optimum color operation.Video processing, switching, cam-era, in fact, all video cabling, hasbeen carefully designed - alongwith lighting and lighting con-trol equipment-to recommended

MONITORS

AUDIOCONSOLE

KITCHEN SETAREA)

PROP STORAGE30' X 50'

DIRECTOR VIDEOSWITCHER

CONTROL ROOM A

ANNCR

FOLDING BLEACHER UNITS FORAUDIENCE SEATING. OPENS TO17' DEPTH

LIGHTCONTROL LIGHTING BATTENS

STUDIO "A"50' X 70'

CYc LORAmA

I_ is\Sketch of technical center & upper studio (top) studio floor area (bottom).

EXTERIOR WALL


21' X 9. WALL

FIREDOORAREA

(VTR

TK-42

VTR

COLORMONITOR

17"

PGMI

TK-27

14' APPROX

COLORMONITOR

17"

PGM 2 0

o COLORAIR RCVR 18

19" TK-27

21

TK-42

VTR

( )TK-42

(VTR

TK -21 1"(--- 31/2 APPROX

3 /2' INTERCOM AUDIO CONSOLE INTERCOM VIDEO SWITCFER

15. OPER. TABLE

Sketch of Control Room A console and monitor bank.

221

NET TK-42 TK-42

BaWMONITOR

COLORMONITOR

[COLORMONITOR

8 8 o 8

17" MONITORS ONWALL

VTR VTRCOLOR

MONITORCOLORMONITOR

8 8 8 88" MONITORS aWAVEFORM MONITORS

2' 4"CLEARANCE

NOMINAL

000000

21' 4'

161/2'

3' BETWEENTABLE 8 ANN BOOTH

AM -

PGM I

'COLORMONITOR)

8 o

T K-27

ICOLORMONITOR

8

0 la 0 0 0 Ca

19"COLOR OFF

AIR RCVR

PGM 2

COLORMONITOR

8

TK -27

COLORMONITOR

0 n . . . . . 0 0

THREE 20" CONSOLE HOUSINGS

VIDEO SWITCHER

TK-42

COLORMONITOR

8

VTR

COLORAAOMTO

g g

TK -42

COLORMONITOR

g

VTR

COLORMONITOR

8 8

TK -21

8/9WMONITOR

8 8

Sketch of Control Rcom B consoles and monitor bank.

manufacturer and industry speci-fications.

Studio EquipmentFour RCA TK-42 color cameras

will be used for live studio pick-up, providing adequate cameraequipment for simultaneous pro-duction of a live program andrehearsal or recording of anotherprogram in the adjacent studio.In addition to the master switch-er in the telecine area, eachstudio will have a separate SarkesTarzian video switcher and audiofacilities operating in an inde-pendent control room. To furtherbroaden production capability,each video switcher will have itsown Telechrome special effectsgenerator.

For maximum operational flex-ibility, each control room and itsswitching and control center willoperate entirely independent ofthe other. For example, duringthe broadcast of a network ortaped program, another show ora number of commercials may betaped or rehearsed in either orboth studios with any desiredspecial effects or film segmentsintegrated into the proper pro-gram or commercial.

LightingStudio lighting was designed

specifically for color productionwith an illumination of up to 350ft. candles available anywhere ineach studio at 3200°K. Virtuallyany lighting effect, pattern, and

3'

4' NOMINAL

New Major Equipment

4-RCA TK-42 live colorcameras

3-Sarkes Tarzian VideoSw tchers

2-Sarkes Tarzian Audio Con-soles

30-Conrac Monitors (18 arecolor)

4-RCA Video Tape Recorders2-Film Islands: Each includes

one TK-27, one TK-21, 16mmprojector, opaque projector,slide projector.

12-Video source picture andwaveform monitors and con-trol consoles

1 -2 -way RCA microwave STL


illumination level will be attaina-ble with an electronic lightingcontrol in each studio.

A total of 350 fixtures-mostlyquartz - have been allotted toeach studio. Ceiling fixtures willbe suspended from 22 battens inStudio A and from 14 battens inStudio B, providing the mobilitynecessary for uniform lightingover the entire area of each studio.

Control EquipmentEach control room has provi-

sion for a director, audio engi-neer, and announcer to facilitateindependent production from itsassociated studio, plus videosource availability from all cam-eras, film islands and VTRs. Con-trol Room A will have a 15 -ft.operations table with audio engi-neer and switcher operator flank-ing the director's chair. The mon-

itor bank will comprise 14" blackand white video source monitors-one for each source-and two17" color line monitors. (Two in-dependent program lines will runto the master switcher, one fromeach central room switcher.)

In Control Room B, the audioconsole and director's console willbe positioned directly behind thevideo switcher desk and videocontrol center. Three 20" videocontrol consoles will be located-in a lazy U-on either side of theswitcher with facilities for 12video sources (4 live camera, 4film camera, 4 VTRs). The mon-itor bank facing the operatorswill consist of 17" color videosource and line monitors. Eachcontrol room will have a 19" off -air color monitor, for a total of15 Conrac monitors in each bank.

The Sarkes Tarzian audio con -

Ground -breaking ceremonies were held last February 11.Participating were (I. to r.) Walton Backrach, Mayor ofCincinnati; M.C. Watters, exec. v.p., Scripps -HowardBroadcasting; Robert Gordon, v.p. and General Managerof WCPO-TV; and Charles Scripps, Board Chairman, E. W.Scripps Co.

Taken Aug. 31, 1966, this photoshows some of the building'sstructural features. The sub -graderectangular section (concreteforms) will house showers, lockerrooms, power entrance, heatingand air conditioning plants, etc.

sole installations have been de-signed to provide reverberation,re-entry, and studio feedback. DCvoltages will remote -control asso-ciated amplifiers, relays, etc.,which will be rack -mounted inthe telecine area. The dual inter-com system will be capable ofregrouping-by means of trans-fer keys - communication lineswith any area or group of facili-ties in combination with eithercontrol room.

In the telecine area, space isprovided for the master videoswitcher console, two multiplexedfilm islands, four RCA video taperecorders, and 16 equipmentracks in which pulse and subcar-rier generators, video and audiodistribution systems, etc., will bemounted. Plans call for the avail-ability of two separate and simul-taneous film camera video sources

f.

WCPO

News Director Al Schottelkotte discusses details of a

news story with members of the Cincinnati Police Dept.


One of three Mustang Fast -Back newsvehicles. A red -and -white point jobreadily identifies the cars to policeand fire officials.

Al and Wanda Lewis have developedthe "Uncle Al Show" into the tri-statearea's most popular kiddies program,now in its 17th year.

from each island. One TK-27 colorcamera and one TK-21 black -and -white camera will be installed ineach island for film pickup, andfor stills and slides; an opaqueprojector and 35mm slide projec-tor will also be included.

Each VTR will have a 6 x 17input switcher for productionmakeup, independent of studioand master switchers, therebymaking it possible to record fromeither studio or to dub from anysource in combination with anydesired special effects. A switch-er in the pulse and subcarriergenerator systems will delegateand route signals in any combin-ation to any installation from anyof three generators.

Also located in the telecinearea, a master clock - contin-ually locked -in with WWV by anoff -air receiver - will maintainthe accuracy of numerous slaveclocks throughout control, studio,and office areas.

WCPO-TV will continue to usethe present Symmes St. transmit-ter site. Programs will be fed bytelephone cable from the newstudio master control; an RCA 2-way microwave STL will back upthe land line studio -to -transmitterfeed and also beam remote pick-up broadcasts from the transmit-ter to the studio. The mobile unitantennas and STL microwavedish are mounted on the 1749'(above sea level) TV tower.

ProgrammingWhen operation begins in the

new building, all locally -origi-nated programs and all locally -produced commercials will be incolor. Planned studio facilitieswill provide a variety of settingsfor news, domestic scenes, etc.,including a permanent up-to-datekitchen set in Studio B. Whencombined with planned specialeffects, the producer will be ableto provide viewers with networkcaliber local programming andlocal advertisers with networkquality commercials.

Props and characters for pro-grams such as the "Uncle AlShow" - for 16 years the mostpopular kiddies' show in the tri-state area - may be designedand produced in a workshop andart department to be located inthe studio wing. This will offerproducers a greater choice andspeedier prop design and con-struction at more economicalcosts. While management will notdisclose any specific details at

this point, it is known that therewill be a significant increase inaudience participation shows andstepped -up emphasis on local pro-gramming (the reason for thebleacher seats in Studio A).

WCPO-TV has always felt anobligation to program timely andinformative local news; present-ly, more local newscasts are car-ried on WCPO-TV than on anyother tri-state area station. Inthe new facilities, news depart-ment activities will center at ahorseshoe -shaped news desk lo-cated adjacent to the wire room.The gathering and writing activi-ties of the 17 -man staff will bedirected and coordinated fromthis center. The more compact ar-rangement is intended to pro-mote closer collaboration of theinside staff, enabling better andmore complete preparation andanalysis of story details necessaryfor in-depth presentations. Withthe inauguration of the new op-eration, the number of local news-casts will also be increased, aswell as the intensity and scopeof news coverage.

Seven outside newsmen con-stantly cover the area. Three 2 -way radio cars provide fastbreaking details of local storiesto both radio and TV. Both 16mmmotion picture and still colorphotography are used to presentvisual action; color films will beprocessed in the station's filmand screening department. A mo-bile van equipped with color cam-eras is used for remote pickup ofimportant local activity and occa-sionally, when expedient, fornews work.

The FutureWith a staff of 172 employees

and a new $3 million facility,WCPO-TV plans to offer the Cin-cinnati area a totally new TV con-cept of local color origination. Asis the case with many of the"original" TV stations, Channel9 Cincinnati has out -grown itspresent hcme, and as a resultmany undesirable restrictionshave been imposed on manyphases of production activity. Af-ter the move to the new building,there will be an increase in com-munity affairs participation withemphasis on public service andlocal news. WCPO-TV's goal is toprovide tri-state area viewerswith the best attainable enter-tainment and information pro-gramming, geared to the "NewWorld of Tomorrow."

November, 1966- BM/E 29

Planning a NewBroadcast Building

By Joseph D. Coons

Planning a new Thome"? Here are some of thefactors to consider.

IF THE TIME has come whenyou believe your station is

ready to erect a new building, thetime has also come for some ex-tensive planning and investiga-tion. Building design requiresconsideration of many elementsand principles, and if any areignored or overlooked, you mayend up with painfully visible orfinancial reminders.

Design ConsiderationsA broadcast facility should be

housed in a building endowedwith unique characteristics. Thisaxiom necessitates careful plan-ning by you, your architect, andthe contractor.General requirements are:1. Studio acoustics and construc-tion2. Audio and AC wiring3. Traffic patterns4. Heating and cooling systems5. Inter -room visibility6. Financing and design costs

Each of these areas must bepondered as you plan each phase

1-7 r

Floor plan shows step -saving acces-sibility between various departments.

Mr. Coons is pres. and generalmanager of WOHI-AM-FM E.Liverpool, 0.

of your new quarters, if you aresure you have checked each plan- electrical, heating, cooling,floor plan, foundation - withthese items in mind, you willhave a completely satisfactorybuilding.

Studio Acoustics andConstruction

Most books on studio acousticswere written in the 40's. Sincethen, however, there have beenremarkable changes in materials,costs, and particularly in micro-phones. The result of thesechanges caused us to seriously re-view studio construction methodsin a search for the best designwithin our economic means. Byadopting cardioid dynamic micro-phones as a standard, we wereable to minimize concern for theeffect of sound reflective glasssurfaces which tend to causeechoes. The decision on micro-phone type was made before anyothers were possible, and also re-quired us to have a console with

a sufficient number of mike in-puts, since - if you want op-timum pickup quality - only oneperson can use a cordioid micro-phone. Our console handles 6microphones simultaneously; weuse that many quite often due tothe comparatively high percent-age of talk programming in ourformat.

We also decided to carpet eachstudio. Although this adds to theoverall cost of the building, thecarpeting is placed directly onthe concrete floor and so savesthe cost of tile; maintenance costsare lower, too, since vacuumingis easier than sweeping or wax-ing. The carpet also deadens theroom.

As in virtually any officebuilding constructed these days,the WOHI building uses sus-pended ceilings in which 2' x 4'panels lay in a T -bar framework.Instead of ending at ceiling level,partition walls are carried pastthe ceiling to the floor of theroom above, in order to eliminatesound transmission. This is notexpensive; masons simply slap inconcrete blocks and mortar. Thepartitions are neither seen norbear any weight above the ceil-ing line. In window construction,however, we were forced to usetraditional radio station con-struction. Two unparalleled panesof plate glass are used. Doorsare the heavy type acoustic de-sign with insulated center panels.Doorways, of course, are theweakest potential link in soundinsulation, and the rather signifi-cant door investment was deemedworthwhile.

immummiu

1111111111111 IN 0 14 I

11 71'111111spourimmil

iArr-. =_/--/- ---- - - - 'jann 1.9

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Glass dominateddominated facade attracts passerby. Call letters arelighted.

neon back -


Chief Engineer George Kelly at the master control console.Monitor panel switches on left select network, mobile receiver,or program lines 1 and 2.

Concrete block partition con-struction has several advantages:cost was kept down, the roughsurface offers natural acousticproperties, and the great massof the walls virtually eliminatesvibration. If wood and plaster ordrywall construction were used,double walls would have been nec-essary in order to eliminate themechanical transmission of soundfrom room to room. Block cellsare filled with Zonolite, a stand-ard insulation. The "stack bond"style of block -laying was used sothat block cells were exactlyaligned in complete vertical col-umns for the entire wall height.If the more conventional stag-gered row or lap method hadbeen used, we could have endedup with inaccessible block cells,thereby prohibiting complete in-sulation. Stackbond constructionalso makes a better appearancewhen the walls are painted.Prior to painting, a filler wasnot applied to the studio walls;it was omitted to preserve asmuch of the block's rough surfaceas possible. Last but not least,the ground floor location providesa vibration -free base for turn-tables, news machines, etc., thisis useful not only to keep noisetransmission down, but it alsoavoids mounting problems.

Audio and AC WiringA radio station is, in essence,

a lot of equipment interconnectedby wires. Most engineers do neatinitial installation work, regard-less of the conditions under whichthey must work. It is the subse-quent additions that usually causethe problems. Any installation, ofcourse, requires the usual stand -

In the general office area, traffic girl JoAnne Brown(foreground) and Angie Frank plug away at their tasks.Studio area is to the right, office and sales to the left.

girds of good engineering - aquality common ground system,effective shielding from interfer-ing fields, reliable and accessibleterminal systems, etc.

In our building, audio wiringwas a primary design concern.We reviewed various troughs,raceways, under -floor ducting,etc. But we chose a rather differ-ent piece of hardware. On studiowalls, we mounted a wiringtrough of the type used by elec-trical contractors to tie togethermajor switch installations andpower panels. Available in a va-riety cf sizes, this duct or chan-nel comes in short sections about36" long, plus elbows, ends, re-ducers, etc. We mounted the wir-ing trough on the second courseof block above the common studioand shop floor so that connec-room.

In addition, the 4" x 4" sizewe chose has enough room forcabling as well as pyramid termi-nals mounted inside the duct it-self. We installed a pyramid atthe duct entrance in each roomand a duplicate of the terminalin the shcp. All high- and med-ium -level cabling is cross -con-nected at the shop. In otherwords, no cables (except low-level audio) run directly from oneroom to the next; they go fromone rocm, to the shop, then tothe next room. This makes fu-ture audio rewiring simply amatter of changing the cross -connects.

We purchased a reel of 15 -pairshielded wire; each pair is en-closed in one of the new foilshields with a ground lead. Wehave run enough of the cable toeach room to allow not only for

our planned facilities, but also anumber of spares as well. High-level signals, for monitors andtalk -back, were run in one cablewith a tap brought up at eachroom on a separate area of thepyramid terminal ; i.e., the termi-nals at one end of the block aremedium -level terminals, the ter-minals at the other end are high-level cable taps.

Microphone and other low-levelcabling is run separately and di-rectly from termination to ter-mination - not via the shop -in order to keep cable routesshort. The duct is convenienthere, too; microphone connectorswere mounted right in the duct.

