jensen transformer catalog 1977

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wigfi

Stolen 2 Line Transparent

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Data Sheet

The JE-16-A is a 1 :2 turns ratio (150/600 ohm) microphone input transformer for use with European type input circuits or the 990 operational amplifier. It handles levels to +8d8v Re: 0. 775v@ 20Hz ( 1% THO). Below saturation, the 20Hz TH D is less than 0.1 %. The bandwidth is 170kHz with no overshoot independent of the amplifier bandwidth. The JE-16-A has a multiple interleaved layer winding, similar to the JE-115K-E, for low leakage inductance. This yields wide bandwidth quite insensitive to load, low losses which affect noise in the upper spectrum, and very high frequency low Q resonance. A series RC network of 3600 ohms and 820pf should be connected across the 6200 ohm secondary load resistor for minimum transient distortion.

The series loss ratio referred to the secondary for 20kHz bandwidth is 1.45 ohm/ohm. This results in the transformer related noise figure of only 1.9dB. The 1 Ok Hz secondary source impedance is only 5% higher than that at 1 kHz, so the noise spectrum is very close to a pure resistance. The 20kHz equivalent input noise is - 128.SdBv Re: O. 775v when used with the 990 operational ampl ifier (0.8 nv/ rt Hz per xstr & 1.0 pa/rt Hz).

The input impedance is higher and f latter than the higher ratio types, yielding good regulation of frequency response characteristics with various source impedances.

JE- 16- A

1!",0/600 VEL I ~:· I I ORN I

L - _I CN 820pl

BLK

WHT

JE-16-A MICROPHONE

INPUT TRANSFORMER

2 uS AMPLIF IER

R3 • R1 fo, AVCL min • 2 !6d81

SCHEMATIC DIAGRAM OF TYPICAL TRANSFORMER APPLICATION

A2 A1 199 lo, AvcL =•• 100 140dBI

C1• 2 uS I R1 c2• 64mSIA2

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REGARDING THE OSCILLOSCOPE PHOTOS Actual oscilloscope photos were made from a Tektronix Model 453A {certified calibration).

Left column is transformer with secondary termination network and right column includes a 2 microsecond ampli tier.

2kHz Square Wave

50µ S/division

5µS/division

1 µ$/division



All curves were generated by a Hewlett-Packard 9815A/ 9862A programmable calculator/ p lotter. All calcu lations were either derived from or verified by actual measurements. Verified accuracies are on the order of one pen-line width.

DISTORTION

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GENERAL CHARACTERISTICS

Turns Ratio 1:2

Impedance Rat io 150/600

Primary Source Impedance 150 ohms

Secondary Load Res is tor 6200 ohms

Secondary RC Network RN % 3600 ohms CN " 820pf

Faraday Shield Separate lead

Magnetic Shield 30d8. separate case lead

Maximum Input Level at 20Hz t-9d8v (Re: 0.775v)

PHYSICAL CHARACTERISTICS

Package Mu-metal can

Termination Wire leads

Dimensions 1-5/ 16" diameter, 1-9/16" high

Mounting 2 holes, 0.7" cente,-to·center, self-tapping screws or clamp

TYPICAL PERFORMANCE

Voltage Gain 5.6d8

Input Impedance 1500 ohms@ 1 kHz 1340 ohms@ 1 Ok Hz

Secondary Source Impedance 830 ohms@ 1 kHz 872 ohms@ 10kHz

Total Harmonic Distortion (Below Sat uration) 0.10% maximum@ 20Hz 0.06% maximum@ 30Hz 0.028% maximum@ 50Hz 0.003%@ 1 kHz

Input Level @ 1% Saturation (dBv Re: 0.775v) +8dB11 @20Hz +12dBv@30Hz +17dBv@ 50Hz

Common-Mode Voltage (maximum) > 200v peak

Common-Mode Rejection Ratio > 85dB@ 1 kHz > 65d8@ 10Khz,

Transformer Noise Figure• 1.9d8 Re; 134.9 ohms··

(TRANSFORMER WITH SECONDARY TERMINATION ONLY)

Frequency Response (Re: l k Hz) - 0 .1 dB@ 20Hz - 0.03d8 @ 20kHz

(No resonance peak) Bandwidth

170kHz@ - 3d8 Phase Response

- 19° @20kHz Rise Time

2.2µ5 (10%-90%) Overshoot

< 1%

(INCLUDING 2µ S AMPLIF IER)

Frequency Response (Re: 1 kHz) - 0.ldB @20Hz -0.3d8 @ 20kHz

( No resonance peak) Bandwidth

75kHz@ - 3dB Phase Response

- 33° @ 20kHz Rise Time

4 ,9µ5 (10%-90%) Overshoot

< 1%

•Add to amplifier NF referred w impedance of 760 ohms, (Parallel value of secondary source impedance and load)

• •Parallel vtJlue of source impedance and input impedance.

Mounting Holes Clearance for =4 screw

Lead Holes Use 0.35" hole 10 clea, 9romme1

1617 NORTH FULLER AVENUE HOLLYWOOD, CALIFORNIA 90046

PHONE: (213) 876-0059

(Visitors by Appoinrment OolyJ



Data Sheet

The JE-13K7-A is a 1: 5 turns ratio ( 150/3750 ohm) microphone input transformer for use with European type input circui ts. It handles levels to +8dBv Re: 0. 775v @ 20Hz ( 1 % TH O}. Below saturation, the 20Hz THO is less than 0.1 %. The bandwidth is 1 OOkHz with no over· shoot independent of the amplifier bandwidth. The JE-13K7-A has a multiple in terleaved layer winding, similar to the JE-11 5K-E, for low leakage inductance. This yields wide bandwidth quite insensitive to load, low losses which affect noise in the upper spectrum, and very high frequency low O resonance. A series RC network of 15K ohms and 180pf should be connected across the 39K ohm secondary load resistor for minimum transient distortion.

The series loss ratio referred to the secondary for 20kHz bandwidth is 1.55 ohm/ohm. This results in the transformer related noise figure of only 2.3dB. The 1 OkHz secondary source impedance is only 4.9% higher than that at 1 kHz, so the noise spectrum is very close to a pure resistance. The 20kHz equivalent input noise is - 128.0dBv Re : 0. 775v when used with the NE5534A or the 918 operational ampl ifier (3.0 nv/rt Hz per xstr & 0.3 pa/rt Hz).

JE- 13K7 A

15013750 YEL I

ORN I

- _I BLK

WHT

JE-13K7-A MICROPHONE

INPUT TRANSFORMER

2uS AMPLIFIER

R3 • RI for AVCL mrn 2 l6d8)


Rz R1 /99 lo, AVCl m•• 100 140riBI

C1 2 uSI R1

Cz-64n,S1Rz

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REGARDING THE OSCILLOSCOPE PHOTOS Actual oscilloscope photos were made from a Tektronix Model 453A (certified calibration).

Left column is transformer with secondary termination network and right column includes a 2 microsecond amplifier.

2kHz Square Wave

SOµS/division

SµS/division

1 µ$/division


A ll curves were generated by a Hewlett-Packard 9815A/9862A programmable calculator/ plotter. All calculations were either derived from or verified by actual measurements. Verified accuracies are on the order of one pen-line width.

DISTORTION

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GENERAL CHARACTERISTI CS

Turns Ratio 1 :5

Impedance Ratio 150/3750


Secondary Load Resistor 39K ohms

Secondary RC Network RN ~ 15K ohms CN ~ 180pl


Magnetic Shield 30d8. separate case lead

Maximum Input Level at 20Hz +9d8v (Re: 0.775v)


Package Mu•metal can


Dimensions 1-5/16" cliarneter, 1-9/16" high

Mounting 2 holes, 0.7" center-to-center, sell-tapping screws or clamp

TYPICAL PERFORMANCE

Voltage Gain 13.6d8

Input Impedance 1580 ohms@ 1 k Hz 1160 ohms@ l0kHz

Secondary Source Impedance 5550 ohms@ 1 kH z 5820 ohms@ l 0kHz

T otal Harmonic Distortion (Below Saturation) 0.10% maximum@ 20Hz 0.06% maximum@ 30Hz 0.028% maximum@ 50Hz 0.006%@ lkHz

Input Level @ 1% Saturation (dBv Re: 0.775v) +8d8v@20Hz +12dBv@30Hz +1 7dBv@ 50Hz


Common,Mode Rejection Ratio > 85d8@ lkHz > 65d8@ l0kHz

Transformer Noise F igure' 2.3d8 Re: 132.8 ohms ..