Inter -equipment audio wiringis only a part of the problem,however. Also to be kept in mindare requirements for telephoneand electric service. We were intouch with our telephone com-pany from the time our architectturned out the first prints. Suchnecessary items as conduit, tele-phone locations, cable terminallocations for remote lines, etc.,were all worked out in advance.The telephone company, cfcourse, required wall space in ourshop; by working together, wewere able to allocate sufficientspace for a more accessible, neat-er installation. We paid particu-lar attention to working out ameans for getting from theircable to ours.

The result of all this ductingand terminal provision is neat ap-pearance as well as electricalquality. Out of the duct at eachpiece of equipment comes a cableor conduit, within which are thenecessary pairs and spares to dothe job.

November, 1966 - BM/E31

Program Director Rod Baum at the production room console.Cartridge and mono and stereo reel-to-reel recording facilitiesare available.

View of wiring duct near master control consoledesk. Utility speakers are for mobile, EBS, andtalkback; 8" baffle mounted speaker is housemonitor (console monitor is theatre -type speaker).

View of the shop wiringpanel as it neared com-pletion. Each Jonesterminal strip feeds a

room monitor switchthrough a 6 -pair #18twisted cable. Pyramidterminal blocks providecontrol room intercon-nection through 15 -pairindividually sh,eldedcables. Cross -connect-ing wire is #18 solidtwisted pair.

Newsrcc-n has beeper phcne and cartridge tape recprdingfacilities.

Sales Manager William Kozel closes another one. Monitor panels inall offices (right, above desk) select 5 amplifier outputs: AM, FM, net,mobile receiver, and background music.

32November, 1966 - BM/ E

Five outside lines were in-stalled, 3 for normal use. The4th line is the "Beeline" and the5th is an unlisted "hotline" withreceivers in the newsroom andmaster control for use by staffmembers when on outsde duty.Studio and office facilities in-clude 17 Touch -Tone sets, twoin the control room and news-room. "Hands -free" phones (withmic and speaker) provide addedconvenience in the newsroomand manager's office. The othernewsroom set is a card -dialphone which automatically dialsoften -called numbers frompunched cards. Studio phoneshave no bells; they produce asoft metallic tone. In addition,22 program lines run into thecentral telephone hookup areused for transmitter programfeed and permanently -connectedremote locations.

AC power is necessary, ofcourse, and our electrical require-ments included several demands.Each room has a separate breakerfor lighting and a separatebreaker for receptacles; eachcontrol room is provided with a15 -amp breaker circuit branchfor console and audio facilities;on -air lights are mounted in code -approved boxes.

Traffic PatternsNaturally, one of the reasons

you want a new building is tocut down on wasted steps, andto make your operation easierto supervise and more productive.But remember, too, that somestaff members require specialworking conditions. Copywriters,for example, need quiet surround-ings, even though they some-times may confer with clients orprogrammers. Salesmen often areengaged in lengthy telephone con-versations or in meetings withcustomers. A manager requiresprivacy for personnel meetings,financial discussions, etc., yet hemust also be aware of his staff'sactivity.

Heating and CoolingThis is one area that deserves

extraordinary attention. You notonly have the problems of heat -generating electronic installa-tions, but you also have studiosin which there is no ventilationof any kind except that providedby air conditioning. Air condi-tioning can be noisy, and it canbe expensive.

In order to have fully air -con -

Publicity and Promotion

Open House Tour of station, bus tour of area, reception and cocktails, dinner for

20 out-of-town clients and reps on Thursday Sept. 22. Cost $9 per. Reception and cocktails at station for 220 local businessmen and

community leaders, Friday Sept. 23. Cost $2 per. Public open house at station with free soft drinks and hot dogs

attenced by 2300 guests. Cost $.20 per. AM -FM radio given away.

Newspaper Full page ad inviting public to open house. Half page ad promoting FM.

"Radio Plus" Program Promotion Releases to local papers tied in new program features with the in-

auguration of the new facilities, Mon. Sept. 26. Noon news extended to full hour. Additional features include:

Entertainment News (Jimmy Fidler), Remember When (Stu Wilson),Daily WOHI Salute, Kaleidoscope, Educational News Special (OhioEducational Ass'n).

Ellery Queen's Minute Mysteries at 6:15 AM and 4:15 PM. Believe It or Not at 8:55 AM and 5:25 PM. Kaleidoscope in noon news and at 6:45 PM. Morning show renamed Morning Open House, hosted by Joe Coons,

invites on -air visitors to express views on any subject and air petpeeves. Rules specify that no individual or firm name can be usedexcept in reference to an activity of public record.

Contemporary art displays in station will afford local artists and studentsan opportunity to show their work. Local art instructress will actas curator of exhibits including painting, sculpture, photography,and drawings.

WOHIWOHI-FM NOW:

RADIOPLUS

TOSERVE we overage arce. .1.ag W. tine. PI OW gwel. w we le

we Mew wIre lolowng 11.1 e luve We111.114 ,f I. le 1. 1011 [0.1.11.1111 1

TOTHIS END, 11111 02 our Aft,' ..... AAA *Rh 401

22421. awl staff kw ow II., 1.1 2.3N.. yen A. 11.111..11 a Ia. IX NIM.

WE INVITE YOU12 All 10 M. ad /120 art 20111. Wirm 011.1.2 ad MO On.

A. W.. prue. 114111N4 A. el ..«... N2 alt 1. hem I. J. 14.-1.a. P. NM. 0., .11....

A 231 ani 1100 512.3 02.111.. L.,. 1N. 21 I.e 1.842 kr.

WE'RE LOOKING FORWARD TOMEETING YOU!

WOHI "D WOHI-FMSEMIS, 11 HIE 17 YEARS 1

/ ',a I I ..y4A.. e Aadooty ot IA...... time?

Full page ad invitinglisteners to OpenHouse appeared Sept.22, in nearby "Wells-ville Press."

Half page ad pro-moting WOHI-FM ap-peared Sept. 26 inthe Lisbon "EveningJournal."


900PERFORMANCE IS MORE THIN SKIN DEEP

Behind the tape reels and the head covers of a Tape-Athon900 Recorder/Reproducer, are the electronics and mechanicsthat make the difference between the 900 and any otherprofessional recorder in the world. Its superior operationaldesign can be seen in all the features it offers:

Dual Capstans that provide instant starting and stopping. All solid state electronics for top reliability, compact pack-

aging and minimal heat generation. Controls that permit tape speed selection, reel size option,

an editing mode, and even remote control. Tape-Athon reel locks are positive acting, and like no other

we know of, removable with one hand. A "human engineered" design that elim-

inates control hunting, protruding switches,and operator fatigue.

The 900 Catalog shows all these features, andmore, in detail. Write for a copy.

Topt-Ailunt,

ditioned offices, yet maintainmaximum operational economy,we have two separate "zones" ofheating and cooling. The air con-ditioner for the studios, a gas -energized 3 -ton unit, is fully sep-arate from an identical machineused for the offices. It is our ex-pectation that the studios willneed little winter heat but muchsummer cooling, while the officeswill require more heat but havea shorter cooling system. We basethis thinking on a highly success-ful installation at our old prem-ises, where the units (now inplace at our new building) wereinstalled in 1964. The splittingof the system saved us about 30%on our annual cooling costs.

Inter -Room VisibilityDon't forget the value of op-

erational studio -to -studio visibili-ty. In our case, rooms are sep-arated by glass. We used doubleplate glass construction, with onepane canted slightly to cut re-flections. Bear in mind, too, theacoustic problems that your glasspartitions will cause. We sacri-ficed public visibility to get atleast some privacy for our an-nouncers and some acoustic quali-ty for the studios.

Financing and DesignWe erected a new building be-

cause we needed it. But as a sta-tion owner, I immediately real-ized the advantages - from astation point -of -view - of havingthe building constructed for usunder a lease arrangement. Therewould be little drain on stationcapital other than new equip-ment costs. After seeking localcapital to finance the project, Iwas able, personally, to providethe building, and in turn leaseit to the station. Shortly afterthe plan was announced in thepress, an official of an insurancecompany with offices in our cityapproached me, and with anotherlease in the bag, a second floorwas added to the plans. Thebuilding is financed by a mort-gage with a local Savings andLoan Company. About 30% wasrequired as cash in hand, withabout 70% of the cost coveredby the martgage.

Since I am a radio man, nota contractor, I decided at thestart that I would employ a goodarchitect and a good general con-tractor, and this has paid off.

523 South Hindry, Inglewood, California 90307Tel. (213) 678-5445 Continued on page 58

Circle 22 on Reader Ser.'ice Card34 November, 1966 - BM/E

For CATV . . . Superiorcoaxial cables are the best

Superior never compromises on qualitySuperior Coaxial Cable has earned respect for built-in reliability and

stable performance - proved in CATV applications which already totalmillions of feet.

Superior manufactures coaxial cable under specially devised systems ofquality control and sweep -tests every reel over its entire length prior toshipment.

There is no need to settle for less than the ability to make all frequenciesavailable to your customers. There is no reason to risk any attenuation dis-continuity - or any of the skipping and jumping frequencies often found inordinary cable. For long-term transmission stability, full spectrum capabilityand outside plant reliability - you can rely on every foot of Superior Cable.

75 ohm coaxialswith "Coppergard"

corrugated copper shield

Cell-O-Air.expanded polymhylenedielectric is for aerial installa-tions: "Solid -I3- solid natural poly-ethylene dielectric is for directburial installations. Guaranteedfive years.

J 75 ohm coaxialswith "Alumagard"

solid aluminum shield

Newest addition to the Superiorline - for aerial installation -Cell-O-Air'expanded polyethylenedielectric: extra high strength sol-id aluminum sheath. Guaranteedfive years.

Balloon coaxial cable, 75 ohm air dielectric, also available.

For detailed information and prices. write

SUPERIOR CABLESUPERIOR CABLE CORPORATION / HICKORY, NORTH CAROLINA 28601

10264

Circle 23 on Reader Service CardNovember, 1966 - BM/ E 35

XDR

TrunklineBridgerAmplifier

XDR

DistributionAmplifiers

Bridgeability is a new CATV distribution concept. Thetwo subsystem companions that make Bridgeabilitypossible are the XDR Trunkline Br dger Amplifier ancthe XDR Distribution Amplifier.

SIX XDR DISTRIBUTION AMPLIFIERS PER OUTPUT

XDR Bridgeability setsnew performance standardfor CATV distributionBridgeability-the number of subscribers that canbe served from a single trunk bridging location.

Anaconda Astrodata introduces the concept ofBridgeability with the XDR (extended dynamic range)Amplifier line. The XDR 'Runk Bridger, togetherwith its subsystem companions, XDR DistributionAmplifiers, can serve up to 1104 subscribers from a singletrunk location.

This new dimension of CATV performance is achievedonly with the XDR Bridger Amplifier operatingat a high output level feeding longer cascades of XDRDistribution Amplifiers - up to six DistributionAmplifiers may be cascaded from each of the fourBridger Amplifier outputs. A single Bridger Amplifieroutput will serve 36 subscribers and six DistributionAmplifiers, each with a capability of 40 subscribers.Hence, 276 subscribers for each of four outputs,or 1104 total for each XDR Bridger Amplifier.

Even when maximum distribution cascading is notrequired, the new dimension of Bridgeability providesa high-level distribution system with improvedpicture quality, and makes it technically feasible toinstall high quality systems in large communities, orfinancially feasible to install profitable systemsin smaller communities.

For additional information on the Bridgeabilityconcept offered by the advanced XDR equipment,contact your Anaconda Astrodata representative.

ANACONDAastrodata

ANACONDA ASTRODATA CO.1430 SOUTH ANAHEIM BOULEVARDANAHEIM, CALIF. 92803 (714) 635-0150

Anaconda Astrodata Total Systems:

RESEARCH & DEVELOPMENT I SYSTEM DESIGN / ELECTRONIC EQUIPMENT / CONSTRUCTION / CATV TEST EQUIPMENT TECHNICAL & FINANCIAL ANALYSIS / FINANCING


November, 1966- BM/ E 37

Planning A New CATV System

So YOU have a CATV franchise!Now you must fulfill its

terms by building and operatingthe system. If you think the fran-chise acquisition was rough, youain't seen nothin' yet! As anybuilder -operator can tell you,CATV system construction pre-sents a unique challenge thatwill test all the patience, skill,and knowledge you can muster.

Generally there are three waysto put a new CATV system intooperation: (1) build it yourself,(2) sign a turn -key contract, or(3) sign a long-term lease -backagreement with the telephonecompany. Let's consider some ofthe advantages and disadvantagesof each approach.

Building Your OwnBuild -it -yourself system con-

struction requires that either you

Mr. Cooper is pres. of Valley Vi-sion, Inc., Modesto, Cal., and au-thor of the book, "CATV Man-agement and Operation."

By Robert B. Cooper, Jr

The new CATV franchise holder has many things to consider.Here are the various construction routes open to him.

have sufficient know-how and ex-perience or that you hire some-one who does. Either way, if theresponsibility for getting it builtis yours alone, here are the gen-eral areas in which you will beinvolved :I. Negotiations with the tele-phone company.2. Obtaining local permits.3. Obtaining federal permits.4. Planning system layout.5. Selecting and buying equip-ment.6. Hiring construction people.7. Buying or leasing heavy-dutyconstruction equipment.Each of these decision -makingareas offers special problems, solet's look at them one by one.Telephone Company

Assuming you are going to usetelephone company poles, you willneed to arrange a joint -pole agree-ment. If you are very, very for-tunate, only 90 days will elapsefrom the day you make formalapplication until you have youragreement in hand and can begin

Chevy Van used by Clearview of Florida is outfitted withinstaller interiors from Nolan.

to use the poles. This is assum-ing, of course, that the poles areessentially ready to use "as is,"requiring little or no existingplant rearrangement.

Along with the joint -pole agree-ment, you must line up insuranceand bonding satisfactory to thetelephone company, hold severalmeetings with the telephone com-pany plant engineer to determinewhat pole rearrangements will berequired, and constantly sit on thetelephone company doorstep to in-sure that your application doesnot get bogged down with "in -and -out basket fatigue." Plan onspending at least one full day perweek on this phase of the projectfor every week the application isbeing processed. On the otherhand, if you don't mind a 6- to 9 -month wait, just leave the appli-cation alone and eventually it willthread its way through telephonecompany red tape.

Local PermitsYour CATV franchise is a per-

mit to build and operate a CATV

Earth -boring equipment and air hammer, powered bymobile generator, are often required when setting yourown poles.


system. It is not a constructionpermit for your head -end build-ing and tower; it is not (prob-ably) a permit to do business inthe city; it is not a zoning vari-ance to allow you to install atower or towers and head -endbuilding in an area zoned R1; itis not a permit to dynamite orblast stubborn rock for a towerfoundation; it is not an agree-ment with the local electric com-pany to supply power to yourhead -end site; it is not a permitto build a head end in the countyto serve the city; and it is not apermit to run cables from yourhead end to the city through thecounty. In other words, plan onand expect to be "permitted todeath." The more of this you getout of the way before you beginconstruction, the fewer delaysyou'll have when work begins. Inmany cases, the permits are amatter of formality.

If your projected head -end siteis in an area where zoning pro-hibits such an installation, youwill have to appear before theplanning commission and seektheir approval. Assuming you runinto no opposition from nearbyland owners, this process will takethe statutory notice and hearingperiod, usually 30 days.

If you do run into opposition,you can appeal your case to thecity council which granted you theinitial franchise. If the city coun-cil also turns you down (in truth,you are asking for a spot zoningchange, which is difficult at best),be prepared to start looking foranother head -end site. At thispoint, probably at least 60 dayshas elapsed, and if you start from

Looking AheadWhat about local origination? NCTA says "go ahead-as fast as possible-with local public service programming." NAB cautions you not to,and the FCC has asked for authority to restrict or completely cut offlocal programming.

What constitutes local programming? Is a time -weather -news servicelocal programming? What about those systems which televise local citycouncil meetings, and other public affairs programs?

If your town can be reasonably expected to deliver 1,000 or moresubscribers at the end of three years, with a potential of another 1,000or more, you had better give serious consideration to local programorigination.

If you originate downtown, programming must be relayed to the headend. There are three feasible methods of accomplishing this. Simplytape everything, and haul the tape to the head end. As useful as avideo tape machine might be, this is no way to tie it up.

Another method is to use microwave. A single -channel link mightmake real sense if the head end is some miles distant.