(TRANSFORMER WIT H SECONDARY TERMINATION ONLY

Frequency Response (Re: 1kHz) - 0.1d8@20Hz +0.02d8@ 20kHz


100kHz@ - 3118 Phase Response

- 18° @20kHz Rise T ime

3.4µS (10%-90%) Overshoot

5%

( INCLUDING 2 µ S AMPLIFIER)

F requency Respon.se (Re: lkHz) 0.1d8@ 20Hz

- 0.25dB @ 20kHz. (No resonance peak)

Bandwidth 68kHz@ 3d8

Phase Response - 32° @20kHz

Rise T ime BµS (10%-90%)

Overshoot < 1%

• A dd to omplif,er NF referred ro impedance of 4950 ohms. (Parallel value o f secondary source impedance and load}

• "Parallel value of source impedance and inpur impedance.

r--- 1-5 / 16'' 7

r 1-9 / 16"

l_ Mounting Holes

Clearance fo, ;;,4 screw Lead Holes

Use 0.35" hole to clear grommel

1617 NORTH FUL LER AVENUE

HOLLYWOOD, CAL IFORNI A 90046 PHONE (213) 876,0059

(Visicor5 by Appo,ntmonc Only)


Data Sheet

The JE-115K-E is a microphone input transformer with extremely low leakage inductance. The step response exhibi ts less than 1 % overshoot with the secondary loaded in 10 times its characteristic impedance requiring no RC resonance damping network when used with an amplifier which incorporates 2µS phase lead compensation in its feedback circuit.

2µS AMPLIFIER

The response characteristic of the JE-115K-E is a speci fic underdamped 2 pole low pass which, when combined with a 2µS single pole low pass amplifier, results very close to a critically damped 3 pole. This response shape defines zero transient distortion. The 2µ S figure is determined from the Bode plot of an amplifier with a gain bandwidth product of 10MHz operated at a closed loop gain of 100 (40d8). The 10MHz figure is determined from popular amplifier types used in audio microphone preamplifiers. The closed loop gain is derived from the usual application of a variable feedback gain control over a range ot 6-36d8. The 2µS figure determines a - 3d8 point at 80kHz to maintain a finite amount of feedback at all frequencies extending to the frequency of unity gain (open loop) for stability. The high frequency bandwidth of the t ransformer is 140kHz and with the 80kHz amplifier, the result is a 76kHz bandwidth without overshoot.

LOW FREQUENCY SATURATION

The rate of increase in distortion versus input level is specifically low; it could be stated as 10d8 per decade THO. This results in a noticeably more gradual overload characteristic. The maximum input level capability at 20Hz is - ldBv (Re: 0. 775v) for 4% THO (visable saturation) and - 7dBv (Re: 0.775v) for 1% THO.

INPUT IMPEDANCE

The input impedance, with the secondary terminated in 150K ohms, is 1400 ohms at mid-band frequencies, maintaining above 1000 ohms in the range of 26Hz to 14kHz.

LOSSES AFFECTING NOISE

The series loss ratio referred to the secondary for 20kHz bandwidth is 1.33 ohm/ohm. This results in the transformer related noise figure of only 1.5dB. The 1 Ok Hz secondary source impedance is only 2.1 % higher than that at 1 kHz, so the noise spectrum is very close to a pure resistance. The 20kHz equivalent input noise is - 129.1 dBv Re: 0. 775v when used with the NE5534A or the 918 operational amplifier (3.0 nv/rt Hz per xstr & 0.3 pa/rt Hz).

PHASE SHIFT

The phase response at 20kHz is typically on the order of - 5° (the 2µS ampl ifier exhibits -14° @20kHz).

JE- 115K - E

1501151( VEL I

JE-115K-E MICROPHONE

INPUT TRANSFORMER

2 uS AMPLIFIER

----+-- ------------ ----- -;

I - BLK

WHT

SCHEMA TIC DIAGRAM OF TYPICAL TRANSFORMER APPLICATION

R1 for AVCL """ • 2 (6d8J

R2 R1/99 lo, AVCL ma• • 100 l40t!BI

c 1 2 uS I R1 c2 64mSIA

2




Left column is transformer with secondary termination network and right column includes a 2 microsecond ampl ifier.

2kHz Square Wave

50µS/division

5µ $ /division

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Al l curves were generated by a Hewlett-Packard 9815A/9862A programmable calculator/ plotter. All calculations were either derived from or verified by actual measurements. Verified accuracies are on the order of one pen-line width .

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Turns Ratio 1 10

Impedance Ratio 150/15K



Secondary RC Network None Required


Magnetio Shield 30dB. separate case lead

Ma><imum Input Level at 20Hz - tdBv (Re: 0.775vl


Package Mu,metal can


Dimensions 1-118" diameter, 1-1/16" h ogh

Mounting 2 holes, 0.7" center-to-center. sell-tapping screws supplied

TYPICAL PERFORMANCE

V oltage Gain 19.7d8

Input Impedance 1350 ohms@ lkHz 1150 ohms @ 1 Ok Hz

Secondary Source Impedance 19.6K ohms@ 1 kHz 19.9K ohms @ 10kHz

Total Harmonic D istortion (Below Saturation) 0.31% maximum @20H.z 0.17% ma><lmum@ 30Hz 0.082% ma><imum @ 50Hz 0.01%@ l k Hz

Input Level @ 1% Saturat ion (dBv Re: 0. 775v) - 7dBv@ 20Hz - 1.SdBv@ 30Hz +5dBv@ 50Hz


Common-Mode Rejection Ratio > 85dB@ 1 kHz > 65dB @ 1 Ok Hz

Transformer Noise F igure• 1.5dB Re: 133 ohms• •

(T RANSFORMER WITH SECONDARY TERMINATION ONLY) Frequency Response (Re: 1kHz)

- 0.SdB @ 20Hz +0.1 dB @ 20kHz +0 .2d8 @ 55kHz (peak)

Bandwidth 140kHz@ - 3d8

Phase Response - 5" @ 20kHz

Rise Time 2.5µS (10%-90%1

Overshoot 6.6%

(INCLUDING 2,uS AMPLIFI ER)

Frequency Response (Re: l kHz) - 0.5d8@ 20Hz - 0.2d8 @ 20kHz


76kHz @ - 3d8 Phase Response

19° @ 20kHz Rise Time


< 1%

•A dd co amplifier N F referrecr to ,mpeoance of 1 l.6K ohms. (Parallel value of secondary source impedance and load}

• •Parallel value of source impedance and input impedance.

0 .7"

0

0

~ 0.7''

Mounting Holes Clearance for 4 4 screw

Lead Holes Use 0.35" hole to clear grommet


PHONE (213 , 876-0059

(Visicors by Appointment Only/


Data Sheet

The JE-11 OK-C is a wire lead type 150/ 1 OK of earlier design than the JE-115K-E. The winding is a less complex configuration of interleaved layers exhibiting higher leakage inductance, so a series RC network of 56K ohms and 62pf should be connected across the 1 OOK ohm secondary load resistor for minimum transient distortion. The resulting high frequency performance of this type is close to the more complex winding but at lower cost. The total turns and core size are similar to the JE-11 5K-E yielding similar low frequency maximum level capability and distortion. The higher series leakage inductance yields a 2.0dB noise figure compared to the 1.5d8 noise figure of the JE-115K-E.

JE- 1 lOK- C

150/l0K ORN I

JE-110K-C MICROPHONE

INPUT TRANSFORMER

2 uS AMPLIFIER

o---+¾o • ____ ....,. __________________ _

~ RL • 100K RN • 56K

I VEL I

L _ - _I BLK

WHT


R3~ R1 lot AVCL rmn • 216dBI

R2• R1/99 lo, AVCl ma, • 100 (40dBI

c, • 2 us/R, t 2•64mSIR2



REGARDING THE OSCILLOSCOPE PHOTOS Actual oscilloscope photos were made from a Tektronix Model 453A (certified calibration}.


2kHz Square Wave

50µ$/division

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Turns Ratio 1:8.16

Impedance Ratio 150/ 10K


Secondary Load Resistor l00K ohms

Secondary RC Network RN = 56K ohms CN 2 62pr


Magnetic Sh1eld 30dB, separate case lead

Maximum Input l evel at 20Hz - 1dBv (Re: 0.775v)


Package Mu-metal ca11


D imensions 1· 1 /8 " diameter , 1-1 / 16" high

Mounting 2 ho les, 0. 7" cente1 •to•centeI , se lf -tapping screws suppl,ed

TYPICAL PERFORMANCE

Voltage Gain 17.9dB

Input Impedance 1400 ohms @ 1 kHz 1250 ohms @l 1 Ok Hz

Secondary Source Impedance 13.SK ohms @ 1 kHz 14 7K ohms @ 1 Ok Hz

Total Harmonic D istonion (Below Saturation) 0.19% maximun, @ 20Hz 0.11% maximum @ 30Hz 0.048% maximum @ 50Hz 0.008%@ l kHz

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> 200v peak Common-Mode Rejection Ratio

> 85dB @ 1kHz > 65dB @l 10kHz

Transformer Noise Figure• 2.0dB Re: 134.9 ohms· ·

fTRANSFORMER WITH SECONDARY TERMINATION ONLY

F requency Response (Re: 1kHz) - 0.4dB @ 20Hz +0.1dB @20kHz ~0.25dB @ 50kHz (peak)

Bandwidth 118kHz @-3dB

Phase Response - 13° @20kHz

Rise T ime 3µS (10%-90%)

Overshoot 8%

(INCLUDING 2µS AMPLIFIER!

Frequency Response (Re: 1 kHz) - 0.4dB @ 20Hz - 0.2dB @ 20kHz


75kHz @ - 3dB Phase Response

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PHONE (213) 876-0059

(Visirors by Appomrmenc Only)

wigfi




Data Sheet

The JE-11 OK-HPC is a printed circuit type 150/ 1 OK with a winding similar to t he JE-115K-E. The multiple interleaved layer winding exhibits very low leakage induct ance requiring no series RC network across the 1 OOK ohm secondary load resistor when used with an amplifier incorporating 2µ S phase lead compensation in the feedback circui t . Since the PC bobbin contains a smaller stack of laminations than the wire lead JE-115K-E. the JE-11 OK-HPC uses more total turns of smaller wire. The result is higher maximum level capability at low frequencies and the distortion is the lowest of all types in this size (0.11 %@ 20Hz), but the higher series losses increase the noise by 0.9dB, compared to the wire lead version JE-115K-E.

The pin pattern is compatible with the JE-611 0K-APC.

JE- 110K- HPC

5

I s I

_ I 6

JE-110K-HPC MICROPHONE

INPUT TRANSFORMER

2 uS AMPLI FIER


R3 R1 fo, AVCL m,n • 2 (6d8I

R2• R1199 lo, AvCL mu 100140d81

C1 2uS I R1 C2• 64mS/R2



REGARDING THE OSCI LLOSCOPE PHOTOS Actual oscilloscope photos were made from a Tektronix Model 453A (certified calibration).


2kHz Square Wave

•••• . ■■■■■■ ■■■■■■

50µ S/division

5µ S/division

1 µS/division



All curves were generated by a Hewlett-Packard 9815A/ 9862A programmable calculator/ plotter. A ll calculations were either derived from or verified by actual measurements. Verified accuracies are on the order of one pen-line width.

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FREQUENCY RESPONSE

A r---t-r-t-'rT-H-"Ti'H-H+-:-:--:-;+.-:'-:trl-::-1-:ri:+-f'++-t+t-'-~---..-f-t-++:+-i~H-!+..-:-f---flJH!--,Jd::,Y---l++r-l,-l-l+I 1£1 e ~=t=::;::::!==;;l:=t++t+Ht- t-H+m+::+++tt-7--t-,--i-M--i-R=l~:3-..-Jttif.f -- -,V--H

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A

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:200

:200

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PHASE RESPONSE

2K

FREQUENCY <HZ>

-:a

-1121

:21211<:: :2001<::

121

-~

10111

I~

:as:121

20K :201211<::




Tulns Ratio 1 :8.16

Impedance Ratio 150/ l0K



Secondary RC Network None required

Faraday Shield Separate p in

Magnetic Shield 30dB, separate case pin

Maximum Input Level at 20Hz - l dBv (Re: 0.775vl



Termination PC p,ns

Dimensions 1-1 /8" diameter, 1-1 / 16'' high

TYPICAL PERFORMANCE

Vol tage Gain 17 .8dB

Input Impedance 1400 ohms@ lkHz 1300 ohms @ 10kHz

Secondary Source Impedance 15.2K ohms @ l kHz 16.1 K ohms@ 10k Hz

Total Harmonic Distortion (Below Saturation) 0.11 % maximum@ 20Hz 0.06% maximum@ 30Hz 0.025% maximum @ 50Hz 0.0042%@ 1 k Hz

Input Level@ 1% Saturation (dBv Re: 0.775v) - 4dBv @20Hz 1-0.5dBv @ 30Hz +6dBv @ 50Hz


Common-Mode Rejection Rat io > 85dB @ 1 kHz > 65dB @ 10kHz

Transformer Noise Figure• 2.4dB Re: 134.5 ohms··

(TRANSFORMER WI TH SECONDARY TERM INATION ONLY)

Frequency Response (Re: l k Hz) - 0 .2dB@ 20Hz +0.1 dB @ 20kHz +0.9dB@ 80kHz (peak)

Bandwidth 158kHz@ - 3dB

Phase Response 7.5'' @ 20kHz

Rise Time 2.2µS (10%-90%)

Overshoot 13,3%

(INCLUDING 2µS AMPL IFIER)

F requency Response (Re: 1 k Hz - 0.2d8 @ 20Hz - 0.2dB @ 20kHz

(No ,esonance peak) Bandwidth

92kHz @ - JdB Phase Res..ronse

- 2 1.5 @ 20kHz Rise Time

3.9µS (10%-90%1 Overshoot

< 1%

·Add co amplifier NF referred to impedance of 13.BK ohms. (Parallel value of secondarv source impedance and load)


Part No. Printed On Case Between Pins 4 & 5

. 4 __L_ e J 0,15 ..

• 2 -r (Hole Req'd 0.040")

• 1

r--1· 1/8"

T 1 ·1116"

s e 6 •

1 e s•

l ....._____.

1617 NORTH FULLER AVENUE HOLLY WOOD , CALIFORNIA 90046

PHONE 12131 876-0069

(Visitors bv Appointment On/VJ



Data Sheet JE-61101<-APC

The JE-611 OK-APC is a printed circuit type 600/ 150- 1 OK of earlier design than the JE-11 OK-HPC. The winding is a less complex configuration of interleaved layers exhibiting higher leakage inductance, so a series RC network of 27 K ohms and 110pf should be connected across the 100K ohm secondary load resistor for minimum transient distortion. The resulting high frequency performance of this type is close to the more complex winding but at lower cost. Also the total turns is lower than the JE-110K-HPC. This means t he low frequency maximum level capability is less and the distortion is higher, but the lower ser ies losses yield the same 1.5dB noise figure as the wire lead version JE-115K-E.

The pin pattern is compatible with the JE-110K-HPC.

JE 61 10K - APC

600/150- 10K 5

I

s I

_J 6

MICROPHONE INPUT

TRANSFORMER

2 uS AMPLI FIER

R3 R 1 lor AvcL m," 2 16<181

SCHEMATIC DIAGRAM OF T YPICAL TRANSFORMER APPLICATION

R2 R /99 fo, AvCL m•• • 100 140dBI

c 1• 2 uSI R1 Cz 64mS/R2

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l eft column is transformer with secondary termination network and right column includes a 2 microsecond amplifier.

2kHz Square Wave

50µS/division

5µS/division

1 µ S/division



All curves were generated by a Hewlett-Packard 981 5A/ 9862A programmable calculator/ plotter. A ll calcu lations were either derived from or verified by act ual measurements. Verified accuracies are on the order of one pen-line width.

DISTORTION

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4 I .I

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FREulUENCY <HZ >

SECONDARY SOURCE IMPEDANCE 8

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12K

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2121121 2K 20K

FREulUENCY <HZ>



FREQUENCY RESPONSE

+2

A l----f-+-+-i~t4-!+44..J-+f-L!..!..+~-l-~l-i-4~::.J.:++Hf..-!--;+-.:.;.+-,..:+-,+.++4-+-!+-..:.+--+;;+:;~~_._,;;-1+i-;+-1-l + I

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w lfl a: :r a..

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20 211llll

2K

FREQUENCY <HZ>

PHASE RESPONSE

2K

FREQUENCY < HZ> 2111K

-1111

211llllK

2~

211llllK




Turns Ratio 2/1:8.16

Impedance Rat io 600/ 150: l0K

Primary Source Impedance 150 ohms (paral lel pr,ma, 1es)

Secondary Load Resistor I00K ohms

Secondary RC Network RN ~ 27K ohms CN = 110pf

Faraday Shield Separate pin

Magnetic Shield 30dB, separate case pin

Maximum Input Level at 20Hz - 6dBv (Re: 0.775v)



Termination PC pins

Dime nsions 1-1 /8" diameter, 1-1 / 16" h igh

TYPICAL PERFORMANCE (150/ 10Kl

Voltage Gain 18dB

Input Impedance 1240 ohms@ 1 kHz 920 ohms@ 1 Ok Hz

Secondary Source Impedance 12.3K ohms@ 1 kHz 13K ohms@ l0kHz

To tal Harmonic Dis1ortion (Below Saturation) 0.26% maximum @ 20Hz 0.14% maximum @ 30Hz 0.065% maximum@ 50Hz 0.G13% @1kHz

Input Level @ 1% Saturation (dBv Re: 0.775v) l0dBv@ 20Hz

-4.SdBv@ 30Hz + ldBv @ S0Hz

Common-Mode Vol tage (mai<imuml > 200v peak

Common-Mode Rejection Rat io > 85dB@ I kHz > 65dB @ 1 Ok Hz

Transformer Noise F igure• 1.SdB Re: 129.5 ohms' •

(TRANSFORMER WITH SECONDARY TERMINATION ONLY

Frequency Response ( Re: 1 kHz) - 0.6dB @ 20Hz ~0 .05d8@ 20kHz (No Resonance peak)

Bandwidth 90k.Hz@ - 3d8

Phase Response 15~ @20kHz

Rise Time 3,8µ5 (10%~90%)

Overshoot 3%

( INCLUDING 2µ S AMPLIFIER)

Frequency Response (Re: lkHz) - 0.6d8 @ 20Hz

0.25dB @ 20kHz (No resonance peak)

Bandwidth 60kHz @-3d8

Phase Response - 29"@ 20kHz

Rise T ime 5.GµS (10%-90%)

Overshoot < 1%

• Add co amplifier N F referred to impedance of I 1.3K ohms. (Parallel valuP. of secondary source impedance and load)

• 'Par,11/el value of source impedance and input impedance.