A third way is a return -loop of coax cable, sort of a reverse trunk.If this done on a subchannel, you may get by without any-or just afew-repeater amplifiers. If you think you might have need for it, planahead and lash -in a spare cable between the head end and the officewhen the system is first installed. Then it will be there when you needit. In most cases, your initial cost will be only the additional cable.

the beginning one more time, youcan count on the mandatory 30days, anyhow-a total of 90 days.

If your installation includes atower of any size (over 170 feetif 3 miles or more from an air-port, under 170 if closer to acommercial airfield), you mustalso make application for FederalAviation Agency approval. This isa 30 -day process at best. TheFAA may impose a number oftower lighting and painting re-quirements. Or, they may tell youthat it's okay to put up a tower,but that it cannot exceed a certainheight, which may be only halfof what you feel is required. This

Telsta Corp. manufactures this combination electric lift andTel-Lasher cable and strand stringing outfit.

may force you to give up theprojected site even before you be-gin because there is no appeal ofFAA rulings.

If your site is somewhat re-moved from regular serviceroutes, the power company maybalk at providing service. Operat-ing as they do under state publicutility commission rules, there arecertain things you can make themdo. But you may find the cost ishigher than if you did it your-self Charges of $1.65 per foot forextended service in remote areasare not unusual; and, at a costof $1,650 per 1,000 feet, youshould be able to do it yourself

For construction of underground plants, equipmentsuch as the "Ditch Witch" trencher is needed.


Aerial Lift & TrenchingBaker Equipment Eng'g Co.Summit Ave. & Norfolk St.Richmond, Va.

Garnett Co.Denver, Colo.

Halline Utility Equipment5525 S.E. 28th Ave.Portland, Ore. 97202

Nolan Div-Ohio Brass4100 W. 150th St.Cleveland, 0. 44135

Hunt -Pierce Corp.230 Old Gate LaneMilford, Conn.

McCabe Powers Body8900 Frost Ave.St. Louis, Mo. 63134

Charles Machine Works1532 B StreetPerry, Okla. 73077

Equipment ManufacturersStahl Metal Products, Inc.4570 W. 160th St.Cleveland, 0. 44135

Pitman Mfg. Co.Grandview, Mo.

Wyoming Valley Eqmt. Div.714 Wyoming Ave.Kingston, Pa.

Co. Tele-E-Lect, Inc.9135 Grand Ave. SouthMinneapolis, Minn. 55420

Telsta Corp.1700 Industrial Rd.San Carlos, Cal.

Co. Utility Body Co.901 Gilman St.Berkeley, Cal.

Davis Mfg. Co.1514 S. McLean Blvd.Wichita, Kan. 67213

The Basic CATV Plant

While there is probably no such thing as a "typical" CATV plantlayout, shown here for illustrative purposes is the trunk line (heavysolid line) leading from the antenna site (at left) to the right througha chain of trunk line amplifiers. At points A, B, C and D bridgingamplifiers (trunk to distribution service) are installed. The dashedlines represent distribution (customer service) lines, four from eachbridging amplifier. For sake of clarity, line extender (distribution)amplifiers are shown on only one output leg of bridging amplifier A.

ANTENNASITE

/-- UP TO 4400'- - -

-- UP TO 4400'---,AGC

TRUNK LINE

---- UP TO 4400.-1

- UP TO 4400'---AGC

UP TO UP T04400'44p0' ce-__ -UP TO 4400.-4

r --UP TO 4400'AGC

MOa 7"..: 0 2.711

UP TO4400'

DISTRIBUTION r-1

LINES

1

SYMEOLS USED

113j TRUNK AMPLIFIER

cm, TRUNK TO DISTRIBUTIONBRIDGING AMPLIFIER

19 LINE EXTENDER (DISTRIBUTION)AMPLIFIER

TERMINATION -END OF LINE

U.P TO4400'

UP TO4406 "'^'

El 2 -WAY SPLITTER

- TRUNK CABLE----DISTRIBUTION CABLE

r - UP TO 4400'

TO 44001

--UP T04400'--$

UP TO4400'

While distribution lines "up to 4400" are shown here, the lengthof individual distribution (customer service) lines will depend on typeof amplifiers employed, type of cable employed, number of subscribersalong the line(s), or density, and the number of splits in the distribu-tion legs. Conversely, distances between trunk line amplifiers will de-pend upon type of cable and amplifiers employed. No AC power cir-cuitry is shown, for simplicity. Assume the amplifiers are cable -powered.

Local SuppliersChances are you will be pur-

chasing many small items locally.This might include hand tools,electrical wiring supplies, cement,building materials, specialty pow-er and other machinery rentals-the list is endless. Before youbegin construction, make a list ofevery step and the tools and sup-plies required. Set up credit ar-rangements with the necessarysuppliers, unless you want to fol-low your construction peoplearound all day paying cash for100 screw -eye hooks, $5 a -day ACgenerator rentals, etc. This listwill help insure that everythingyou need is locally available. If itis not, better find out what isneeded and where you have to goto get it, or construction can cometo a grinding halt for hours, or aday or more, at a crucial stage.The Construction Crew

There is a considerable shortageof trained, skilled crews in thisindustry. This may be a part ofthe reason that so many new sys-tems are being turn -key con-structed. First and most obviousis that somebody has to knowwhat is to be done and how itis to be done. If you are not thatperson, with actual experience,you must find someone who qual-ifies. Make him the foreman,general manager, or somethingsimilar, and lean on him for ad-vice right down the line. He prob-ably will not be knowledgeable inall areas; he doesn't need to be.If he knows construction tech-niques thoroughly, let that beenough.

If you personally plan on doing8 hours of physical work a day(supervisory and otherwise) andhave decided that one crew andconstruction -type truck is ade-quate, a working foreman andtwo line construction men shouldbe enough. If, on the other hand,you do not plan on getting intothe fray yourself, you will alsoneed a good journeyman techni-cian to help out with the equip-ment installation, building thehead end, towers, and so on. Thisbrings us down to one knowledge-able foreman, one good technician,plus the two line constructionhelpers, for a company that plansto wire and build 3 miles of plantper week. A foreman will probablybe found working as an assistantforeman with some other cablecompany; a technician will prob-ably be working for one of the


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11NUCLEAR CORP

. . . nor a red one either, because there's no need to worryabout your color signal when you use our TSAI. Clamping/Equalizing Video Amplifier. Tip clamping dces it. No dis-turbance of color burst or other chrominance information inor about blanking or back porch levels. Gain ... continuouslyadjustable from zero output to 6 db with no bounce. 28 dbgain also available. Sync stretching or compressing. Whitestretching and clipping. All solid state. Fits standard rack.Heck man, don't take our word for it . . . TAKE 30 DAYS ANDTRY IT OUT . . . AT OUR EXPENSE!

PRICE: $850.00 EACH, F.O.B. NASHVILLE, TENN.

28 db gain $75.00 additional, designated TSA1HG

We invite your inquiry . . . please write:

INTERNATIONAL NUCLEAR CORPORATION"Transistorizing the Television Industry"608 NORRIS AVENUE NASHVILLE, TENN. PHONE 615-254.3365

November, 1966 - BM/ECircle 25 on Reader Service Cord

for 1/ 4th the cost by setting yourown poles and stringing your ownAC service lines.

If you set your own poles, careshould be taken to leave sufficientroom to bring your trunk cableout of the head end on the samepoles. If the power utility sets thepoles, have them reach a joint -use agreement with the telephoneutility so you can use the polesunder your joint -pole agreementto bring your trunk out. This mayshave the cost considerably, par-ticularly if the local telephonecompany engineer feels generousand agrees to pick up his 50-60%of the cost of the poles.

If you are going to cross countyproperty with your trunk, you willneed to approach county officialsfor permission to do so. In someinstances this is a simple process.The county building permit officeissues the permit, and the countyroad department issues permis-sion to string cable along countyrights -of -way. In other counties,especially in a county with alarge unincorporated suburbanpopulation, the process may getmore involved, approximatingthe same bureaucratic red tapeyou can expect to find in a city.The best advice is to tackle theproblems head-on as early aspossible.

System LayoutVery early in the game-prob-

ably before the franchise is let-you have secured the assistance ofan individual knowledgeable inCATV system design and haveprepared a system -layout map ofthe town or city. From this layoutyou have a pretty accurate idea ofhow many miles of trunk and dis-tribution cable will be required,how many amplifiers will beneeded, the number and locationof AC power supplies, and thechannels you will supply. To ob-tain this information you need anaccurate and detailed map of thecity (to a known scale), a studyof the telephone plant pole routes(by car and on foot), and anaccurate long-term head -end sitesignal survey.

Equipment SuppliersJust let a few equipment sup-

pliers know you are going to pur-chase equipment and sales en-gineers will come flocking to yourdoor. Each will point out the vir-tues of his equipment, quote de-livery dates and prices, and leaveyou to sift through a large ream

Costs Per MileA mile of trunk? A mile of distribution? Or, a mile of trunk and dis-tribution? The variables are endless, so for purposes of discussion let's

consider a mile of distribution caole. We have the following costs to

consider:Pole re -arrangements can run the gamut, from no cost to several

hundred dollars per pole. $15 per pole would be a high -average. At 40

poles per mile, you would have $600 invested. Pole -line hardware, including messenger, lashing wire, clamps, and

an occasional guy, will run $350 oer mile. Coaxial cable and amplifiers. If you are using .412 for distribution,you will have $100 per 1,000 feet invested-$528 per mile.

In a straight -street mile, with 500 -foot blocks, there are 10 cornersin a mile. That's 10 splitters for 2 -way feeds at each corner, an averageconnector investment of $200. A 40 db bridging (distribution) amplifierdriving 36 db line extension amplifiers will get you through a mile of.412 distribution cable with medium loading. You will use only oneof the four bridging amplifier parts. So you have Bath the cost of that

unit; call it $100. In 5 line extenders, at $60 each, you have $300 in-

vested. These 5 line extenders plus the single port of the bridgingamplifier will require around 1.5 amps out of a $200 12 -amp supply.

So total cost for RF and AC for that mile is $450.Labor: If your crew of foreman and two helpers can install a mile of

plant in 12 working hours, you have a direct labor expense of around

$140.Operating overhead will vary considerably, as a direct inverted re-

lationship to the size of the system. $250 per mile is not unusual.If you have been following this through with a columnar pad, you

know by now that the total investment in this mythical mile of dis-tribution plant is $2,518. The figure is way low, you say? Maybe so,

but many operators are doing it for this, although individual categorytotals may vary

of promotional literature. If youhave a system engineering lay-out, let each supplier with whomyou may deal prepare an equip-ment bid. This will include awiring diagram, a breakdown ofthe equipment required, and atotal price.

If you are dealing with com-panies specializing in only dis-tribution equipment, you will needto begin soliciting informationand bids on antennas, towerstructures, and cable and pole linehardware from separate firms.Antennas are selected on ratedperformance; tower (s) are pur-chased first by specifications, sec-ond by price. On a competitivebid basis, some firms will quotedelivery for as much as 40% lessthan others. Assuming the bid in-cludes installation, a local firmmay save you money on deliverycosts. Others may already have aninstallation crew in the area withslack time in their schedule,thereby enabling them to offeryou a bargain. There are a multi-tude of items affecting towerprices, and if you request bidsfrom reputable firms, based onstandard EIA tower specifica-tions, you should be safe with the

lowest price.Coaxial cable prices, because of

the highly unstable copper market,keep going up. As soon as youaccurately determine the typesand quantity required, go aheadand issue a purchase order guar-anteeing you delivery at the cur-rent price, even if you don't ex-pect to take delivery for 6

months or more. Cable specifica-tions vary from one company toanother, but there are a numberof cable companies with consid-erable CATV experience. Aslong as you stick to one of these,you should have no problems.

So far, pole -line hardware hasnot been in short supply. Sup-pliers such as Jack Pruzan havemany years of CATV experience,and even though you may notinitially understand all of the fineprint in telephone company spec-ifications, you can ask for andexpect help from such knowledge-able suppliers. Most pole -linehardware companies can supply95% of what you will need fromstock on same -day shipments. Sothere's no particular reason to getstarted real early here, other thanto get acquainted with the sup-plier.

42 November, 1966 -BM/E

Announcing...for color andblack and white,the new family ofRCA image orthiconswith a biq difference herethat shows up biq hereNow RCA brings you the "BIALKALIPHOTOCATHODE" in the new RCA -8673 and-8674 Image Orthicons. This major engineeringinnovation has greatly improved compatibilitywith its non-stick target, maintaining resolutionand sensitivity over an extended tube lifetime andimproving performance of existing color orblack -and -white cameras. A simple change in aresistor chain provides proper voltages for a trio ofthese new Bialkali Photocathode Tubes. Wide-range,the 8673 and 8674 fit spectral requirements of allthree channels ... eliminating the need for anothertube type for the blue channel.Another big difference: the re -designed image sectionprovides reduced distortion and freedom from "ghosts."These new tubes are available singly or as matchedsets-a trio of 8673/S or 8674/S types for color service...types 8673 and 8674 for black and white. Mainconstruction difference is in the target -to -mesh spacing.The closer -spaced 8673 enhances S/N ratio for qualityperformance under sufficient illumination. The 8674has greater sensitivity under limited illumination. Forcomplete information about the new RCA BialkaliPhotocathode Image Orthicons, ask your RCABroadcast Tube Distributor.

RCA Electronic Components and Devices, Harrison, N.J.

The Most Trusted Name in Electronics

USE THIS CHART TO SELECT REPLACEMENT

TYPES FOR THE TUBES YOU ARE NOW USING

UNDER SUFFICIENT LIGHTING LEVELS

For color pick-up,If you're now using ... You can replace with:

4513/S8673/S7513/S

For black & white pick-up,If you're now using ... You can replace with:

451375137513/L 86738093A8093A/L

UNDER LIMITED LIGHTING LEVELS

For color pick-up,If you're now using ... You can replace with:

4415S8674S4416S

For black & white pick-up,If you're now using ... You can replace with:

7293A86747293A/L

AVAILABLE FROM YOUR RCABROADCAST TUBE DISTRIBUTOR

Circl. 26 on Reader Service Card

Fast, easyheal replacement forcatrri'dge machines!

Through a unique system of Nortronics Quik-Kits and No -Mount Heads,rapid, economical replacement or NAB conversion is possible on more than55 different cartridge machines!You can replace worn rear -mount heads with high quality Nortronics no -mountheads-in minutes! Quik-Kits are pre -assembled and semi -aligned ... fully ad-justable for height, azimuth and face alignment. All heads are ProfessionalType, laminated core with hyperbolic contour and all -metal faces.

for full details -see your Authorized Nortronics Distributor,

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Excellent cistortion anI frequency response cheracteristic3

Automatic electronic rr ut ng with adjustable de ay

P-ak readirg deviat al meter calibrated in KHz

New highly stabilized oscillator

C-zld plated, etched cDpper, plug-in circuit :Drds

MODEL SC3-4T

Sand For Bulletin _7316

MOSELEY ASSOCIATES, INC.

135 Nogal Drive, Santa Barbarc, Cali'orria 93105Telerhzne (805) 967-0424

are all essential items for anyconstruction job.

Turn -Key ConstructionA turn -key job is simply this:

somebody else builds the entiresystem for you, but you must ob-tain all necessary city, county, andfederal permits. You will have tomake at least a preliminary sur-vey for the head end and a streetlayout for cable routings. Andyou will have to obtain the poleagreement. But once you have allof the necessary approvals, youcan turn the entire bundle overto the turn -key builder. He maybe an equipment supplier, or anindependent contractor who spec-ializes only in construction.

You may still need a number ofpeople working for you and havethe necessary truck equipment tomake the initial drops, and con-tinue with drops and equipmentmaintenance after the system'sinitial opening.

Telephone CompanyLease Back

Although this method of systemconstruction is relatively new, ithas caught on in many areas ofthe country. Basically, you signan agreement with the telephonecompany. You agree to build thehead end; they agree to build thetrunk and customer distributionplant and lease it back to you.

The terms of such an agree-ment vary from one telco toanother, but basically they are allthe same. You agree to a 10 -yearlease, at so much per quarter -mileof plant per month, plus so muchper active drop per month.