Part No. Printed On Case Between Pins 4 & 5

. 4 ......L .3 0.15"

-r • 2 (Hole Req' d 0.040")

• 1

s e s e 1 e s•

r--1-1/8"--j

r 1-1/ 16"

L ~ I I

1617 NORTH FULLER AVENUE HOLLYWOOD, CALI FON RIA 90046

PHONE (213) 876-0059

(Visitors by Appoinrmanr Only/



Data Sheet

The JE-110K-F is a very miniature printed circuit board type 150/ 1 OK. The size is 0. 73" square by 1.1" high with 8 PC pins and a mu-metal case. The package is a unique Reichenbach design which maximizes core area for package volume. This yields very good performance including high level capability for its size. However, the additional hand craftsmanship required for the small size, increases the cost of the JE-110K-F above his bigger brothers.

The pin pattern is unique, necessitated by the space occupied by the core.

JE- 110K- F

5

I I

s I

_I 7

RL 1001(

JE-110K-F MICROPHONE

INPUT TRANSFORMER

[J

... ... ~ I ..,

2 uS AMPLIFIER


R3 • R1 lor AVCL m+n • 2I6dB}

R2• R1/99fo, AvcL m•• • 100I40d8I

c1 2 uSIR1 C2•64mSIR2

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REGARDING THE OSCILLOSCOPE PHOTOS Actual oscilloscope photos were made from a Tektronix Model 453A (certified cal ibration).

Left column is t ransformer w ith secondary termination network and right column includes a 2 microsecond amplifier.

2kHz Square Wave

SOµS/division

SµS /divis ion

1 µ$/division



-

All curves were generated by a Hewlett-Packard 9815A/ 9862A programmable calcu lator/ plotter. All calculations were either derived from or verified by actual measurements. Verified accuracies are on the order of one pen-line width.

DISTORTION

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2111K

FREGJUENCY <HZ>

SECONDARYSOURCEIMPEDANCE 8

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~ =~ ·:!:: ·· , . .,., __ . ..... 1-•1-t-H -- t'"+t,1 •t·-t-~ ,i H:.1 enw :~ 7K r--rr~-t. ......;; . ~ +- .... ·• 1 l....,;,..;.!--=-ft--"""':: '"' ~!.:-'!'f-7""" ... f-.z ~ tf; 1" ¼ 7K •• ·t a_· 1 • ; i . . . . .· . ~ . ;_ 'i • ~ . • A z 6" !----'--;-f. t--,--, .-+IH1- ,H,-;-. .,..;!4---. '-~--4-...:;_....µ~~, ...,_ ,+-'-'' ·c.....:..-i---:-~. ,-l_ -'-. - , '--e.--i-;l:_.~....:.. • ..;_ ..:.., __:,.L...!.--'-'-_I A en SK •. -·-1-· ·1-----•4:~--l--'-- .l~~-r~~ ~~ t~-... ~ N O SK - .~- '. .. t . ! . . ~ :.Li.r, .. µ ...... ,~ · :_lt _~--~-4-~--:- N W •• · . , ! · , - =ri . I~ .. _ 1 , • : - I C:. •• .L -, L . _ T. i: _ L . . 1 ' · . ,_ Hr= ~ .. t.~ 1 ~- ,. I

a: " ,.,, ., ~ "·T .. ; .• ,!.' t.·. ! ,1,1" : ··t ' V (/) - :1 -,1, Lf ·t •. lHi<'i 1' ·::: '/'Hi[; Httt' . V

> .~ ,· i·. • -· i ri _--~l ---f;Tff;' .__ ,_ >- w :t ~~i: :~. ~ r ~::H~::-~ ~--t·. i•rf :: ~!:11' >-

21<1.---i--..1-__;:.. -- ' ' - ·-·• .. r-- i'-- . ':,LV a: >K I__ ~r.,. ·~•I,' .. ,,-· ').. ... ':,LV (.) - . I '~. . - ;_1 __ _. N z t- l • I .. ' ... ' • ~f--, ... I N z z . ! " I i '., I. A z · W w I ·,., A . ,L. - :.•-• W w i'._, . . 1 •. - _ :J _1 ' I· ;T ,- . ·! · i' ··. : -.... . . [] '· _ :J

1 K ! : . I t . I It! }- , B en 1K I ! , . • h a' . 1. 1,1 r , , ! - B :::, 900 t°" t"'° P l • -:- t~ -· ' + _-t~t . n. , "f'- .Jj\ l ---~, W <t 900 :+~ _ _ J f ~t >T 7" d ~- ~ _· · ~ ., ~ '. n_ r-- :J . -~t -~;.. W

0 800 • , ' I I , Z [r- -- ' £r 800 ~r~ +-' . . ~ ll - +r----z -+ft ~ • lJ'. W : + ,...r..., ..__ · l : -t • ~· · • I':] :r: -□ w u. ::C 100

:-1 i L r f- fr~ 1e1 □ iw T, - ' , L.

a: 500 -1--;-- -'-'--r'- ·. -·: - ~; bl -~..: ~ If lii: ~ ..,. CL U. •oo ~I ~=-~x rH·· ;,- l - 11 11 v w~ ...

300 ..... .,._ . - 1 • ·- . ........ i-.!- _ __:, , - 300 ~l . . .... ;· : r- > l n. .

. . ; • .c ~ • I _!- . !- l:il ~ ~ . ISi 200

'El •4t~~ti. I\ -J ", ]♦-'=!?- ~-] - !ti I I '~ !ft: g-=! I I ': 70

=1· :_ H; --tt· ~ I\ r -~--If:. ~_,__ rr.111~~- if s~--. w_ l!I .. : :~ ·1N .PT · I .. I . - -~ \ . - - I -- -- . - . •• ' . . . . . . ··i.

20 - 1- I . . • • . • . -t~-- s ] ;- ,JT J I f I t l 1 t 1 t ti IISI

<S~ > 73A37 ~nd~no 3Al~~73~ N < S33~~3~> 3S~Hd 3Al~~73~ N

- - -



Turns Ratio 1 :8.16

Impedance Ratio 160/ 10K

Prl mary Source Impedance 150 ohms


Secondary RC Network RN 2 33K ohms CN ; 100pf

Faraday Shield Separate pm

Magnetic Shield 30dB. separate case pin

MaKimum Input Level at 20Hz 3.5dBv (Re: 0.775v)


Package Miniature mu-metal can

Termination PC pins

D imensions o. 73'' x o. 73" x 1.1" high

TYPICAL PERFORMANCE

Voltage Gain 17.9dB

Input Impedance 1450 ohms @ lkHz 910 ohms@ 1 Ok Hz

Secondary Source Impedance I4.5K ohms @ 1 kHz 15.3K ohms@ 1 OkHz

Total Harmonic Distortion (Below Saturation! 0.2% maKimum@ 20Hz 0.11 % maximum @ 30Hz 0.05% max imum @ 50Hz 0.007% @1 kHz

Input Level@ 1% Saturation (dBv Re: 0.775vl - 11dBv@ 20Hz - 4.5dBv @ 30Hz +3.0dBv@ SOHz


Common-Mode. Rejection Ratio > 75dB @ 1 kHz > 55dB @ l OkHz

Transformer Noise Figure• 2.3dB Re: 128.6 ohms ..

(TRANSFORMER WITH SECONDARY TERMINATION ONLY)

Frequency Response (Re: lkHz) - 0.6dB @ 20Hz - 0.15dB@20kHz (No resonance peak)

Bandwidth 77kHz @ - 3dB

Phase Response - 20" @20kHz

Rise Time 4 .8µ$ (10%-90%)

Overshoot < 3%

(INCLUDING 2µS AMPLIFIER)

Frequency Response (Re: lkHz) - 0.6dB @ 20Hz - 0.4dB @20kHz


52kHz@ - 3dB Phase Response

- 34° @ 20kHz Rise Time


< 1%

•Add to amplifier NF referred co impedance of 12.9K ohms. (Parallel value of secondary source impedance and load)

• •Parallel value of source impedance and mpuc impedance.

No Pins 2 & 3

_L ., 4 • 0.25"

-r • 8 5 • 7 6 • •

0.58"~ IE--(Hole Req'd 0.040")

r-0.73"~

T 1 .1"

l~


PHONE (2131 876,0059

(Visitors by Appointment Only/


•

Data Sheet

The J E-1 1 P-9 is a 1: 1 turns ratio line input transformer for high input impedance circuits (6K ohms and higher). It handles levels to +27d 8v. Re: 0.7 75v@ 20Hz. Below saturation, the 20Hz THO is less than 0.025%. The high grade Nickel alloy core yields very low distortion even with source impedances up to several thousand ohms.

The bandwidth is 52k Hz with < 3% overshoot . The series losses are equivalent to 1470 ohms, so the level loss will be the same as a voltage divider made wi th a 1470 ohm series resistor and a shunt resistor equal to the load connected to the secondary. For 15K ohm load, an RC network of 7500 ohms and 1000pF is required to damp the resonance. If the load is 100 K or higher, an RC network of 5600 ohms and 1500pF is required. For other loads such as input circuits with shunt capacitance, our computer can derive optimum RC network values to minimize transient distortion and maximize bandwidth and generate revised response and impedance resul ts.

The standard package has wire leads. Octal plug versions are available for all popular pin con· nections with or without the RC network built-in.