Necessary permits are, for themost part, still yours to acquire,except the joint -pole agreement.The telephone crew will maintainthe RF amplifiers throughout thesystem, you will run the drops (inmost cases). Of course you do notown the plant-you simply leaseit.

ConclusionThe cable operator who care-

fully plans his expenditures, hisconstruction program, and hisafter -construction operating tech-niques will come much closer tohaving his plant paid for in 36 to48 months after initial operationthan his less careful contem-parary. Decisions made early inthe system's life will stay with itfor many, many years. Make surethey are the right ones!

Circle 27 on Reader Service Card44 November, 1966- BM/E

Measure; INSERTION LOSS

Measure; INSERTION GAIN

Measures RETURN LOSS

Measures CAE LE IMPEDANCE

All Solid State --;5 chms-Portable

Simplified Measurements

Utilizes Swee3 Corrparison Technique

Full VHF Bandwidth

Large Ec eer

Variable Swea3 Fate

Crystal Contr,led Markers

rEATURES

OPT'ONS

Electroric Co3.cia Switch

X -Y Recorder

Calibratec Va-' ab e Marker

Additiora Markers

Power Convertor for 7ield Use

First Complete CATV System AnalyzerElectronic System Analyzer Model 990"

Anaconda Astrodata's completeCATV System Analyzer, the first ofits kind, permits sweep measurementof system parameters with a highdegree of accuracy. By combiningall required sweep set-up instrumentsinto a solid state 75 ohm portabletesting facility, the System Analyzereliminates errors caused by the use ofexternal jumper cables and impedancematching devices. Measurementsare made simultaneously by usingsweep comparison techniques.

A variable RF bridge permits cablereturn loss caused by structuraldiscontinuities to be measureddirectly by the analyzer against theaverage cable impedance.

By incorporating marked advances insweep frequency generator technologyin an accurate portable testingfacility, Anaconda Astrodata againdemonstrates why it is the symbolof progress in the CATV industry.Send for details of our advancedtest equipment for the finestin CATV. *Patent Applied For

Anaconda Astrodata Total Systems

RESEARCH & DEVELOPMENT-SYSTEM DESIGN -ELECTRONIC

ANACONDAastrodata

ANACONDA ASTRODATA CO.1430 SOUTH ANAHEIM BLVD.ANAHEIM, CALIFORNIA 92803

EQUIPMENT- CONSTRUCTION CATV TEST EQUIPMENT -TECHNICAL & FINANCIAL ANALYSIS -FINANCING

November, 3966- BA/ECircle 29 on Reader Service Carl

45

provides the capabilityto remotely monitor

AM directionalarrays having up

to 9 towers

Model 112Phase Monitor

Model 113Remote Meter Panel

The Model 112 Phase Monitor is an advanced, all -solid-state unit whichprovides phase and current measurements of AM directional arrayshaving up to 9 towers. Easy -to -read panels provide phase readout of± 1 degree accuracy with 0.5 degree resolution, and loop currentreadout with .5% repeatable accuracy. Automatic Day -Night switchingof reference levels is also available. Phase angle and loop currentoutputs are provided for direct readout on a chart recorder or digitalvoltmeter, or can be fed over land lines for direct studio readout onthe Nems-Clarke Model 113 Remote Meter Panel. The optional Model113 unit contains duplicate phase and current meters.

The Model 112 Phase Monitor is very simple to operate; easy to read;and incorporates all circuitry necessary to permit future adaptation toremote control. Silicon transistors are used throughout for high reli-ability, long life and excellent temperature stability. Panel meters areof the taut -band type to eliminate pointer binding, and have mirrorscales to improve reading accuracy. v.:s

For further information, write or call:

1117-17 -IFELECTRON/CSProducers of NEMS-CLARKE Equipment

A Division of Vitro Corporation of America919 Jesup -Blair Drive Silver Spring, Maryland (301) 585-1000


larger multiple system operators,buried somewhere down theladder of seniority.

The Construction EquipmentMuch will depend here on how

large the system is, and how fastyou plan to build it. Turn -key sys-tem contractors work on the basisof so much per mile of plant.Frequently kicked around in theindustry is a magical "$4,000 permile" figure. Frequently, hiddenbelow the bold print, are notesthat this figure is exclusive oftower and head -end equipmentcosts. Yet, it is possible to builda 12 -channel system, for $4,000per mile, including head -end costs.Obviously, if the head end costsyou $10,000 and the plant is 10miles long, the system is going tocost $1,000 per mile for head -endequipment, leaving you $3,000 permile for the actual plant. If thesame plant is 20 miles long, thecost -per -mile for the head end ishalved to $500 per mile, leaving$3,500 per mile for plant construc-tion. So actually, general figuresof $4,000 per mile are not toomeaningful unless you know thecriteria under which they havebeen established.

The largest, most expensivesingle item to be considered isthe construction truck. Should youhave one? More than one? Themost versatile truck is a hy-draulic -operated boom truck withbucket. Mounted on a 11/2 -tonbody with 8 -cylinder engine, all-around tool cabinets and an ACgenerator to operate drills andpower equipment on the road, theunit will weigh nearly 5 tons andcost around $10,000. For a 10 -mile plant, cost of such a truck is$1,000 per mile. A suitable one -ton truck with a hand -operatedextension ladder mounted on aswivel, including a small bucket -type working platform, will costunder $5,000.

The best and most logical ap-proach to the decision is simplythis : How much will the truckcost per mile? Can you dispose ofit after construction and recoupsome of the expense? Or, is thesystem going to be large enoughthat you can afford to write itoff on a 5 -year depreciationschedule and utilize the vehiclefor routine maintenance, futureline extensions, hookups, etc.?

Other construction equipment ismuch less costly, and the deci-sions are easier to make. Thelashing machine, cable suspensionhooks, D blocks, and come-alongs


proof"

rms.4

# kVrTt

0 % '

.... : c

You can't make a mistake with a system that doesn't make mistakes. Schafer AutomatedSystems for radio stations are not only goof -proof in terms of reliability and workmanship,but also reduce the chance of human errors because they are so easy to operate and maintain.Schafer systems are designed to simplify your operation, retain your station's personality andkeep it running smoothly 24 hours a day. For a goof -proof operation look to Schafer.

schaferSchafer Electronics 9119 De Soto Avenue Chatsworth, California 91311 Telephone (213) 882-2000

Circle 31 on Reader Service CardNovember, 1966 - BM/E

47

proiessioni

soim gam

recorders -reproducers

loggers

Heavy Duty, Two -Direction Transport

with latest solid state electronics --provides exceptional Performance and

Reliability.Slow Speed Loggers capable of 12-16

operating days of continuous, unattend-ed logging time for any Broadcast orCommunications requirement.All equipment attractively priced; ex-

ceeds all N.A.B. specifications.Write today for six -page brochure andprice information.

metrotech

METHUEN, INC.670 NATIONAL AVENUEMOUNTAIN VIEW, CALIF.

BROADCAST

EQUIPMENTMic MixerShure Bros., Evanston, Ill. hasannounced a solid-state micro-phone mixer with 4 dynamic orribbon mic inputs with separatelevel controls; each input isequipped with a high or low im-

r=117114104Cpedance switch. One high levelinput for tape recorder or tuneris provided. The M68 has twooutputs-a high or low impedancefor PA mic input, and a highlevel (.5 to 2v) high impedancefor tape recorder or amplifier.Optional equipment includes abattery power supply, a multiplemixer stacking kit and rack panelkit. Price is $125.Circle 65 on Reader Service Card

Stud FaderA flat front - studfader designed forconsole mountinghas been intro-duced by Painton,Inc., Pleasantville,N.Y. The FM -1 oc-cupies 3/4" panelwidth and extends25/8" below panel,600 -ohm unbal-anced bridge -Tnetworks with 30 -step attenua-tion (plus off) are available. Cuelighting and micro switches arebuilt-in. Connections are made byrear plug and socket arrange-ment. List price is $75.Circle 58 on Reader Service Card

TV MonitorPye TVT Ltd., Cambridge, Eng-land, is offering a 17" solid-statestudio monitor available with405. 525 or 625 line scan rate;the scan system is selectable bya local or remote switch on themulti -standard version. Two 75 -ohm bridged or terminated videoinputs, selectable by a local orremote switch, and a separate75 -ohm bridged or terminatedsync input are provided. Videoinputs will accept a 0-25v (1-4vpeak - to - peak) composite signal

or a 0-2v (1v peak -to -peak) videoand blanking signals. All wiringis on hingeout printed- circuitboards. Brightness and contrastcontrols may be remotely oper-ted. The Type 2845 monitor op-erates on 100-125v or 200-250vAC at 47-70 cps.Circle 87 on Reader Service Card

Portable VTRAmpex Corp., Redwood City, Cal.is marketing the VR-6000 video-tape recorder and companion

closed - circuit vidicon camera.Using 1" tape, the VTR operatesat 9.6 ips and may be modifiedlater for color. Video response is30 cps to 2.5 mc; horizontal reso-lution is 250 lines; audio responseis ±4 db from 90 cps to 9 kc.Camera features optical view-finder, mic plug-in jack foraudio -video production, and VTRremote control switch. Luggagemodel VR-6000 is priced at $1,-450; camera is $549. 147 Seriestape cost is $59.95 for 60 -min.reel.Circle 59 on Reader Service Card

Solderless Terminal BlockA terminating blockcapable of accommo-dating 1,000 connec-tions has been devel-oped by Thomas &Betts Co., Elizabeth,N.J. The Connecto-Blok 500 is 151/8"between mountingholes, stands less than 41/2" high,and has male tabs for snap -onsolderless terminals spaced 5/16"apart. Tabs are set in 141/2" glasslaminate epoxy base. 13/32" holesact as fanning strips for wires;

Circle 32 on Reader Service Card48 November, 1966 - BM/ E

WHAT ARE THE FACTS ABOUTUHF KLYSTRON TRANSMITTER

COOLING SYSTEMS?

lystrons provide the best means of gen-erating large amounts of energy in the

UHF -TV band, but in so doing they pro-duce substantial amounts of heat whichmust be dissipated.

Faced with this problem, TownsendAssociates engineers have conducted com-prehensive tests comparing vapor phasecooling with straight water cooling. Con-clusions drawn from these tests indicatethat vapor is more critical than water inthree ways:

1. Klystron collector design must beprecise to prevent vapor blanketing andconsequent collector destruction.2. The water replenishing system mustbe carefully designed and maintained toprevent damage resulting either fromturbulence or loss of water.3. System cleanliness must be care-fully maintained to prevent film deposi-tion on the collector which could causea tube failure.In contrast, the superiority of water

cooling is demonstrated by:1. The design is conventional - timetried-and requires no special considera-tions other than adequate water flow.2. Cleanliness poses no problem-thesame water may be used continually withno maintenance.

MANUFACTURINGENGINEERS

FOR KLYSTRONTRANSMISSION

SYSTEMS

3. Lower temperature is involved: 120'for water as opposed to 212" for vapor.This lower operating temperature is im-portant for both equipment and operat-ing personnel safety.Having chosen water cooling with Eimac

klystrons, Townsend Associates engineersdesigned a foolproof water flow systemfree from the shortcomings of others. Watermetering devices and control valves aremounted on a subpanel behind one of thefront doors of the Townsend Associatestransmitter. This gives easy access to thewater flow control system while the equip-ment is in operation, without exposure tohigh voltages.

Moreover, the cooling system layout issuch that should a leak ever develop, itwould never disable any of the electricalequipment.

Further, dual heat exchangers are em-ployed to assure maximum reliability. Large,accurate temperature and flow gauges withreliable interlocks provide both readingease and a maximum degree of protection.

Cooling system design is important.Townsend Associates engineers have de-signed the only truly modern cooling sys-tem.

For More Information Write or Call:

TOWNSEND ASSOCIATES INC.BOX 215, FEEDING HILLS, MASS. 01030

AREA CODE 413-733-2284


DOay Of ...CO

SCA SOLID STATE RECEIVER

Dayton Electronic Products Company 117 E. Helena St. Dayton, Ohio 45404 513/461-4951Circle 34 on Reader Service Card

VHF TRANSISTORIZED

TRANSLATOR

ONE WATT OUTPUT

F.C.C. TYPE ACCEPTED

Also available10 WATT OUTPUT (VHF)

TRANSISTORIZED TRANSLATOR

and

MULTIPLE OUTPUT AMPLIFIERS

I RODELCO

127 Ridge RoadWyandanch, New York 11798

Phone -516 643.5110

Give your tapes andmats a clean start!

New AE -100 Automatic Degausser erases12" or less tape reel or up to 100 CUE -MAT* mats in 50 seconds.The AE -100 is motor driven and com-pletely automatic. It provides uniform,complete erasure for 1/4" tapes and matswithout the guesswork of other degaus-sers. Shuts itself off automatically. Loadit. Start it. Forget it.What's more, the AE -100 is compact, light-weight, and practically priced. Ask yourdistributor or write Ampex Corporation,401 Broadway, Redwood City, Calif. 94063.

*TM -Ampex Corporation

rAIMPEX

mounting plates may be rotated45° in either direction. Male -to -wire wrap tabs or gold platedtabs are available for critical lowvoltage applications.Circle 61 on Reader Service Card

Non-Dup SwitcherJerrold Electronics Corp., Phila-delphia, Pa. has introduced anon - duplication switcher de-signed to permit pre-set pro-gramming of 6 different outputevents occuring at any half houror hour interval during a 1 -week

7.7.7.7.7:4 %W.

period. The switching sequence isrepeated each week untilchanged. Program output is de-termined by location of pins;pilot lamps provide check of pro-gram output status for any giventime. The basic Model PC -6 pro-vides +24v DC for video or RFswitching by external relay ac-tivation. Internal relay contactsswitch B+ to either of two am-plifiers. Price is $2175. ModelIFS I.F. switcher is $495.Circle 63 on Reader Service Card

CATV TapA multiple outlet backimatchedtransformer which makes possi-ble as many as 4 outlets from asingle existing block without cut-

ting the transmission cable isavailable from CAS Manufactur-ing Co., Dallas, Tex. The "Milk -cow" is a direct screw -in replace-ment for :S" isolation units onall standard pressure tap blocks

50

Circle 35 on Reader Service Card Circle 36 on Reader Service CardNovember, 1966 - BM/ E

Will success spoil 75A?Never.75A is our rugged, reliable, long -haul, heavy density micro-

wave radio. And, although it's our newest system, 75A hasalready made its mark. For instance, the 75A heterodyne sys-tem is used in a heavy -density toll network in the province ofAlberta, Canada. (Proving yourself there, home of some of themost stringent operating conditions on the continent, is hardlya cinch.)

75A has also been used in the AUTOVON system, for amajor educational TV system in the mid -west, and for a long -haul telephone network on the West Coast. It has been selectedfor use with a COMSAT system and for CATV networks inNew York and Pennsylvania.

Do we sound like we're bragging a little? Well, we are. But,why not? The 75A has quickly proved itself as the perfectradio for backbone applications. It offers many outstandingfeatures including extremely low distortion. 5 watt output

power, and frequency diversity operation or one -for -threepath protection.

Also available are a program channel for TV, IF auxiliaryamplifiers, variable equalization for group delay and timedelay, IF patching facilities, and baseband regulators. Andprovision is made for bridging off a video signal at any re-peater making the 75A ideal for TV networks.

If you'd like to find out more about 75A and how it hassucceeded in the communications business without even trying,write or give us a call.

Lenkurt Electric Co., Inc.. San Carlos, California. Otheroffices in Atlanta, Chicago, Dallas. and New York City.

LEA/111,697 ELECTRICSUMMAR OF

GENERALTELEPHONE & ELECTRONICS GTECircle 37 on Reador Service Card

No noise after500,000 operationswith Altec rotaryattenuators.Here's proof.No need to get involved in the old-fash-ioned daily cleaning of contacts whenyou use Altec rotary attenuators. That'sbecause Altec attenuators stay clean, asproved in recent tests. We applied a15,000 -Hz tone at -90-db to the attenuatorinput and 90-db gain to the output. Thistest firmly establishes stability, both phys-ically and relative to noise, after repeatedlong-term operations.

Running the units for 500,000 operationsshowed no increase over the insignif-icant residual noise. In a second test,we ran units for 4000 operations,let them idle for four weeks,then repeated the operationsto a total of 50,000. Still no 2

noise.If you think about

it, 500,000 operationscome out to morethan 1370 opera-tions everyday of the

yearwithoutan in-

Altec rotarynoise!Butcrease in

attenuatorsare even better than that, because theywere still going strong and noise -freeafter 500,000 operations!

So, just for old times' sake, go aheadand clean your Altec attenuators once ayear -even if they don't need it!

Here's why Altec rotaryattenuators are best:

1. Pure silver precision -lapped brushes& contacts. By using fine (pure) silverinstead of copper alloy (coin silver), weeliminate the major cause of noise -caus-ing contaminants. Coin silver oxidizes,reducing conductivity and increasingnoise level. Altec's pure silver sulphides,actually forming a wear -reducing lubri-cant. Pure silver is one reason for Altec'slowest contact resistance, less than 1.0milliohm! Altec's solid silver contacts arecold -forged, giving them as much density

3

as silver can have. Compare this to ordi-nary silver plating of competitive units,which is spongy and easily wears off.2. Unique double -nested brushes. Altec'sunique suspension sys-tem permits the useof pure silverbrushes. cJ

4

I Individ-ually sus-

pended brushesmaintain perfect

contact. Bounce andstumble are impossible.3. Unique brush rotor.

Rotor is backed by a thrust5 bearing that eliminates

wobble -plate action. Turn theknob of an Altec attenuator -

you'll feel the difference!4. Cadmium iridite finish protects

steel parts from corrosion.5. Black dulite prevents corrosion oncold rolled steel parts.6. Thrust bearing is made of spring brass.7. Brush tension springs are of berylliumcopper.The most commonly needed Altec rotaryattenuators are available off the shelf forprompt delivery. Custom configurationsmade to your requirements. Write for ournew precision attenuator literature.

New gain set now available

The newAltec

gain set isa precision

test instrumentfor measuring the gain, loss,

frequency response, and signal levelof audio devices. Simultaneous input andoutput and two VU meters permit simul-taneous readings, and the unit can beused for balanced or unbalanced circuits.Write for complete data.

ALTEC0 foes M-

A Division otse7Ling Altec, Inc., Anaheim, California

and is available with 2 or 4 out-lets at 12, 16, 20, 24, 30, 36, and40 db attenuation. Minimum iso-lation between taps is said to be20 db. Price of MC -2 (2 outlet)is $5.45; MC -4 (4 outlet) is$5.95.Circle 69 on Reader Service Card

White -On -BlackTV DispatcherA "Q" tape dispatcher system, de-signed to present news bulletinsand other information in whitelettering on black horizontal tape

transported across the bottom ofthe TV screen, is available fromQ -TV Sales & Distributing Corp.,N.Y.C. The system uses a"Grafic" Q-typer (modified IBMtypewriter) in conjunction witha variable speed tape dispatcher.For sports, stock market quota-tions, election results, etc., infor-mation may be vertically typeton the tape and used with a Q -

crawl with optional stop -frameaction.Circle 67 on Reader Service Card

50w Audio AmplifierA general purpose solid-statepower amplifier designed for mon-itoring applications is availablefrom Langevin, Santa Ana, Calif.

The AM -50 is compatible withthe Model AM - 2A 9 - channelmixer and will supply operatingpower for it by plug-in connec-tion. Amplifier features protec-tion from overload or short - cir-cuit damage.Circle 62 on Reader Service Card

Elliptical WaveguideAndrew Corp., Chicago, is offer-ing a Heliax elliptical waveguide


52November, 1966 - BM/E

EIMAC's new 4CX1500B power tetrode is the most lineartube on the market; intermodulation distortion character-istics under typical operating conditions are at least -40dbat all drive power levels from zero to maximum. The newtube is ideal for advanced single sideband transmittersdemanding high linearity to avoid channel -to -channel in-terference. The 4CX1500B is the product of a four-yeardevelopment study which included optimization of internaltube geometry by computer techniques. Rated maximumplate dissipation of this radial beam tetrode is 1500 watts,and control grid dissipation rating is 1 watt maximum.Because the 4CX1500B has very low grid interception(typically less than 1.5 mA grid current), it is possible todrive the grid positive without adverse effects upon thedistortion level; the tube is therefore recommended forClass AB2 linear amplifier service. For further information,write Product Manager, Power Grid Tubes, or contact yournearest EIMAC distributor.

offers new 1 kW PEPtetrode for SSB withhighest linearity-at least-40 db in typical operation

TYPICAL OPERATION (Frequencies Below 30 MHz)

DC Plate Voltage 2500 2750 2900 voltsDC Screen Voltage 225 225 225 voltsDC Grid Voltage -34 -34 -34 voltsZero -Signal DC Plate Current 300 300 300 mASingle -Tone DC Pla:e Current 720 755 710 mATwo -Tone DC Plate Curren: 530 555 542 mADriving Power 1.5 1.5 1.5 wattsUseful Output Power 900 1100 1100 wattsIntermodulationDistortion Products

3rd Order -38 -40 -40 db5th Order -47 -48 -48 db

EIMACDivision of Varian

San Carlos, California 94070

We have a iew brochureentitled "Single Sideband."Write for your :opy.

November, 1966 -BM/ECircle 39 on Reader Service Card

53

primarily designed for 1.7 to 2.4gc. Type EW-17 is intended toreplace WR-430 rigid waveguideand has an attenuation of 0.29db/100 ft. and average powerrating of 27 kw. With tuned con-nectors, a 200' length has a guar-anteed VSWR of 1.10 or less.Available in lengths up to 500 ft.,it may be formed to a 28" radius.Circle 70 on Reader Service Card

CATV CableA line of 75 -ohm aluminum -sheathed coax cable is availablefrom ITT Wire and Cable Div.,

Clinton, Mass. Available inlengths up to a mile, the cablecan be supplied with polyethy-lene jacket or steel messengerin .412, 1/2, or 3/4 diameters. Eachlength is guaranteed to delivera minimum of 26 db structuralreturn loss from Channel 2 to13; a verified test report is sup-plied with each reel.Circle 84 on Reader Service Card

CATV BridgerBridging amplifiers with mini-mum 53 and 50 dbmv outputson each of two and four legs,

/ A STA IS BORN

FILMLINE'S MODEL FE -50

\ A Processor for Ektachrome FilmProcesses 16mm Color Emulsions at 50 FPM.

Who knows more about building filmprocessors than Filmline?Nobody. Andeverything we've learned has goneinto our newest Ektachrome processor,the FE -50. It is top quality equipmentat a sensible price . . . the result ofFilmline's productive know-how. De-signed and engineered to fulfill therequirements of both large and smallTV stations the FE -50 is the mostversatile, fully automated Ektachromeprocessor ever built. EXCLUSIVE OVERDRIVE SYSTEM -

guarantees against breaking orscratching film. The system is sosensitive that film can be held man -

ADDITIONAL FILMLINE FEATURES: Stainless steel air squeegee Impingementdry box Torque motor for takeup Leak-proof pumps for chemical solutiOns Tem-perature controlled by precision thermistorcontrollers Construction - all metal Tanksand component parts are type 316 stainlesssteel.Recent FE -50 Installations: WEAT-TV, WCKT-TV,WMAL-TV, NBC, CBS, WTOP-TV, A-1 Labs, PrecisionLabs, Film Service Lab.

ually while machine is in operation,without breaking film or causinglower film assemblies to rise.Provisions for extended develop-ment to increase ASA indexes to250 and higher are incorporated.Machine threadup allows use ofstandard ASA indexes or acceler-ated indexes because of Filmline'sFilm transport system features.

EASY-TO-OPERATE-automated con-trols make this an ideal machinefor unskilled personnel.

VARIABLE SPEED DRIVE-speedrange of 5 FPM to 60 FPM forEktachrome emulsions.

Now available: Filmline FE -30 Ektachrome Proc-essor. Speed - 30 FPM. Complete with Replenish-ment System . . . $15,750. F.O.B. Milford, Cone.

For more details write: Dept. BMN-66

/CORPORATION'MILFORD, CONNECTICUT

respectively, are being marketedby C-Cor Electronics, Inc., StateCollege, Pa. Available with directand directional coupler inputs

with -12 and -20 db coupling,the units have minimum 36 dbgain, 13 db maximum noise fig-ure, return loss of 16 db mini-mum on all connections, and -57db cross modulation (12 chan-nels). The modular designbridger is said to reduce persubscriber cost by 20 to 40%.Price is $415.Circle 60 on Reader Service Card

Cartridge RackA walnut Formica finish tapecartridge rack is available fromBroadcast Products Co., Der -

wood, Md. Designed to hold 90cartridges, the Model CR-90measures 22 x 28 x 4 and issaid to feature interlocking con-struction with large openings foreasy cartridge removal. Price is$35.Circle 66 on Reader Service Card

Gold Plated MicsAltec Lansing, Anaheim, Cal. isoffering two special purposegold-plated microphones for usewith religious services, etc. The681A omnidirectional and 683Bcardioid are plated with 22 -caratgold and coated with hard -bakedlacquer. Prices: 681A is $58.50;683B is $84.Circle 56 on Reader Service Card

CATV/Telephone DropA combination CATV/telephonedrop wire is available from

Circle 40 on Reader Service Card54 November, 1966 - BM/E

The case of theunalike look-alikes

(Or why there are no twinsin station automation)

Out of the 5,000 -plus radiostations in the country, are thereany exactly like yours?

Our experience tells us no.We find that regardless ofsimilarity in location, power,personnel, and sound, eachstation has its own distinctivepersonality.

At least as far as automation isconcerned. And that's whywe custom -design ATCautomation systems.

We have to consider such thingsas budget. A good round figurefor full automation is $65.00per week. It could be less.It could be more.

You can buy outright, finance,or lease the equipment.

We have to know what you wantto accomplish with automation.Free announcers from control

room mechanics for moreproductive assignments? Makeyour weekend broadcasts soundas sharp as weekdays withouthiring more men? Automate FMaround the clock, and AM afew hours a day?

ATC can answer any of theseproblems, plus many evenmore complicated.

We can provide three differentcontrol methods for automation:(1) punch card, (2) magnetictape, (3) time/ sequence.

We can provide equipment thatprints your official logautomatically as the materialis being broadcast. We canprovide the original and finest

Circle 4/ on Reader Service Card

tape cartridge units. Plus amultiple cartridge handler thatplays 55 commercials orprogram segments in sequence.

The only way you can know forcertain what your automationneeds are right now is to talk toone of our people. They're allexperienced broadcasters.They know your problems. Theyspeak your language.

To hear them speak it, call309-829-7006. Or write fordetailed information on theflexible features ofATC automation.

AUTOMATIC TAPE CONTROL DIVISION1107 East Croxton AvenueBloomington, Illinois 61702, U.S.A.

GATESGates Radio Company,Quincy, Illinois

- -HARRIS

INTERTVP1


off -the -shelf

AM -FM

TOWERSImmediateDelivery!FROM STOCK ...

. .. TRAIN OR PLANE

Quality fabrication and galvanizing

20 years' proven performance

New package prices with specialwarranty

Let us know your requirements

Stainless, inc.NORTH WALES PENNA. 19454IN CANADA: Walcan, Limited, Toronto, Ontario

Brand -Rex Div., American EnkaCorp., Willimantic, Conn. Con-sisting of a coaxial cable (eitherRG-11/U or RG-59/U), plus twotwisted pair telephone cables andsupporting messenger, the cableis sheathed in a PVC jacket. Alsoavailable with polyethylene burialjacket.Circle 64 on Reader Service Card

16mm CameraThe K-100 16mm professionalmotion picture camera is againbeing made available by East-

man Kodak Co., Rochester, N.Y.The K-100 has a 3 -lens turretenabling use of a combination oftelephoto and wide angle lenses.Said to provide simple film load-ing, the 6 -lb. camera offers in-terchangeable telescopic view-finders, long running motor, 3 -way exposure lever, full -speedrange, and a selection of lenses.Nylon gears permit its operationunder varying temperature ex-tremes. Price with 25mm f/1.9lens and 25mm viewfinder is$530.Circle 93 on Reader Service Card

Tape/Phone PreampA solid-state tape/phono pre-amplifier designed for conven-tional tape heads or phono car-tridges is available from Melcor

Electronics Corp., Farmingdale,N.Y. Noise level of ATP -24 issaid to be 6 db below inherentnoise generated by unrecordedtape. Equalization for 71/2 and15 ips playback. Frequency re-sponse is 20 to 20,000 cps. Priceis $125.Circle 57 on Reader Service Card

*

FAIRCHILDBALANCE/GUARDAn AutomaticProgram LoudnessIntegratorNow through a unique loud-ness (power) sensing system,the FAIRCHILD BALANCE/GUARD differentiates be-tween highly compressed,highly equalized, dense pro-gram material, such as foundin TV commercials, and lessdense, wider dynamic rangeprogram material. By differ-entiating between these twosignals, the FAIRCHILDBALANCE/GUARD automat-ically guards the balance be-tween commercials and reg-ular program audio signals.BALANCE/GUARD thereforeminimizes the tendency oflisteners to either leave theroom during a commercial orto mentally block the spon-sors message. BALANCE/GUARD contributes to listen-ing pleasure which meansless listener resentment, andactually more audio penetra-tion of the sponsors message.Be kind to your sponsors andyour listeners simultaneouslyby using a FAIRCHILD BAL-ANCE/GUARD.

Write to Fairchild-the pacemaker inprofessional audio products.- for complete details.

FAIRCHILDRECORDING EQUIPMENT CORPORATION10-40 45th Ave., Long Island City 1, N. Y.


56

Circle 42 on Reader Service CardCircle 44 for Sony Corp. ad --)110.

Not designed for broadcastingbut it's great to have around the station.

It's the Sony Videocorder® -a video tape recorder with itsown built-in monitor. It can do everything the big expensivevideo tape recorders can do. The only differences are: it'seasy to operate; it's small and portable enough to put in youroffice, even on your desk, and it costs under $1000.Here are just a few places where the Videocorder can payits way at the station. Executives can use it to keep an eyeon programs and commercials - without staying up late atnight. They can exchange tapes with other stations to reviewcommercials or programs-because a program recorded onone Soiy Videocorder can be played back on any otherViJeocc rder.

ACd $350 to tte cost of the Videocorder and you have acomplete TV studio at ycur disposal (camera, microphone,tripod). Now you're ready to tape "live" action-previewideas for commercials and programs.

The Videocorder travels easily from office to studio to home,or wherever you might need it. In its own portable case, it

weighs 66 lbs. Model TCV-201C' costs $995. 2020

costs $1150, comesin a handsome oil -finish walnut casewith built-in timer

for recording programs in your absence. The 2020 isavailable as a deck Model CV -2000D with a wood basefor $695 It's great to hate around the station_How about a free demonstratio 1?Use the coupon.

SONYCorporation .fAme:ica,Dept. H

47-37 V An Dam St. Long Iskald City.N.Y.11101

Gentienen:I'm irierested in the Sony Videocorder. Please:

0 C ill to arrange a free cemc nstation.

0 SfErld me further dttailt ani tte name of my awes: dealer.

Name

Compary

Address

City State Zip

Waaontier s not a be aml tt mold copyrighted materni

HMS

(81w

CABLESFor studio, mobile or remote use, BIW offers rugged, reliable cablesfor color and black and white cameras. All types are offered in com-plete factory wired and tested assemblies, cut to any desired length.Or, they can be had in bulk.BIW TV cables are available for all models of American, British andEuropean cameras. Particularly interesting are the BIW prefabricatedcustom terminations for studio wiring. These provide instantaneoushook-up and save technicians time in providing trouble free installation.BIW has designed and made TV camera cables since TV's inception.Long experience since this time provides the knowledge to producequality cables that:1. Have unusual flexibility that permits easy camera action whether

in complex studios, dirty, wet football fields or sub -zero St. Moritz.2. Have tough, durable neoprene jackets that withstand the rigors

of abuse from dollies, trucks and dragging.3. Have signal and control leads grouped to minimize cross talk.BIW also makes cables for special application television cameras. Letus know your requirements and we will send complete information,catalog and quotations.

BOSTON INSULATED WIREand Cable Company

Boston, Masachusetts 02125El Segundo, CaliforniaEngineering Design & Supplies, Ltd.