JE-11P-9

" r,:j I .... :ti I a,

,- - - - - - - - - - - - - - - - - - - -I 1n

JE-11P-9 LINE INPUT

TRANSFORMER

I RED _____ Y_L'-W---~------- TO AMPLIFIER I INPUT

I I I I BRN

I I I ---------

(1) AL ~ 15K ohm

RN c 7500 ohm

CN • 1000 pf

ORG

BLK

WHT

(2) AL - 2 .2M ohm

AN • 5600 ohm

CN • 150 0pf




This column with 15kf2Ioad. This column with no load. 2kHz Square Wave

50µS/division

5µS/divisi on

1 µS/division



The response and impedance curves were generated by a Hewlett/ Packard System 45 Desktop Computer and a 9872A Plotter. The curves are the calculated results from an equivalent circuit model using the H/P AC Circuit Analysis program. T his method has made it possible to display the impedance curves up to 200k Hz showing the secondary resonance and RC network damping effect. Measured data from many prototypes were used to derive the model to represent the average performance.

T he distortion curves were generated by a Hewlett/Packard 9815A/ 9862A programmable calculator/ plotter with a polynominal curve fit program. The distortion measurements employed a Sound Technology 171 OA Analyzer. Ver if ied accuracies are on the order of one pen line width.

DISTORTION , _. Ill r=:::::p:::z:p=::::::::::;:::i::=:::;::::::::,'.+::=~:::::,::=::::::i===+;:::::------:::r;::-;:ii==:=t • • l-.-..-+--+----+--t----'-;:---+-~-;-:---,t-----;-----------1-----,

··-

l==It:t::=t=~~l:=i~!:1.ti~ ==11==~$.~~::::==t=t1 :r h--'-f--,-+--+-==---1-------t-'--+--+-t-f---.+~-+--'-'-'+.;..c-'-1,..,.-;--.....+-t-=-A J]

:0 _ .......,. ______ .,.....,__-+-~-+---~~-+-------.----1t--f+-'-4H :I

□ 1~-4..,...,....-'+----'----r--t---:--,-+--,--4--+,---'--i-,-,----+.,-:--t-"--,"--'+-----i,-,-,,f+~ Z

h--=+~..::+:~~~r---=--,--,---,'-=:--:,-~...,..;...-1-:--_..;.;:f----4.;..;....-f-----''E--'-l._f-+--+-1 (',

0

~=~t==±==3~~jt::=2==t==l~::E::::::e::::tS:~±E:::Li-=-::L:i:Jr_=+I~ ~ l-----+---+'~-+-....::....+-,-.;..;..+--+.,---'+---'--f--'-+--'--1-----"--+--'-lrr---+lf-l □ t--------+"""""',--+-'--'---,f--------'------+'---~---------"---+----'---+-----"--tf- ---tf---'--l :0 1----.;;..;;....;.--1-_,.......;---'-,-,f--"---r--+--:-r-~....-l'-,--....:C,---,-,+:,......,.. .......... -J- -l--...,......,..j -i

□ 1-----------+------+-t-f-------------t-'---'-,-~--,---------,-.._,- - -t--;+-f z

mmt.___,, _ _.__.....__.._ _ _ _.__.....__.__ __ _.__.....___....____,._____. - YB - 3B -2111 - l e B + IB +2e +3B

INP UT LEVEL <~BV RE.77~V>

wigfi




A

I: :t □ V

w V z er 0 w Q. I:

A

I: I □ V

w V z a: 0 w Q. I:

w V a: :J □ 111 •

INPUT IMPEDANCE

<HZ>


21211!1 2K

F"REGIUENCY <HZ> 2111K

. IBK

I S::lc:

121c:

9K

Eilc:

3K

21!11!1K

QIC

6K

'-lie:

2K



-

FREQUENCY RESPONSE

,.._ 1........_:---!--1,-1-+--1,...1...:~--1-+-l-l---4-+f-4--+-+-~.::.+1-1---1-+-,...;.....;~-1,-J-+--+-,,+---+--J...+-l-l--t-+-+-+++-+-+-++H-1 + I

tD 0 i--.--t-rrrrn-H-tt-7T1-t-r-H-i-t-i-tt---.-t-H-""i"'9"=!::!::±::H--v

111

- s w > 1--t---±-t---+t..J4 -~(--~rt--.:=,--'9--.Cl11 -i-.il:l1Cll--l+-l--l-+-____..--'+'-+-+'+---!--'--1•"4-'4--l-l+'~~_..,.-1-4--1-41+-4-1f-+H -7

la: ...J

-a w II µ....:+;-+-l-1--4---4-4-+-J.++-.:.....+-.fl~--h-~-1-t++-l-,--P+-H-++-+-+-++++-.:..;.;+~g.;_++f-t-l\l+++H ~

" lJ1 w w II l!J w 0 V

w -+ lJ1 a: I n.

w > -I-II ...J w II

211.111.1

212111!

2K

FREG:IUENCY < HZ >

PHASE RESPONSE

2K FREG:IUENCY <HZ>

-1 111

2'i!IK 2'i!lli!IK

111

- gt

lli!lli!I

I S:li!I

2ZIZI

2gf

2111K 211111!K



JE-11P·9 GENERAL CHARACTERISTICS

Turns Ratio 1; 1

Impedance Ratio ( 15K/ 15K)

Primary Source Impedance 600 ohms or less

Secondary Load Resistor Secondary RC Network

15K ohms 2.2Meg ohms 7500 ohms, 1000pF 5600 ohms, 1500pF (most plug-in types have RC net bu11t-in)

Faraday Shield Separate Lead

Magnetic Shield 30dB, separate case lead

Maximum Input Level at 20Hz +27d8v (Re: O. 775v)


Package Mu-metal can (standard) or octal plug

Termination Wire Leads (standardl Octal plug types also avai lable

Dimensions 1-5/16" draminer. 1-9/16" high (Slandard) 1 •5116" diameter. 2" high (octal plug)

Mounting (standardl 2 holes, 0.7'' center-to-center/self-trapping screws or clamp

TYPICAL PERFORMANCE

Voltage Gain Input Impedance @ 1 kHz

@ 10kHz Frequency Response@ 20Hz (Re: 1kHz) @ 20kHz Bandwidth @ -3d8 Phase Response @ 20kHz Rise Time ( 10%-90%) Overshoot Secondary Source Impedance

2070 ohms@ l kHz 2360 ohms@ 10kHz

With 15K load

- 0.82dB 15.8K ohm 7850 ohms - 0.03d8 -0.3d8 52kHz - 27.5 deg 6.2µS < 3%

Total Harmonic Distortion (Below Saturation) 0.025% @ 20Hz 0.015%@ 30Hz 0.008%@ 50Hz

Input Level @ 1% Saturation (dB11 Re: 0.775v) +26dBv@ 20Hz +29d8v@ 30Hz +35d8v @ 50Hz

Common-Mode Vol tage (maximum) > 200v peak

Common-Mode Rejection Ratio > 75d8@ 1kHZ > 55dB @ 10kHz

With 2.2Meg load

- 0.03d8 67K ohm 7470 ohms - 0.03dB - 0 ,6d8 58k Hz - 29 deg 6.6µS < 1%

1617 NORTH FULLER AVENUE HOLL YWOOO, CALIFORNIA 90046

PHONE (213) 876-0059

(Visirors by Appoincmen t 011/y)

Mounting Holes Clearance for # 4 screw


T7 1 15/16"

~ -

2"

\ I

----



Data Sheet

The JE-11 SSP-SM is a 600/150 -600/150 ohm (split winding) line input transformer for low input impedance circuits. It handles levels to +23dBv. Re: 0. 775v@ 20Hz. Below saturation, the 20Hz THD is less than 0.035%. The high grade Nickel alloy core yields very low distortion even with source impedances up to several hundred ohms. The bandwidth is 120kHz with <3% overshoot.

The standard package has solder terminals. An 11 pin octal-type plug version is available.

JE-11SSP-8M

JE-11SSP-8M LINE INPUT

TRANSFORMER

,-- --- ----- -------- --' 600/150 - 600/150 I -----------'---0-------,._-➔ TO AMPLIFIER

INPUT

I I '- - - - - - - - - - - --- ---------'




2kHz Square Wave

50µS/division

5µS/division

1µS/division

wigfi




All curves were generated by a Hewlett-Packard 9815A/9862A programmable calculator/ plotter.

A l l calculations were either derived from or verif ied by actual measurements. The distortion curves were generated by a polynominal curve fit program using measurements by a Sound Technology 171 OA analyzer. Verified accuracies are on t he order of one pen line width.

DISTORTION

't2 : E;.~;t:.:.:.1-:.:.~~:.:.:.~~:.:.~~:.:.:.~:.:.;i:.:.:.f:.~:.t:.:.~1:.:.;' ~:.:.:.~S;i~~:~.~ 7 ___ t- -h • I t I A ~

L

Li •-- - ~-+-f- l-j . -~ t--. -~ : i ·-! i "..1 r r ~ • -4-

•- __ ~i~ · ,c=;c,i-'-' F &c,p= r -~~·E-,-''F"=~rµ'

,

..

-+4 t - t. · rr-- · · f. !-r++tl+etl- .... - - 't- t +t +H H 1..