Bucks., England

BIW InternationalBoston & Montreal

GEDE BIWClichy (Sein) Frcnce

New BuildingContinued from page 34

My architect, Robert F. Beattyof East Liverpool, is creativeenough to have earned a com-mission from the U.S. State De-partment to build one of our newembassies in an African nation,but realistic enough to be a lead-er in school architectural assign-ments in our area. Once he un-derstood that I had some idea forthe basics, he was able to guideme to the right materials andmethods to make the job attrac-tive and economical.

An architect charges 4% forhis design services, and an addi-tional 2% for his supervisoryservices. Looking back, we aremightly glad we had one. Mr.Beatty caught problems on paperbefore they were too late to solve,and as supervisor of the job, hewas able to correct several con-struction mistakes which wewouldn't have noticed. In thisway, we got a better building andsaved money.

After the plans had been com-pleted, we had the architect ar-range for several firms to bid oneach phase of the work. The gen-eral contract included all but theplumbing, heating and air condi-tioning, and electrical work.There were subsidiary contractsfor each of these areas, and thespread between bids was remark-able - as much as 40% ! We arenow convinced that bidding wasan excellent way of getting theright price.

On the other hand, we did es-tablish some guidelines for se-lecting the firms with whom wewould do business. We wantedlocal firms. All other things be-ing equal, our advertisers wouldget preference. Since it was thearchitect's job to handle and re-view the bids, he executed thesedealings with tact and discretionand in such a way that all bidderswere aware of the requirements.

Of course, throughout the pro-cedure, from the time we ac-quired our land, our attorney re-viewed each legal document in-volved - our lease, land title,etc. His assistance, too, was in-valuable.

Oh yes, the cost: The 2400-sq.ft. first floor cost about $17.50per sq. ft., plus land. That's $42,-000 in all. The total cost of thebuilding was $78,000. These fig-ures include fees, and all itemssupplied by me as landlord, butdo not include the land cost.

58


ii IlglM

IIIft41'i

''"1111

"Now some recorded news from Gemini..."

THE NEW SOLID STATE AMPEX AG -350 IS THEMOST RELIABLE 1/4" RECORDER ON EARTH

Our 350 Series recorders span theentire ages of radio tape recording,and space travel. More than 18,000are in use. Many with more than90,000 perfect hours of loggingtime. Now six of the latest, advancedAG -350 design are at NASA MannedSpacecraft Center, Houston (seeleft). Prime responsibility: to recordvoices of astronauts in orbit for re-lease io broadcasters and news serv-ices. The new AG -350 provides theprime reliability features for anybroadcast use: Super -rigid Ampexplate mounted transport. 100%solid-state electronics with standardplug-in transistors. Plug-in equaliz-ers. Non -wearing glass tape lifters.Straight line tape path. Easy -to -read


giant VU's. Volume -level lock. Lowfrequency equalization adjustment.Tension automatic by reel size.AG -350's are available now for rackmounting, portable or console; monoor stereo; with your choice of two -speeds. For details, contact yourdistributor or mail the ccupon.

To Ampex Corp., Redwood City,California 94063.E Yes, I want more news on the New

Solid State AG -350.E Have your distributor call me.NAME

COMPANY

ADDRESS

CITY_ STATE ZIP

AMPEX

VERSATILE,EASY -TO -USE

ELECTOR

Automatesbroadcast

programming

NewCherry Selector Switch enables you to pre-programbroadcasts-as much as one month ahead!Now-a manual switching device human -engi-neered for rapid, finger-tip selection of your taperecorded commercials, musical selections, stationbreaks, and time announcements. Use it to doyour entire daily, weekly or monthly programmingin minutes!

The Cherry Selector Switch can be installed quicklybecause no soldering is required. And there's nojungle of wires to confuse you or cause problems.It is available in various sizes-from 100 to 2784positions. Write today for full details.

CHERRYELECTRICALPRODUCTS CORP.

166.4 Old Deerfield Road Highland Park, Illinois 60035)

Circle No. 47 on product information card60

BROADCASTERS

SPEAKSirs:I have been looking at the September 1966 issue of BM/Ewith a great deal of interest, particularly at the excellentarticles on station automation.

While in Australia last year on a sabbatical leave ofabsence, I learned that a station manager in Queensland(Mr. G. T. Schmid, General Manager, Broadcasting Sta-tion 4AY, Townsville) made a trip to the U.S. primarilyto investigate automation in American radio stations. Iknow he would be interested in recieving a copy of thispublication and I hope you can put him on themailing list.

Elmer G. Sulzer, ProfessorDept. of Radio and TelevisionIndiana UniversityBloomington, Ind.

We'll do it! Mr. Schmid surely will appreciate your interest inhis welfare.

Sirs:We're very pleased that you used an article about ouroperation (page 30, Sept. issue). However, those # ®%*Gremlins that plague all of us must have gotten intoyour type box and caused our call letters to come outWSCS. (Should be WCWC.)

Seriously, though, we are very much convinced of thevalue of automation. We have had our best successes instreamlining and speeding our traffic and accounting. Wewill happily share our successes with anyone who caresto take the time to ask.

While I'm at it, let me congratulate you on the finequality of your magazine. Keep up the good work!

Arlow D. Bice, Jr., Gen. Mgr.WCWC Ripon, Wisc.

Sirs:I've been meaning to write you for quite some time tocompliment the magazine. Many of the articles have beenvery helpful to our staff.

Iry Laing, Opns Mgr.WQTE Detroit, Mich.

Sirs:AT A SUNRISE BREAKFAST MEETING THIS MONDAY MORNING,OCT. 3, 1966, WE THE SUPERVISORS AND 7 INSTALLERS OF CON-NECTIONS FOR CABLE TV OF SANTA BARBARA WISH TO TELL THECATV WORLD THAT DURING THE PAST WEEK WE MADE 376 IN-STALLATIONS IN 350 MAN HOURS. IF ANY GROUP OF INSTALLERSIN THE COUNTRY CAN BEAT THAT, HARRY BUTCHER, OURPRESIDENT, SAYS HE WILL SEND THEM A BOX OF AVOCADOS.

DALE GILMAN, SUPERVISORTHE MARINES OF THE INSTALLERSCABLE TV OF SANTA BARBARA (CAL.)

P.S. WHILE THE INSTALLERS WERE TRYING TO CATCH UP WITHPUBLIC DEMAND, OUR ORDERS FOR THE SAME WEEK WERE 365.GET SOME MORE MARINES TO CATCH UP!

LOU KEPPLER, SALES MGR.CABLE TV OF SANTA BARBARA (CAL.)

P.S. MAY WE DROP IN ON YOU?

Wire received and hereby acknowledged. Congratulations to boththe Marines and Paratroopers. We can't beat you, but tell StarryButcher we'd love the avocados anyway.

Sirs:I am one of the 20 Asian Journalists invited by the U.S.Government for a 30 -day tour of the U.S.A. I am on thestaff of the Army Television Station, HSATV, Bangkok,Thailand. I am interested in BM/E but have no details.If you promptly give me the information before we leavethe mainland, I expect to send you a (check for) the firstyear membership.

The last of our tour will be at San Franscisco Oct. 10,so send the information (there).

Watt KatchapananHSATV Bangkok, Thailand

Done. Slope you and the others enjoyed the tour, and cancome back again sometime.


Tektronix Television Instruments

Type 526 Vectorscopefor

Chroma-Signal Displayscolor encoder adjustments

differential phase measurements

differential gain measurements

vertical -interval -test -signal (VITS)displays

video tape -recorder setup

Measuring amplitude changes and phaseshifts can be done accurately, conveniently,and independently with the Vectorscope.The Vectorscope presents relative phaseand amplitude displays (of chrominance in-formation in the N.T.S.C. color signal).Dual -trace capability permits simultaneousdisplay of two color signals for precisematching of phase and amplitude. In addi-tion to the vector display, the Vectorscopecan present the chroma signal demodulatedalong any phase -angle with respect to time.

Type 526 Vectorscope $1665Size is 83/4" high, 19" wide, and 18" deep.Weight is ti 45 pounds. Designed for rackmounting.

CIVINVIC

o*

Type 529/RM529 forWaveform Monitoring

vertical -interval -test -signal (VITS)displays

sine -squared pulse and bar testing

transmitter modulation monitoring

YRBG or RBG displays (with color -

processing amplifiers)

video signal -level monitoring

bandwidth measurements

differential -gain measurements

In waveform -monitoring applications, theType 529 and RM529 offer 2 LINE and 2FIELD displays plus calibrated sweep ratesof 0.25 H/cm, 0.125 H/cm, 0.025 H/cm withX5 Magnifier, and 0.005 H/cm with X25 Mag-nifier. They provide 4 response characteris-tics necessary to monitor VITS-FLAT to8 MHz (which assures excellent waveformfidelity for sine -squared testing with 2T, T,and 1/2T pulses), HIGH PASS 3.58 MHz,center frequency, LOW PASS -18 dB at 500kHz, and IEEE 1958 STD 23-S-1. Other char-acteristics include a backporch type DCrestorer, a positive -going field selector, anda full -field line -selector including digital VITline selection.

;6- _0:

0

Type 529 Waveform Monitor . . . $1050(8w" high, 8'/2" wide, 19" deep, weighs 24pounds.)

Rack Mount Type RM529 $1100(55/4" h'gh, 19" wide, 20" deep, weighs 27pounds.)

Power consumption of each model is X80watts - no fan used.

U'. S. Sales Prices, f.o.b. Beaverton, Oregon

Tektronix, Inc. For complete information, contact yournearby Tektronix field engineer or write:

Tektronix, Inc., P.O. Box 500, Beaverton, Oregon 97005

November, 1966 - BM/ECircle 48 on Reader Service Card

61

cTOUGH

WORK?

C.

.4\

HECK NO! ThisALUMINUM

PRE -ASSEMBLED

BUILDING

is Self - Contained with

Wiring and Ventilationinstalled prior to

shipment.1

TOWERS-REFLECTORSPRE -ASSEMBLED

ALUMINUM BUILDINGS

IMMEDIATE DELIVERYWrite for Free Illustrated Brochures

CAW -TV -AM -FM -VHF -MICROWAVE

Atka/ice IndustriesDEPT. B116

705 Douglas St.-Sioux City, Iowa 51101Phone (712) 252.4475-TWX 712-991-1893

Circle 50 on Reader Service Card62

CASEBOOKContinued from page 68

formers; we normally use from oneto four speakers. The switchingcircuit shown in Fig. 4-mountedon the speaker transformer bracketor on the speaker baffle-varies theoutput of each speaker and is quiteeffective in reducing feedback andproviding desired sound levels atvarious locations. Good matchingand fidelity is maintained with thisarrangement, although some varia-tion does exist when operating withdifferent numbers of speakers andvarying amplifier levels.

The remote line feed is bridgeddirectly across the 70.7 -volt ampli-fier output. Since the power re-quired for feeding the broadcastline is so small (less than 0.5 watt)no noticeable amplifier loading or

si

70.7 volt 11no

e.5 watt

5 watt

10 watt

Common

T1

16 ohm

ohm

moon

Fig. 4. Schematic of speaker levelcontrol. S1 -Mallory Type 3115J; T1=standard 70.7 volt -to -voice coil trans-former.

level change is apparent. The 50Kand 25K ohm taps on the transform-er supply approximately 0 to 8 VUto the remote line.

OperationWe found, during operation from

a fair booth for instance, that theflexibility of the system is of muchvalue. During non -broadcast peri-ods we carry station programmingon the sound system by switchingthe remote bridge to the off positionand connecting a jumper cablefrom remote line headphone moni-tor jack to one of the high levelturntable inputs. On a number ofoccasions, taped commercial an-nouncements are fed from the re-corder output into a high-level am-plifier input. A live interview ata fair or an on -the -spot commercialannouncement may be taped byfeeding the tape recorder inputfrom the amplifier tape -out phonojack.

When the system is used only asa remote amplifier (without anyspeakers connected) we connect a25w 300 -ohm dummy load resistorto the 70.7 -volt output terminal toprotect the amplifier. The dummyload handles approximately 16watts dissipation.

While this system has served ourneeds quite well, it may not be theanswer to all situations. However,anyone with a need for such equip-ment can use and expand upon ourdesign.

CINEMA

PRECISION

AUDIO

EQUIPMENTAUDIO ATTENUATORSCinema's new compact rotary slide -wire attenuator is now available foryour mixing consoles as single organged units. A must where smoothcontrol is desired. Other standardtypes are also available for applica-tions demanding precision noiselessattenuation, reliability and long termstability.

GRAPHIC EQUALIZERThe Cinema Graphic Equalizer offersa compact system of extreme flexi-bility. Each of the six controls per-mit the operator to equalize orattenuate that portion of the spec-trum 8 db. This is an active unithaving zeroInsertion lossand up to 35db additionalgain.

DIP FILTERFeatures a notch depthof 50 db minimum andwhich is continuouslyvariable from 30 to9,000 cps. Extremelyuseful for removingsingle frequency noiseand for harmonic dis-tortion measurements.

PROGRAM EQUALIZER

Provides for accurate frequency response correctionsin audio equipment. Easy operation of the two controlknobs allow over 395 curve combinations. Detentedaction of the controls permits reference dial settingsfor future duplication of desired characteristics.

DEGAUSSERSCinema bulk degaussersare a favorite with soundmen throughout the world.Provides erasure of programmaterial and residual noisefrom magnetic tapes onreels up to 17 inches in di-ameter and 2 inches wide.Also, "Pencil" type de-gaussers are available forerasing small areas thusavoiding splicing.

rli-Q's Cinema precision audio equipment is backed byan enviable reputation generated by over 25 years ofoutstanding service in critical sound recording, broad-cast and laboratory applications. Many other customaudio products are available. Put the benefit of ourexperience to work for you. Write for HI -12's Cinemaprecision audio equipment literature today.

Hu-OlDIVISION

AEROVOXCORPORATIONCINEMA PLANT

1100 CHESTNUT STREET, BURBANK, CALIFORNIA 91503

PHONE: 213-849-5511 TWX: 213.846-3578

Circle 49 on Reader Service CardNovember, 1966 -BM/E

BNI/EADVERTISERS INDEX

Advance Industries 62Aerovox Corp. Hi -Q Div. 62Altec Lansing Corp. 52Ampex Corporation ....3, 16, 50, 59Anaconda Astrodata 36, 37, 45Automatic Tape Control 55Belden Mfg. Co. 17Blonder Tongue Labs., Inc. 12Boston Insulated Wire & Cable Co 58CBS Laboratories 5Cherry Electrical Products Corp 60Cleveland Electronics, Inc. 14Collins Radio Co. 15Craftsman Electronic Products 16Dayton Electronic Products Co. 50EIMAC Div. of Varian Assoc 53Fairchild Recording Equipment

Co. 56Filmline Corp. 54Fort Worth Tower Co. 64Hewlett-Packard 8International Nuclear Corp. 41Jerrold Electronics Corp. Cover 2Lenkurt Electric Co., Inc 51McMartin Industries 10, 11Metrotech, Inc. 48Moseley Associates 443 M Co. (Magnetic Products

Div.) 19Nortronics Co. 44RCA Electronic Components and

Devices 43Riker Industries, Inc. Cover 3Rodelco 50Rohde & Schwarz 7Sarkes Tarzian Cover 4Schafer Electronics 47Sony Corp. of America 57Sparta Electronic Corp. 63Stainless, Inc. 56Superior Cable Corp. 35Tape-Athon Corp. 34Tektronix, Inc. 61Townsend Associates, Inc. 49Vitro Electronics 46Wilkinson Electronics, Inc. 9

ADVERTISING SALES OFFICESBryce Gray, Jr., PresidentMal Parks, Jr., Publisher

NEW YORK AREA820 Second Ave., New York. N. Y. 10017

F. F. Pete McAdams 212 -MO 1 0450NEW JERSEY/PHILADELPHIA820 Second Ave., New York, N. Y. 10017

Charles C. Lenz 212 -MO 1-0450NEW ENGLAND41 Stevens Lane, Cohasset, Mass.

Don Kennedy 617-383-0029MIDDLE ATLANTIC18 Frederick Rd., Thurmont, Md. 21788

Mal Parks, Jr. 301-271-7151MIDWEST612 No. Michigan Ave., Chicago, Ill.

Charles E. Moodhe 312 -MI 2-3774Dave Gibson

22310 Blossom Dr., Rocky River 16, OhioAllen "Bud" Prymmer 216-228-1550

SOUTH CENTRALMedia Representatives, Inc.