- :i-m'

- --,;,

-"" -

1

"' . !

lfF : ~ -r-H· •- t ➔-

~ 7'

,_

-· 1 ...; ' a- +

~ Ft t Jrtt It~,

.... + .........

' -' -

.......

/

r /

l 1 . r- :-, ....

. ' I

-'- ,·1 .. r -- - i~ I

' I ,-

1 j

i-:,- ..,...

. -~: t~ _'1 ll ~: mm,,._ ___ ..__ ___ ...... ___ _._ ___ ...., ___ ...., _______ _

-f □ -f lJ r

(\ IT1 z -f V

-'-!RI -321 - 2Z -1 21 21 + 121 +221 +321 I NPUT LEVEL <CBV RE. 77S V>



INPUT IMPEDANCE

121!11!1

A

I: I IB5'11!1 D V

w V z It 0 w a.

6111111 I:

I-:J a. 'illllll

z

22llil 2K 21i!K FREQUENCY <HZ>


~ 1 .ID 1-+__:.+-.;.;.+....,+-+-+-11-t-+-+-+-!!-++............!~-+-,,;.~--;+::-1-H-1-++-i-+-:;..._;_+;-.+:---:-+-1-+:-H-l~++-H 12111111 V

wl-..L~~WUili!-__._:~~WJ.+.+.+--W--+- -h--=-1--'--hi-::-t-rTT V It .,__-i--+,--,-+--'-+--l+-l'-thl-+-+,..+-+++-----4---'-+--,--T"l--+-il-l--+-+-++-+-~---'+-+--+~l--+-'--+-++++,ggfllll :J a lJ1 l~-i-+t......+~rl-..l+Ht"'l--1-i-'"'f!Hl-++.t+---;...;.+-,..H H"'"!-t--i-+=t--,t-+--t++ttt....-t+-t-t--+----rl--'---t+--+4+" 1.,;.tt,++-it++<l f#

>- H-r-H--t---tt-+.-J~--1-t'--t-::±±±-'.-"'"'."-t:'""!'"'""--t.,.,.+-Hf-hr-+-'-+-'4-'++t--,---i+-+t-+~t-+-!-+-+-+++-l'-tlll

! ~gg;td11~~1~t~ft,±±~b::bh!:l:btdd:H_t_l:....=-3J: . ..:r:hrl±hi-rTD z D ~ ---+~-+---+-1-+--H--b.++H-~-+~---+-.Jet-H-t-r.+-+-+++--t+~~~+"+-H-+-+-++~a V w lI1 t-i-+-..-++l...-. P~f¥H:8'-I-

2111 221111 2K 2111K FREQUENCY <HZ>



A

ti] Ci V

..J w > w _J

w > l-a: _J w

FREQUENCY RESPONSE

-------+, D'. - ---t-,-+-H•-+, ,+,1-+--1---.... ~

2li!I

A

Ln w w D'. L!l w Ci V

w > II! ..J w D'.

2li!I

21!1121

2li!lli!I

2K

FREQUENCY <HZ >

PHASE RESPONSE

2K

FREQUENCY <HZ>

I

li!I

-I

-2

-7

- a

- s

- lli!I

- 11

.. I -12

2li!IK 2 IZIIZIK

- S:li!I

- 7S:

IIZIIZI

2 IZIIZIK



JE•11SSP-8M GENERAL CHARACTERISTICS

Turns Ratio 1 : 1

Impedance Ratio 600/ 150 - 600/ 150


Secondary Load Resistor 600 ohms

Faraday Shield Separate connection

Magnetic Shield JOdB, separate case connection

Maximum Input Level @ 20Hz +23dBv (Re: 0.775v)


Package Mu-metal can (standard) or octal type plug

Termination Terminals or 11 pin plug (octal type)

Dimensrons 1.5" >< 1. 75" x 2.5" high

Mounting Threaded inserrs

TYPICAL PERFORMANCE

Insertion Loss - 0.7d8

Input Impedance @ 1 kHz 701 ohms @ 10kHz 732 ohms

Secondary Source Impedance @ 1 kHz 701 ohms @ 101cHz 732 ohms

Frequency Response (Re: 1 k Hz) @ 20Hz - 0.03dB @ 20kHz OdB (reU

Bandwidth @ - 3dB 1201cHz

Phase R esponse @20kHz - 9 deg

Rise T ime (10%-90%) 2.SµS

Overshoot < 3%

Total Harmonic Distortion (Below Saturation) 0.035% @ 20Hz 0.018%@ 30Hz 0.008% @ S0Hz

Input Level@ 1% Saturation (dBv Re: 0.775vl +22dBv @ 20Hz +26dBv@ 30Hz +31dBv@50Hz


Common-Mode Rejection Ratio > 85dB@ 1 kHz > 65d8 @ 1 Ok Hz

16 17 NORTH FULLER AVENUE

HOLLYWOOD. CALI FORNI A 90046 PHONE (213) 876•0059

(Visitors by Appointment Only)

T 1, 1/ 2"

l ....___- - -___ - -llf'('---- , . 3/4" ____ ..,..~

2· 112"

r 1 · 1 / 2"

l --~ --------1

f~------ 1·3 /4" ----~

2-1 / 2"



Data Sheet

The J E-11 SSP-6M is a 600/150 -600/150 ohm (split winding) line input transformer for low input impedance circuits. It handles levels to +18d8v. Re: 0.775v @20Hz. Below saturation, the 20Hz THO is less than 0.035%. The high grade Nickel alloy core yields very low distortion even with source impedances up to several hundred ohms. The bandwidth is 160kHz with < 3.5% overshoot.

The standard package has wire leads. An 11 pin octal-type plug version is available. A terminal package version is planned, but was not yet released at the time of this printing. The same design is also available with a lower permeability Nickel core by omitting the suffix "M". This material yields 6d8 more maximum level, but must be used with source impedances of 100 ohms or less to maintain low distortion at low levels.

JE-11SSP-6M

600/150 - 600/ 160

JE-11SSP-6M

- --, I 1

LINE INPUT TRANSFORMER

BRN __________ G_R_N_....;.1 __ ,v.--------~ TO AMPLIFIER INPUT

I I

RED

ORG

VLW

,_ - - - --

BLU

VIOL RL • 600 OHM

GRV

BLK

________ I

WHT



REGARDING THE OSCI LLOSCOPE PHOTOS Actual oscilloscope photos were made with a Tektronix Model 453A (certified calibration).

2kHz Square Wave

50µS/division

5µS/division

lµS/division



All curves were generated by a Hewlett-Packard 9815A/9862A programmable calculator/ plotter.

All calculations were either derived from or ver ified by actual measurements. The distortion curves were generated by a polynominal curve fit program using measurements by a Sound Technology 1710A analyzer. Verified accuracies are on the order of one pen line width.

DISTORTION .J~ _ •--

l --

,_ __ _

. --L

111 - I . . . I -.. ..

. L

I :1 t +~ ' ' = C ; .;.

~t ,;.., ± ·,,_ - . "·· +: .+I \ 1 t ;

~, l ' ' j • . . .

•-.ti,. -~ -1--4 ~ +:± ; ; f- 1

t-EEI ba - - i-t • t '-· F . - .d

l$t:i:. l=r;_j__:f- • l~ ··-~ ·±

-:!ili Ftl..J .-=- -=\JF-- I i_c --~- I..Jr

im [a1 J - f-, -4- _J i,;. t w . " I-- , ., f -,+ ~.,.,., ,.,,. I t L 1 " -·--..,.....-:t;:..- . '-±4 ~ j: ·i;;; . l

. T =- ...... ~i_- ~,1_ .....,__r--.• -1 ➔ - ~ -... -· -~ . " ..I • J

clP >-9 ! , L::. H ,.+-i ~ i,~.,' • -~ FJ-.ai:£ " 'i l-;; H.i:j -

:;,.'J: t=! ft j-'?. L 1 :t !.1 , • f . ..,.., +"# rri t.....: :~ -i..; -

J.:h: :. t~ 1ffi ~-a nl§ :µ_._-; p .. -,:!: E -t 1- ' - Ht--. L

).. ~ ~ L L.

J c 1-4=--t, ~· t l,F,ct ~gc, t --.-r+-i 1,1 -· ' -r.llffl 't' ltJ"7 ---f ~, t f ,-;

~ I ~ Fl= :-_t ' H~ e~E ,I.;=:. ~ ''f'. 3:.t..±.- . '="1 t" . - i== .., . ":IPL IHz: .;

l-'.f"W :-t· ~-- -

::n--- .--:. L~ - -

• II • 8.:f

1. h 1 - ft$ - - . ... ,,._.,.

i- 'H < 1= ,...,~ - . ; I. '1 ~ ~ "" ·~ cj='± _;_:_Ft= -.++l-... rt~ .. i-.-,..,.. +- -... ·-·. 4 -'

:_ . ; . 'f:lr . .F-El !. ,J 'j 1-e

.FF. . i"l F.'!: 'fa -- ~-I':'½. t'i~~ : : : E P. . i :

n:.-, 4T' " IV frF.I ~ •a• . ., .- I-: ....... t & ..;. :I,... "".-i ~

't r. I-

I I I ; - - H '- ;:::I~ -¾ +-

.i--.: t ~-~ .. = i' ~- ' - , ,~ . .