7900 Carpenter Freeway, Dallas, TexasJoe Sissom; Parker Harris 214 -ME 1-4480

WEST COAST1245 E. Walnut Street, Pasadena, Calif.

Lawrence C. Papp 213-795-1528Los Angeles: 213-684 0590

Jules E. Thompson Co.681 Mar 1,,t Street. San Francisco, Calif.

Jules Thompson 415 DO 2-8547William Healey

IT'SYOUR

MOVE !MAKE THE

MOST OF IT .

with SPARTA'S Showcase Audio Control Center

TIME!

If your plans include amove or remodeling of your

facilities, SAVE INSTALLATIONSAVE MOVING COSTS! GAIN FLEXIBILITY!

These new mix 'n match cabinet units have the customlook of richness and quality; yet they save you moneybecause they come to you all ready to install. Let SPARTAshow you how many ways you can save on your next move!

The New A-20 Audio Con-sole IS A REAL MOVER!SPARTA moves you intoexpanded capability, fast!-with this sleek styledconsole. The NEW A-20has 22 inputs, 8 mixers with both audition and programmixing. Other quality features include relay muting,individual electronic modules, self contained powersupply, monitor & cue amplifier, to name just a few --and it's completely transistorized.

IMF SPAELECTRONIC CORPORATION

5851 FLORIN-PERKINS ROAD SACRAMENTO, ALIFORNIA (916) 452-5353

Circle 51 or, Reader Service Card

November, 1966 BM:

LITERATUREce INTERESTFor additional data, circle No.shown on Reader Service Card.

CATV lease -back guidelines avail-able from First National Planning.Corp. 101

Automated programming equip-ment brochure from ContinentalElectronics discusses dual intermixand sequential intermix systems.

102

Video analyzer described in tech-nical bulletin from Colorado Video.Includes prices, specifications. 108

THE

LEADE

IN

"Qualify-Service

Yes, quality, service and priceon CATV systems are the rea-sons for Fort Worth Tower's po-sition as the industry's leadingsupplier. Experience gained asa pioneer supplier of CATV en-ables Fort Worth Tower to pro-vide you with a quality productat a price that is reasonableand attractive.

Take advantage of our experi-ence. For assistance in systemsplanning, engineering and com-plete systems quotations . . .

CALL OR WRITE TODAY

7epa ?And ?overCOMPANY, INCORPORATED

P.O. Box 8597, Fort Worth, Texas(817) JE 6-5676

- Associated Companies -Tommy Moore, Inc.-Big State Engineering, Inc.

Tower Construction Finance, Inc.


MATV products catalog fromBlonder -Tongue Labs includes con-version, amplification, distributionequipment. 109

Flutter meter described in technicalbulletin on Micom Model 8100/8100-w. 110

Acoustical doors listed in brochurefrom Overly Mfg. Co. Includesacoustical test data. 111

Communications antenna for 2 -wayradio, citizens band, TV and FMreception described in bulletin fromCushcraft. 112

ETV information contained in "Aview of Educational TV" from GPLDiv., General Precision. 113

ITV in music education discussed inNational Center for School and Col-lege Television supplement. 114

5w microwave equipment for longhaul video systems described in datafrom Collins Radio. Discusses IFheterodyne MW -009E. 115

Weather -Scan CATV informationchannel equipment described inflyer from R. H. Tyler Co. 116

Automatic broadcast systems de-scribed in literature packet fromSchafer Electronics. 103

CATV amplifiers designed for highlevel application described in litera-ture from Craftsman ElectronicProducts. 117

Cases for portable equipment listedin catalog from Skydyne, Inc. In-cludes 29 standard thermoplastictypes. 118

Photographic solution mixing andtransfer tank described in technicalbulletin from Houston -Fearless. 119Automated programming and back-ground music systems discussed inbooklet from Tape-Athon. 104

Microwave antenna literature fromGabriel Electronics describes 4 -port -rear -fed dual -frequency type. 121

Standby generators discussed in 8 -page folder from Cummins Diesel.Lists capacities, engine specifica-tions, fuel uses, etc. 122

CATV amplifiers for high leveltrunk and distribution described inXDR line brochure from AnacondaA strodata. 120

Audio console data sheet fromWard Electronic Ind. lists featuresand specs of custom types. 124

Video recording tape specificationsheets in folder from Memorex.Covers color and black -and -whiteapplications. 125

Color film camera described in 8 -page catalog insert from G -E. Listsspecifications and application dataof PE-240-A/B 4V system. 126

PA equipment listed in 16 -pagecatalog from Electro-Voice. In-cludes mics, speakers, baffles andhorns. 127

Lenkurt "Demodulator," publishedmonthly, features information onvoice, data, video transmission. 129Automated programming system de-scribed in detailed data from Auto-

matic Tape Control. IBM punchcardsystem may be customized. 171

"Video Switching Techniques," 32 -page booklet published by Dynair,describes video and audio switch-ing techniques. Includes many pic-torial diagrams. 130

Kinescope recording camera de-scribed in catalog sheet from D. B.Milliken Co. Includes specificationsand operational data. 131

FM multiplex exciter described in4 -page folder from Standard Elec-tronics. Includes transmittermodernization data. 132

Tape cartridge playback system cm -scribed in brochure from BroadcastElectronics. Includes 10 -spot multi-channel programmer. 133

Audio amplifiers listed in 6 -pagefolder from McMartin. Includes LT,MA series and mixer-preamp. 134

Tropo scatter parabolic CATV an-tenna systems described inSPADECO literature from Ft.Worth Tower. 136

CATV audio/video head -end controlunit described in technical data fromBenco Television Corp. Benavacprovides automatic control. 153

Programmable cartridge tape re-corders for audio automation de-scribed in brochure from KRS In-struments. 143

2500-mc ETV system illustrated inbrochure from Micro -Link. Tells ofHouston's 2 -channel Spring BranchIndependent School system. 154

Measurement instrument applica-tions discussed in periodical "News"published by Rohde & Schwarz.Presents in - depth information invarious fields. 169

Cartridge manual, with cross-refer-ence listings of 5,700 phono pickups,from Sonotone Corp. 182

Tropo scatter parabolic CATV an-tennas described in literature fromHosken Cable TV Antennas. 135

Tube data, thumb-indexed quick ref-erence brochure of English Electricpower valves, microwave devices,electron - optical tubes, and otherequipment. 178

Studio lighting catalog, describingline of Mogul quartz "converta" spot-lights for updating existing systems,from Packaged Lighting Services. 179Television stands for ETV classroomreceivers described in flyer fromGeneral Television Network. 180

CATV systems engineering datapre-sented in booklet from CascadeElectronics. 174

Color bar generator described inspecification sheet from Riker In-dustries. Model 5618 provides en-coded color bar signals. 175

TV STL equipment described in de-tailed specification data from Micro-wave Associates. 190

Books on all phases of radio-TV-CATV, many unavailable from othersources, fully described and illus-trated in 18 -page literature packagefrom TAB Books. 170

64 November, 1966 - BRIE

CLASSIFIEDCost of regular Classified Advg. in BM/E isonly 14 per word, with a minimum chargeof $2.00. Display classified advg. rates are$17.50 per inch on a one-time basis; $12.50on a 12 -time schedule. No extra charge forbox number. Send all replies to Box No..BM/E, 18 Frederick Rd., Thurmont, Md.21788.

BUSINESS OPPORTUNITIES

111111111111111111111111111111111111111111111111111111111111111

CA TV Investment

System ready for construction. Po- jtential over 75,000 households.Seeking company to participate aU

.-- financially. Located in poor recep-a Lion area in Pennsylvania. j

=Box 116.1, c/o BM/E

IT1

Financial assistance desired. EstablishingChristian radio station. Eight years broad-casting background. First phone. Box 116-2.% BM/E.

POSITIONS WANTED

AWARD -WINNING NEWSMAN

Now with Network O&Oseeks affiliation as news director with pro-gressive broadcasting operation.

15 Years' Experience$10,000 yearly minimumBox 116-3, c/o BM/E

Negro dj and newscaster. 3 years experi-ence. Graduate from New York School ofAnnouncing and Speech. Write Al Williams.733 Chauncey St., Brooklyn, N. Y. 11207,call 212-453-2556.

Disc jockey -announcer -producer -20 yrs. exp.-Jazz -Blues -rock and roll -Spirituals -awardwinner -syndicated columnist -age 39-Negro-Mannie Mauldin, Sutherland Hotel, 4659Drexel Blvd., KE 6-7676-Chicago, Ill.

First phone top-forty-C&W. Have 1 yearexperience. Will relocate Ga., Ala., Fla.Willing to work hard and learn. No sales.Paul Bowden, P.O. Box 1183, Clewiston, Fla.

Girl-first phone, student . . . announcing,news gathering, woman's program, traffic. . . family . . . Box 265, New York City,10036.

HELP WANTED

NEEDED IMMEDIATELY. Engineers ex-perienced in the following job categories:Video tape maintenance and recordists;live color video; studio supervisors; trans-mitter maintenance. The above positionsare all top salary. Send your resume orinquiry to the Amps Agency -3974 WilshireBlvd., Los Angeles, California 90005

By Broadcasters-For Broadcasters.

Television technician for new communica-tion center on campus of dynamic -expand-ing, mid -western university of 11,000 en-rollment. Complete benefit program. Ex-perience in closed-circuit and broadcast en-gineering. FM and I0 TV. Person compe-tent in VTR. First class FCC license re-quired. Maximum age 55. Contact WilliamR. Freed, Personel Officer, Room 8. Ad-ministration Building, Ball State University,Muncie, Indiana.

Chief Engineer, capable of doing some airwork for 1000 watt station. WSWV, Penning-ton Gap, Virginia 24277. Phone 703-546-2520.

HELP WANTED (continued) HELP WANTED (continued)

TELEVISIONENGINEERSWe are interested in contacting 10Station Engineers capable of designor field engineering. Excellent oppor-tunities in TV Development Engine-ering and Systems Engineering withSarkes Tarzian, Inc., BroadcastEquipment Division.

TV station engineering experiencerequired, BSEE or equivalent desir-able. Send resume of experience, orcall, Mr. Biagio Presti, BroadcastEquipment Division, Sarkes Tarzian,Inc., Bloomington, Indiana, AreaCode 812, 332-7251.

Symbolt of .Excellencein Electronics

,.. }SALES OPPORTUNITY

Pepper Sound StudiosNational Headquarters: 51 S. Florence

Memphis 4, Tennessee

is expanding their national field forceand is interested in attracting execu-tive caliber salesmen. Only applicantswith a record of 5 figure income (orover) need apply.

If interested, send resume and picture.

Our employees are aware of this ad.111

PRODUCTION MANAGERWITH FIRST TICKET

Must be skilled commercial announc-er, with ability to create and producetop quality spots. $8-10,000 PLUSCOMPANY PAID INSURANCE, RE-TIREMENT PROGRAM and otherFRINGE BENEFITS.

Box 116-4, % BM/EMICIOCCICSICIMMIC$3010010410

.44./

Microwave Installer Repairman. Applicantsmust have second class license with radioand multiplex experience. Excellent pay,vacation, holidays, insurance, retirementand opportunities. Send salary require-ments, employment history and completeresume to: Plant Manager, Post Office Box308, Fairfield, Texas. All replies confiden-tial-an equal opportunity employer.Rapidly expanding non-commercial stationneeds additional experienced first phoneradio -TV engineer. Call or write WilliamLeutz, WBGU-TV, Bowling Green, Ohio,Bowling Green State University. An equalopportunity employer, will give considera-tion for employment without regard to race,color, creed or national origin.Chief Engineer experienced all phases ofAM -FM radio station technical operationand maintenance, including directional ar-ray. This is permanent job with growingfirm. Car necessary. Phone or write, HowardB. Hayes, Vice President, WPIK-WXRA,523 First Street, Alexandria, Virginia 22314.Phone (703) 683-3000.

Want announcer with 1st phone. No main-tenance. 10,000 watt NBC affiliate in collegetown of 25,000. Good salary, good future.Call or write KOAM Radio, Pittsburg,Kansas.

Salesmanager for ABC station. New modernplant, local color, VTR. Great local busi-ness, real ground floor opportunity withtop flight organization. Contact Pete Cotic-chia, WJET-TV, Erie, Penn.

WSBT & TV offers young technician thechance to join top -rated progressive station.Many area firsts including local color trans-mission. Will train tech school graduatewith first class license and military satis-fied. Write personnel director, South BendTribune, South Bend, Indiana 46626

Announcer with 1st phone who can handlecontemporary music. Well established AM -FM network affiliate, owned by TV group.Opportunity to become chief engineer.Phone collect 218-233-1522, KVOX, Moor-head. Minnesota.

WTOC-AM-FM-TV Savannah, Georgia, hasopening for first class engineer with experi-ence Reply by letter to Chief Engineer,WTOC, P.O. Box 858, Savannah, Ga. 31402.

Needed immediately-Two control room en-gineers for expanding ETV operation. Mini-mum 2nd class license. Color experiencehelpful. Send resume to Mr. Brent, WHRO-TV, 5200 Hampton Blvd., Norfolk. Va. 23508

KGUN-TV, in Tucson, second largest cityin Arizona, needs an engineer with first orsecond phone. Opportunity to join progres-sive growing Gilmore Group of stations.Contact Studio Supervisor, Box 5147, Tucson,Ariz.

Continuity/announcer-commercial copy ex-perience, ability to head department. Ap-proximately 2 hours airwork daily. Sendbackground to George J. Volger, Gen. Mgr.,KWPC, Muscatine, Iowa. 319-263-2442.

Immediate opening for creative, experi-enced CATV Sales Manager. Top Salary,Unlimited Future. Relocate in Southwest.Reply to Box 116-5, % BM/E.Experienced television broadcast engineer.Replies confidential. Send resume andphone number to Bob Anderson, KIMA-TV,Box 702, Yakima, Washington.

Newsman. Night shift. 48 hours. Sundayoff. Hard hitting three man crew. Stronglocal news. Warren Boldt, News Director,KROS, Clinton, Iowa

Wanted immediately - Studio technicianswith first class license. Top wages. Largemarket VHF station. Contact Arthur Bone,WJRT-TV, Flint, Mich. 313-239-6611 collect.

Engineer first class license. Experience pre-ferred but not necessary. Send resume toRadio Station WCHV. Attn.: Art Brown,Charlottesville, Va. Phone 703-295-5121.

Fulltime news director to gather, write, andair local news. Challenging opportunity,college community. KHAS, Hastings, Ne-braska.

Immediate opening - television technician.1st phone required. Contact Charles W.Baker, C. E. WTPA-TV, Harrisburg, Pa.

EQUIPMENT WANTED

Wanted: High -frequency loop for RCA308-B field intensity meter. Will considerpurchase entire unit if price is right. TedHeithecker. 1409 Cooper Drive, Irving.Texas 75060.

Wanted immediately -1 kw or 500 wattGates xmtr. not over 5-7 years old. Con-tact. MEDIAmerica, 9414 Crosby Rd., SilverSpring, Md. 20910.

600 foot guyed tower capable of supportingRCA TFU 30J Pylon. WACO Radio, Waco,Texas.

We buy worn-out oscillating tubes, 10 kwand up. We pay freight. Sharon MachineryCompany, 49 Gilbert, Quincy, Mass. 02169

EQUIPMENT FOR SALE

ITA-FM-Exciter, may be used as 10 watttransmitter - $700.00; Harkins MultiplexModulation Monitor-$300.00; Western Elec-tric Limiting Amplifier-$80.00; 2-40 Watt PAAmplifier 50011 Output-$50.00 per; MonitorAmplifiers and Control Unit Model EMA-$50.00; Power-Stat Variable Transformer -3sections- Reversible Motor-$150.00; GatesStudio eHe-$600.00; 2-Thorens TD -124Turntables including tonearms and cartridg-es-S50.00 each; 3 -Gates GR16 Tonearms-$50.00 each; Chief Engineer, WSOM, Salem,Ohio. Phone 222-2075.


EQUIPMENT FOR SALE (cont'd.) EQUIPMENT FOR SALE (cont'd.) TECHNICAL SERVICES (coed.)