!" ·-i ~ • -+ t I

' - I ' ,

I L..i , I LI. f • : t +-

r. i. -"' L ~ 1. L'

. - ' ...: ..:.i :c. -_:r~~ 7" ;.:-11". -

' -r·u f-----:-1..t-

1- ,~ -- -1- -II I I I l - d .', l -j

j r::, .,,,.,, )' rrc-r: j

. ·~··· '1-------l . J . •

' h -➔ . I. r ~ '.. ..,. ,, :- ""Fl ~ .. .. :n J ·F ±1-Fl" T ·---- t- --1-_ CI I

I I '"'· r--.-< ;+' I ~ . ' . .1 •-t• :i '7. - ,

-~ ' . 4-f,=; . i=P - I -· -1~ Lt - . ~ r - .,··t ~.,, . / tc ; f .

~~ 1- . '.;, ~ ➔ l1 11 ' j ; - I . + ' ,§g :!~ lffll :1 - I v' I . - I I

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JE-11SSP-6M GENERAL CHARACTERISTICS

Turns Ratio 1: 1

Impedance Ratio 600/150 - 600/ 150


Secondary Load Resistor 600 ohms



Maximum Input Level at 20Hz +18dBv (Re: 0.775v)


Package Mu-metal can (standard) or octal Iype plug

Termination Wire leads or 11 pin plug (octal type)

Dimensions 1-5/8" diameter , 1-3/4" high (standard) 1·5/8" diameter, 2,5" high (octal p lug)

Mounting (standard) Capacitor clamp supplied

TYPICAL PERFORMANCE

Insertion Loss - 1.0dB

Input I mpedance @ 1 kHz 734 ohms @ 1 Ok Hz 745 ohms

Secondary Source Impedance @ 1 kHz 734 ohms @ 1 Ok Hz 745 ohms

Frequency Response lRe: 1kHz) @ 20Hz - 0.25dB @ 20kHz 0dB (ref.)

Bandwidth @- 3d8 160kHz

Phase Response @ 20kHz - 5 deg

Rise Time ( 10%·90%) 1. 7µ S

Overshoot < 3.5%

Total Harmonic Distortion (Below Saturation) 0.035%@ 20Hz 0.018%@ 30Hz 0.008% @ 50Hz

Input Level @ 1% Saturat ion (dBv Re: 0.775v) +17dBv @ 20Hz +21dBv@ 30Hz +26dBv@ 50Hz


Common-Mode Rejection Ratio > 90dB@ 1kHz > 70dB@ l0kHz

1617 NORTH FULLER AVENUE HOLLYWOOD, CALIFORNI A 90046

PHONE (2131 876-0059

(Vfsirors by Appointment Only}

1,S/8"

r- o. 7" -1


1•5 /8"

2·1/2''

1 I

.. .. .. .. .. -



Data Sheet

The JE-11 P-1 is a 1: 1 turns ratio line input transformer for high input impedance circuits (10K ohms and higher). It handles levels to +18dBv. Re: 0. 775v @ 20Hz. Bel ow satura• tion, the 20Hz THD is less than 0.045%. The high grade Nickel alloy core yields very low distortion even with source impedances up to several thousand ohms.

The bandwidth is 69kHz with < 2% overshoot. The series losses are equivalent to 3700 ohms, so the level loss will be the same as a voltage divider made with a 3700 ohm series resistor and a shunt resistor equal to the load connected to the secondary . If the load is 10K ohms, no RC network is required across the secondary. For 1 SK ohm load, an RC network of 30K ohms and 270pF is required to damp the resonance. If the load is 100K or higher. an RC network of 13K ohms and 620pF is required. For other loads such as input circuits with shunt capacitance, our com· puter can derive optimum RC net· work values to minimize t ransient

.distortion and maximize bandwidth and generate revised response and impedance results.

""' tsj I ... ... "" • ...

JE-1 l P-1

JE-11P-1 LINE INPUT

TRANSFORMER

......----.._.

The standard package has wire leads. Octal plug versions are available for all popular pin con· nections with or without the RC network built-in. ,- - - - - - - - - - - - - - - - - - - -

I 111 I RED ______ Y.:..;l::.:,W:..,__..;_-o, ___ --4..,_ _ __. TO AMPLIFIER I INPUT

I I I I BRN

I I I - --------

( 1) AL ~ 10K ohm

AN not required

CN not required

(2) Al "' 15Kohm

AN • 30K ohm

CN • 270p f

ORG

BLK

WHT

(3) AL # 2.2M ohm

AN • 13K ohm

CN • 620pf




This column with 15kS1 load. This column with no load. 2kHz Square Wave

50µS/division

5µS/division

1µS/division



The response and impedance curves were generated by a Hewlett/ Packard System 45 Desktop Computer and a 9872A Plotter. The curves are the calculated results from an equivalent circuit model using the H/P AC Circuit Analysis program. This method has made it possible to display the impedance curves up to 200kHz showing the secondary resonance and RC network damping effect. Measured data from many prototypes were used to derive the model to represent the average performance.

The distortion curves were generated by a Hewlett / Packard 9815A/ 9862A programmable calculator/plotter with a polynominal curve fit program. The distortion measurements employed a Sound Technology 171 OA Analyzer. Verified accuracies are on the order of one pen line width.

DISTORTION

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JE•llP-1 GENERAL CHARACTERISTICS

Turns Ratio 1: 1

Impedance Ratio (15K/ 15K)


Secondary Load Resistor Secondary RC Network

15K ohms 2.2 Meg ohms 30K ohms. 270pF 13K ohms, 620pF (most plug-in ty pes have RC net built-in)


Magnetic Shield 30d8, separate case lead (standard) 60d8, (octal plug-In wpes)

Maximum Input Level at 20Ht +18d8v (Re: 0.775vl


Packege Mu-metal can (standard) or octal plug

Termi nation Wire Leads (standard) Octal p lug types also available

Dimensions 1-1 /8" diameter, 1-1 / 16" high (standard) 1-5/ 16'' diameter, 2" high (octal plug)

Mounting (standard) 2 holes, 0. 7" center-to-center/self-tapping screws supplied

TYPICAL PERFORMANCE

Voltage Gain Input Impedance @ 1kHz

@ 10kHz Frequency Response @ 20Hz (Re: lkHt) @ 20kHz Bandwidth @ -3dB

Phase Response @ 20kHz Rise T ime (10%-90%1 Overshoot

Secondary Source Impedance 4300 ohms@ 1 kHz 4900 ohms@ l0kHz

With 15K load

- 2dB 18K ohms 15.6K ohms - 0.0JdB - 0.25dB 69kHz - 23 deg 5µS < 1%

Total Harmonic Distortion (Below Saturation) 0.045%@ 20Hz 0.03% @J0Hz 0.013% @ 50Hz

Input Level @ 1% Saturation (dBv Re: 0.775v) +17d8v@ 20Hz +20d8v @ 30Hz +26d8v@ 50Hz


Common-Mode Rejection Ratio > 75d8@ 1 kHz > 55dB@ 10kHz

With 2 .2Meg load

- 0 .05d8 166K ohm 20K ohms - 0.0JdB - 0.12d8 69kHz - 24 deg 4.SµS < 2%


PHONE 12131 876-0059

(Visitors by Appointment Only}

0

0.7"

~ 0

Co., .. ::J r-- 1·1/ 8"---1

I 1-1/ 16"

L _______ Mounting Holes

Clearance for # 4 screw Lead Holes

Use 0.35" hole to clear grommet

T7 l 15/16"

~ --

2"

I

~ .. - --

l


www.SteamPoweredRadio.Com..



SPECIA

L TYPES



Data Sheet

The JE-44K-DX is a step-up transformer for matching a 40 ohm moving coil cartridge to the 47K ohm input of a standard phono preamplifier. The transformer steps up the cartridge ou tput level by 19.7dB and bridges the cartridge with about 400 ohms input impedance.

The JE-44K-DX has a multiple interleaved layer winding for low leakage inductance. This yields wide bandwidth quite insensitive to load, low losses which affect noise in the upper spectrum, and very high frequency low O resonance. A series RC network of 13K ohms and 130pf should be connected across the secondary for minimum transient distortion. The high frequency bandwidth is 170kHz with only - 10° of phase shift at 20kHz. The rise time is 2.3µS with less than 1 % overshoot.

The input circuit of the phono pre-amp loads the transformer in 4 7K ohms. If there is a capacitor across the input, it should be removed. Also any cable used on the secondary of the transformer should be a special low capacitance type and no longer than necessary for minimum capacitance.

The series loss ratio referred to the secondary for 20kHz bandwidth is 1.4 ohm/ohm. This results in the transformer related noise figure of only 1. 7dB. The 1 Ok Hz secondary source impedance is only 2.4% higher than at 1 kHz, so the noise spectrum is very close to a pure resistance.

The dis tortion at 20Hz is on the order of 0.1 % for all levels up to 30mv at the input. At 30Hz, 0.06% and at 50Hz. 0.03%.

Faraday type electrostatic shields are used between the primary and secondary sections. Combined with balanced capacitance in the primary winding, this e liminates capacitive coupling through the t rans· former of high frequency environmental noise which is common to the two input leads. The Faraday shield (black lead) shou ld be con· nected to the same ground as the low side of the secondary (orange lead).