COMPLETE OPERATINGMOBILE UNIT

MONOCHROME

AVAILABLE AFTER CBSFOOTBALL PICKUP, DEC. 10th

CONSISTING OF, IN PART:1 Converted V-8 Ford Bus,

Model 69B

4 RCA TK-30 Camera Chains 1 Complete RCA Microwave

Link 1 RCA Field Switcher 1 Custom-built 6x5 Lap -dis-

solve Switcher 1 Collins 4-pos. Remote Amp. -

complete1 Portable Trailer -type P47

Gasoline Power Generator6 kw.

2 Carrier Air conditioners

Box 116-6, % BM/E

TEL. NO. 301-377-2222

:TUBES -LARGEST STOCK IN U.S.A.Quotations answered same day.We also BUY unused Tubes

Write: BARRY ELECTRONICS,Dept. BM/E

512 BROADWAY, N.Y.C., N.Y. 10012(212) WAlker 5-7000

ELECTRON TUBES lystrons ATR & TR MagnetronsSubminiatures C.R.T. T.W.T. 5000-

6000 Series SEND FOR NEW CATALOG A2

A & A ELECTRONICS CORP.1063 Perry Annex

Whittier, Calif.698-3032

Portable battery tape recorder (4 lbs.) withbroadcast quality, solid state, for salesmanselling air time or covering news events atthe scene. Tested and used at our station.Ten day money -back trial, 90 day warranty.After hearing this machine you'll purchasea half dozen. Price $39.95 pre -paid. Will bethe best buy you ever made in radio equip-ment. Send check to: W.L.V.P. Electronics,Franklin, New Jersey.AMPEX 600 SERIES USERS, gain up to 20db S/N ratio using VIFKIT 10001 6F5 re-placement adaptor containing selected (forlow noise) 7025. For postpaid delivery sendcheck for $10.00 each to VIP INTERNA-TIONAL, P.O. BOX 1555, MOUNTAINVIEW. CALIF. 94040.

NEED COAXIAL CABLE NOW?Large Inventories -Immediate Delivery

Call, Wire or WriteWINDSOR DISTRIBUTORS

48 Fulton St.-Bklyn, N.Y. 11201(212) MA 4-7039

Hi-Fi Components, Tape Recorders, at guar-anteed "We will not be undersold" prices.15 -day moneyback guarantee. Two-yearwarranty. No Catalog. Quotations Free. Hi -Fidelity Center, 239G East 149th St. N. Y..N. Y. 10451.

New and Reconditioned Remote Pickup and2 -way radio equip., Fire and Police Receiv-ers. All brands and models. Sales Manager,Box 738, Phone 817-594-5171, Weatherford,Texas.

New QRK turntable, all models available.Cash or will trade for any type of usedequipment regardless age or condition. Au-diovox, 4310 Sw. 75th Ave., Miami, Florida.

'Audio Equipment-Whatever your needs,check us first. New and Used. Ampex, Altec,AKG, EV, Fairchild, Neumann, Langevin,Rek-O-Kut, Uher, Viking. Send for equip-ment list." Audio Distributors, Inc.. 2342 S.Division Ave., Grand Rapids, Mich.Broadcast equipment bought, sold and trad-ed. Ampex, McIntosh, Crown, Gates, etc.Leasing and financing available. F.T.C.Brewer Company. 2400 West Hayes Street,Pensacola. Florida.

Automation-Complete operating system byAudiomation Labs. Good condition. Switch-ing circuitry incorporates Zenith timers.Three 14 -inch reversing decks. $4,000. WCOARadio, P.O. Box 1669, Pensacola, Fla. 32502.

Something slipping? Try Vita Drive rubberdrive cleaner on your tape playback equip-ment. Recommended by many stations. $1.251 oz. bottle. Postage prepaid. NO COD's.Friend's Manufacturers, 135 N. 4th Street,Philadelphia, Pa. 19106.

Collins 20 kw transmitter, 20-50mc range.$16,500 Westinghouse 10 kw. Audio ampli-fier 30-10,000 cy single or 3 phase. WheelerElectronics Co., 3558 W. Lawrence, Chicago,Ill. 60625. (312) 588-1443.

RCA BN-6B Portable mixer -amplifiers, 77 -DX or BK-1A microphones, Magnecord814-X tape reproducers. Box 136 Rowayton,Conn.

FOR SALE. RCA type 5C, 5 kilowatt trans-mitter. Water Cooled. $1,000 FOB, Farming-ton, Conn. For details, contact Greg Fortune,Radio Park, WRCH, Farmington, Conn.

SIGNS, NAMEPLATES, LABELS, Decals ofall kinds. Badges, Trophies and Plaques.Free samples. Seton Corp., Dept. BME, NewHaven, Conn. 06505.

For Sale: Ampex PR -10-2 recorder in ex-cellent condition. Operated less than 100hours. Phone 616-927-3044 or write 1302Ogden, Benton Harbor, Mich.

Heavy poly sleeves for 1p Jackets. 5t min60 light round bottom polys for records 3*min 100. Poly Company P.O. Hillburn, NewYork 10931.

G.E. Phono cartridges for broadcast use.Prompt service. Send for price list. RidgeAudio Co., 91 E. Lake Rd., Skaneateles, N.Y.13152

Whatever your equipment needs . . . checkfirst with Broadcast Equipment and SupplyCo., Box 3141. Bristol, Tennessee.

Heliax Coaxial cable HJ5-50 type, new 590ft. FOB, E.E.E.E., P.O. Box 2025, La Mesa,California.

TECHNICAL SERVICES

AMPEX HEAD ASSEMBLY RECONDI-TIONING SERVICE for all Ampex pro-fessional model recorders. This profes-sional service features precision relap-ping of all heads for maximum headlife. Your assembly is thoroughly clean-ed and guides are replaced as required.Price includes optical and electrical in-spection and complete testing on Ampexequipment in our plant. Full track orhalf track assemblies . . . $35.00. One totwo day service. "Loaner" assembliesavailable if necessary. LIPPS, INC., 1630Euclid Street, Santa Monica, California90404. (213) EX 3-0449.

CAMBRIDGE CRYSTALS

PRECISION FREQUENCY

MEASURING SERVICE

SPECIALISTS FOR AM -FM -Tv445 Concord Ave. Phone 876-2810

Cambridge, Mass. 02138

AMPEX authorized Sales and Service. Newand used equipment for sale. 48 hour serv-ice on most repair including head rebuilding.Other professional equipment also available.

ACCURATE SOUND COMPANY, 15 N. Tyler,San Angelo, Texas AC 915 949-1904.

JACKSON

COMMUNICATION

BROOKVILLE,01110 CORPORATIONCATV Engineering & ConstructionP.O. Box 96 Brookville, 0. 45309

Phone: 513-833-2184

VIDEO TAPE RECORDERAUDIO HEAD ASSEMBLY SERVICE

Precision relapping of all heads and sup-porting posts, including cleaning andtesting. Ampex head assembly with"cue" tracks, $75.00 complete. RCA unitsalso relapped. One to two day service.LIPPS, INC., 1630 Euclid St., SantaMonica, Calif. 90404. (214) EX 3-0449.

AMPEX VIDEO TAPE RECORDER AUDIOHEAD ASSEMBLIES REBUILT. Assemblieswith cue track lapped $100.00, without cuetracks, $80.00. New heads for assemblieswithout cue track $220.00, with cue track$310.00. Assemblies without cue convertedwith four new heads $350.00. TABER MAN-UFACTURING & ENGINEERING CO., 2619Lincoln Ave., Alameda, California.

AMPEX HEAD RECONDITIONING SERV-ICE for 300's, 350's, 351's and 354's, includesthe relapping of worn or grooved heads, andthe same complete alignment and qualitycontrol testing as new head replacements.Full and half track assemblies $45.00, twotrack $60.00. TABER MANUFACTURING &EQUIPMENT CO., 2619 Lincoln Ave., Ala-meda, California.

AMPEX HEADS replaced in your 3 head300, 350. 351 assembly. Our heads are manu-factured under controlled laboratory condi-tions and are guaranteed to meet or betteroriginal equipment specifications. Full trackand half track $97.50. We will send freebrochure. TABER MANUFACTURING &ENGINEERING CO., 2619 Lincoln Ave., Ala-meda, California.

YOUR RESUME-Make it sell you! Instruc-tions, samples: $2. Executive, Box 246BM,Montclair, N. J. 07042.

Cartridges rewound: 40 sec., 85# each.NUKART, 122 N. 15th St., Richmond, Ind.

PROGRAM SERVICES

COMPLETE CATV PROGRAMSERVICES

Features-Westerns-Cartoons-SportsHalf-hours-Variety

American Diversified ServicesBox 975, Kingsport, Tennessee

Phone area 615 239-9301

BEST BUY IN BUDGET$ RADIO JINGLES $

Audible Advertising, Inc.

663 Fifth AvenueNew York, N. Y. 10022

DEEJAY COMEDY MATERIAL-We special-ize in One Liners, Station Breaks, Bits, Gags,Fillers. Sample "Jockey Joker" file $2.00-Write for free "Broadcast" catalog. Show -Biz Comedy Service (Dept E) 1735 East 26Street, Brooklyn, N. Y. 11229

Attention top forty stations! Weekly ideaservice sparkles programming, one subscrib-er per market. All ideas fresh, money -mak-ing, audience -building. Write or call now.Lee Abrams, 2038 Vardon Lane, Flossmoor,Illinois, 799-5270 (312)

"Sponsorettes," 50 successful, different salesspots per week for hard to sell accounts-$1.00 weekly -54 for sample week, or writefor free information. Nationwide Stations,Inc. P.O. Box 2121, Toledo, Ohio.43603

Astrological Forecast Scripts-daily, $4.00per week. Box 8241, Pittsburgh, Pa. 15217.

INSTRUCTION

FCC License in six weeks from the nation'slargest license school. Compare reputationsand success rates before you invest. Pro-fessional announcing training on the na-tion's only fully school -operated commer-cial station used solely for training. Schoollocations in Dallas, Atlanta, Chicago, NewOrleans and Minneapolis. Write Elkins In-stitute, 2603 Inwood Road, Dallas, Texas75235.

"It's REI and Here's Why I" First phone li-cense in (5) weeks-and we guarantee it.Tuition only $295. Rooms $6-12 per week.Classes begin every 5 weeks in beautifulSarasota by the sea, on Jan. 2-Feb. 6-Mar. 13. Call or write Radio EngineeringInstitute, 1336 Main St., Sarasota, Fla.Broadcasting, FCC License Preparation,Communications Electronics, taught quickly-resident classes; correspondence. Free de-tails. Write: Dept. 6-B, Grantham Schools,1505 N. Western. Hollywood, Calif. 90027.

F.C.C. First Phone in 6 weeks plus 300 hourstheory and practical application. Licenseguaranteed. Free placement service. Flori-da Institute of Electronics, 3160 Main St..Weirton, W.Va.

First Class License. Ten week course. 300hours theory, lab and practical training$395. Atlanta School of Broadcasting, 52 11thStreet, N.E., Atlanta, Georgia.

AUTHORS WANTED

Authors for engineering and managementbooks wanted by leading publisher. Box116-7, c/o BM/E.

CONSULTANTS

000MALARKEY, TAYLOR & ASSOCIATES

CATVBrokers -Consultants -Engineering

WASHINGTON, D.C.1101 17th St., N.W. Area Code 202 223-2345

VIR JAMESCONSULTING RADIO ENGINEERSApplications and Field Engineering

345 Colorado Blvd.Phone: (Area Code 303) 333-5562

DENVER, COLORADO 80206Member AFCCE

CARL E. SMITHConsulting Radio Engineers

AM, FM, TV and CATV8200 Snowville Road

Cleveland, Ohio 44141Phone: 216-526-4386

Member AFCCE

BROADCASTENGINEERING SERVICES, INC.

Walter R. Hario, President

5305 Raymond Road TelephoneMADISON, WIS. 53711 608/233-9549

STANCIL-HOFFMAN CORP. BROADCAST REFERENCE & LOGGING

RECORDER24 Hours Continuous -7" Tape ReelFrom 1 to 4 Separate Channels

Also 7.5 IPS STEREO & MONOFor Automated Stations

921 N. Highland Ave.,Hollywood, Calif. 90038

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.1



67

ENGINEERINGCASEBOOK

Combination Remote Broadcast

and PA Amplifier

By Robert J. Hendrick

AT FAIRS, carnivals, beauty andtalent contests, church serv-

ices, store openings, etc., both abroadcast remote amplifier and apublic address system often areneeded. By using a combination sys-tem, we were able to eliminate halfthe number of microphones and ca-bles which always end up in a tan-gled mess. The system also mini-mizes the problem of coordinatingthe operation of two systems.

Equipment

We established these minimumrequirements: (1) The equipmentmust be compact, light, and simple;(2) It must serve as a PA systemonly, as a remote amplifier only, oras both simultaneously. For our re-quirements we needed an amplifierwith at least two high-level inputsfor turntables, tape recorder, tuner,etc., and at least three inputs foreither low or high impedance micro-phones. We chose the Knight ModelKN-3050, which has four high impe-dance microphone inputs with op-tional plug-in low impedance micro-phone transformers, and threeturntable inputs. The amplifier alsohas an output -level meter, tape re-corder feed, and excellent frequen-cy response characteristics.

Fig. 1. View of completed unit andspeaker.

In selecting a turntable, we want-ed a light -weight unit that requireda minimum amount of space aboveand below the mounting board. TheBogen B-61 turntable and arm re-quires only a 21/4 -inch mountingdepth, permitting the use of a shal-low console -type housing (overalldepth only 41/2 inches). We choseElectro-Voice Music -Caster PAspeakers, which can be mounted onan Atlas SS -2 portable stand whennecessary. These speakers have ex-cellent reproduction characteristicsand are trim looking whether hungon a wall, set on a shelf or table, orused with the portable speakerstand. Fig 1 shows the complete sys-tem.

Construction DetailsTo construct the console, we used

plywood covered with Formica forour basic material. A No. 2 orlower grade 1/2" plywood is satis-factory since all visible areas arecovered with Formica. We recessedthe bottom 1/2" above the outsideband in order to obscure the legmounts. Legs, microphones, cables,etc., are stored in a compartmentalong the back edge running theentire length of the console. Sincethe overall console dimensions are51" x 19" x 41/2", it can easily betransported in the rear seat ortrunk of any standard size automo-bile. Standard %" pipe legs-withrubber cane or crutch tips on theends-screw into standard flanges.Some compensation for uneven sur-faces can be achieved by tighteningor loosening the legs.

The console was so designed thatall cables would enter from the bot-tom through a 21/2" x 12" slot cutbeneath the amplifier to accommo-date microphone, speaker, power,and remote broadcast cables. ACwiring includes surface -mount ACreceptacles in each turntable com-partment and a standard 2 -outlet

Mr. Hendrick is Chief Engineer,WKCT Bowling Green, Ky.

Fig. 2. Detail showing receptaclemounting. Storage compartment lidis in open position.

OffO

PIA

50000 elms

45000 ate.

0t

Fig. 3. Schematic diagram of externalswitching unit. S1 -Mallory Type3123J; T1-UTC Type A10; R1, R2 -2k,Y2w; J1-2 circuit normally -open jack,insulated from cabinet with fiberwasher; mini box - Bud Type CU -2103 -A.

AC receptacle behind the amplifier.Primary power is supplied to amale AC receptacle, mounted in theupper right-hand divider cornerand connected to the AC line feedcable with matching female plug.

Since the equipment is transport-ed quite frequently and subjectedto considerable vibration and jolt-ing, it was necessary to devise ameans of securing the pick-up armsand cartridges. We used a suitablelength of 1/4" aluminum tubing as aspacer and a Keystone Type 90miniature battery clip, bolted to theturntable mounting plate at thecorrect arm position.

Equipment ModificationThe PA system is operated as a

conventional sound installation.However, in order to feed a remotebroadcast line, we designed an out-board bridging, switching, and ter-minal arrangement. The bridgingtransformer, switch, remote line ter-minals, and cue headphone jack aremounted in a small "minibox" bolt-ed to the upper center of the ampli-fier cabinet. The remote line feedis independent of the PA system(and vice -versa) by using the bridg-ing and switching circuit shown inFig. 3. The 70.7 -volt output con-nection allows us to use speakerswith individual matching trans -

Continued on page 62


the magazine of broadcast management ......we wear these out. at the present rate of deterioration,...

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