The transformers are cased separately (not paired), with dual mu-metal cans for greater than 60dB of magnetic shielding. They can be mounted with two self-tapping sheet metal screws (supplied) or ring type capacitor clamps (supplied) which allow custom orientation for minimum hum pickup for each channel. The two mu-metal cans can be grounded with the two white lead wires.

JE--44K- DX

4014K ,- ------- - --- -----, I I I I I I

RED I I VEL

400HM CARTRIDGE

BRN I t ORG

BLK

WHT

JE-44K-DX 400HM

MOVING COIL CARTRIDGE

INPUT TRANSFORMER

--------------,---




2kHz Square Wave

50µS/division

5µS/division

1 µ$/division



All curves were generated by a Hewlett-Packard 9815A/ 9862A programmable calculator/ plotter. All calcu lations were either derived from or verified by actual measurements. Verified accuracies are on the order of one pen-line width.

DISTORTION

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Turns Rat io 1 :10



Secondary Load Impedance 47K ohms (Phono pre-amp)

Secondary Load Resistor None required

Secondary RC Network RN : 13K ohms CN ~ 130pf


Magnetic Shield 60d8, separate case leads

Maximum Input Level at 20Hz - 12dBv (Re: 0.775v)


Package Dual Mu-metal can


Dimensions 1-5/16" diameter. 1.1 /4" high

Mounting 2 holes, 0. 7" center-to-center, self-tapping screws or clamp

TYPICAL PERFORMANCE

Voltage Gain 19.7d8

Input Impedance 420 ohms @ 1 kHz 375 ohms@ 10kHz

Secondary Source Impedance 5450 ohms @ 1 kHz 5580 ohms@ 1 Ok Hz

Frequency Response (Re: l kHz) - 0.3d8 @ 20H z

0.02d8@ 20kHz (No resonance peak)

Bandwidth 170kHz@ - 3d8

Phase Response - 10° @ 201<Hz.

Rise T ime 2.3µS (10%-90%)

Overshoot < 1%

Total Harmonic D istortion (Below Saturation) 0.12% ma><imum@ 20Hz 0.065% maximum@ 30Hz 0.03% ma><imum@ 50Hz 0.006%@ 1 kHz

Input Level @ 1% Saturation (dBv Re: 0.775vl - 12dBv@20Hz - 7d8v@30Hz

OdBv@50Hz Common-Mode Voltage (ma><imum)

:> 200v peak Common-Mode Rejection Rat io

> 85d8@ 1 kHz > 65d8@ 10kHz

Transformer Noise Figure• 1.7d8 Re: 36.1 ohms '•

• Add to amplifie, NF rel erred to impedance of 4935 ohms. (Parallel value of secondary source ,mpedance and load)

• 'Parallel value of source impedance and input impedance.

0

0

Mounting Holes Clearance for ,r4 ~crew.

Lead Holes Use 0.35" hole to clear grommet.

1617 NORTH FULL ER AVENUE HOLL YWOOO, CALIFORNIA 90046

PHONE (2131 876-0059

(Visitors bv APPoi(l(ment Onlv)



Data Sheet

The JE-34K-DX is a step-up transformer for matching a 3 ohm moving coil cartridge to the 4 7K ohm input of a standard phono pre-amplifier. The transformer steps up the cartridge output level by 31 dB and bridges the cartridge with about 30 ohms input impedance.

The JE-34K-DX has a multiple interleaved layer winding for low leakage inductance. This yields wide bandwidth quite insensit ive to load, low losses which affect noise in the upper spectrum, and very high frequency low O resonance. A series RC network of 13K ohms and 120pf should be connected across the secondary for minimum transient distortion. The high frequency bandwidth is 148kHz with only - 11° of phase shift at 20kHz. The rise time is 2.0µS with less than 1% overshoot.

The input circuit of the phono pre-amp loads the transformer in 4 7K ohms. If there is a capacitor across the input, it should be removed. Also any cable used on the secondary of the transformer should be a special l ow capacitance type and no longer than necessary for minimum capaci tance.

The series loss ratio re ferred to the secondary for 20kHz bandwidth is 1.33 ohm/ohm. This results in the transformer related noise figure of only 1.4ct8. The 1 0kHz secondary source impedance is only 1.9% higher than that at 1 kHz, so the noise spectrum is very close to a pure resistance.

The distortion at 20Hz is on the order of 0.1 % for all levels up to 10mv at the input . At 30Hz, 0.06% and at 50Hz, 0.03%.

Faraday type elect rostatic shields are used between the primary and secondary sections. Combined with balanced capacitance in the primary winding, this eliminates capacitive coupling through the transformer of high frequency environmental noise which is common to the two input leads. The Faraday shield (black lead) should be connected to the same ground as the low side of the secondary (orange lead).

The transformers are cased separately (not paired), with dual mumetal cans for greater than 60d8 of magnetic shielding. They can be mounted with two self-tapping sheet metal screws (supplied) or ring type capacitor clamps (supplied) which allow custom orientation for minimum hum pickup for each channel. The two mu-metal cans can be grounded with the two white lead wires.

JE- 34K- DX

J/4K ,------------ -----1 : ------------,

RED I YEL

30HM CARTRIDGE

BRN ORG

BLK

WHl ---------------'----'- _ _ _ _ _ _ _ _ _ _ _ _ _ _ WHT

JE-34K-DX 30HM

MOVING COIL CARTRIDGE

INPUT TRANSFORMER

l20pl



REGARDING THE OSCILLOSCOPE PHOTOS Actual oscil loscope photos were made from a Tektronix Model 453A (certified calibration).

2kHz Square Wave

SOµS/division

■■■■

SµS/division

1 µ $/division



-

All curves were generated by a Hewlett-Packard 9815A/9862A programmable cal cu la tor / p lotter. A ll calculations were either derived from or verified by actual measurements. Verified accuracies are on the order of one pen-line width.

DISTORTION

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w II H--t--t--H-t-t-+-H-+++:-'.""+.--+--:rit--;-,1--+-H-+++----,-+--+--r,-t--,t--+-H+++-'--+--+--+-r,-t--,t-+-H-++1 1121121

:2121 :2121121 :2K

FREQUENCY <HZ> :21211211<




Turns Ratio 1 :36.5



Secondary Load Impedance 47K ohms (Phono pre-amp)

Secondary Load Resistor None reQuired

Secondary RC Network RN "' 13K ohms CN "' 120pf

Faraday Shield Separa te lead

Magnetic Shield 60dB, separate case leads

Maximum Input Level at 20Hz - 21 dBv (Re: 0. 775v)


Package Dual Mu-metal can


D imensions 1-5/ 16" diameter, 1-1/4 .. h,gh

Mounting 2 holes. 0.7" center-to-center, sell-tapping screws or clamp

TYPICAL PERFORMANCE

Voltage Ga,n 31d8

Input Impedance 31 ohms@ 1 kHz 29 ohms @ 1 Ok Hz

Secondary Source Impedance 5200 ohms @ 1 kHz 5300 ohms@ 10k Hz

Frequency Response (Re: 1 kHz) - 0.35d8 @ 20Hz +0.02d8 @ 20kHz


148kHz @ - 3dB Phase Response

1 !'' @ 20kHz Rise Time

2µS (10%-90%) Overshoot

< 1% Total Harmonic Distortion (Below Saturation)

0.12% maximum @ 20Hz 0.06% maximum@ 30Hz 0.027% maximum @ 50H7 0.025% @ 1 k Hz

Input Level @ 1% Saturation (dBv Re: 0.775v) - 24d8v@ 20Hz - 19dBv@ 30Hz

13dBv@50Hz Common-Mode Voltage (maximum)

> 200v peak Common-Mode Rejection Ratio

> 85dB@ 1 kHz _,.65d8 @ 10kHz

Transformer Noise Figure• 1.4d8 Re: 2.7 ohms••

• Add ro amplifier NF referred to impedance of 4 720 onms. /Parallel value of secondary source impedance and load)

• 'Parallel value of source impedance and inpuc impedance.

Mounting Holes Clearance lor = 4 screw

Lead Holes Use 0.35" hole 10 clear grommet

1617 NORTH FULL ER AVENUE HOLLYWOOD, CALIFORNIA 90046

PHONE (213) 876-0059


•


www.SteamPoweredRadio.Com•

Data Sheet

The JE-MB-C is a 1: 1 turns ratio microphone bridging t ransformer with a single primary and a single secondary winding, each surrounded with its separate Faraday shield.

The JE-MB-C can be used to isolate and balance an unbalanced preamplifier input or to bridge a balanced microphone line, which is terminated with a balanced preamplifier input , to feed a second balanced preampli f ier input.

The transformer, with separate Faraday shields for each winding, isolates and rejects the common- mode noise caused by the noise voltage difference between the chassis of the two mixers. With this type of isolation, the microphone shield can be connected through to the chassis of one mixer but need not be connected through to the second mixer chassis. Instead, the chassis (shield) of the second mixer connects only to the Faraday shield of the secondary. This eliminates the ground loop which would be caused if the microphone shield were connected through to both mixers.

Phantom power can be provided by the mixer which terminates the microphone directly.

If cables wi th the shell connected to pin 1 (shield) are used in the system, insulated mounting will be required for the connectors.

The design is optimized for a source impedance at the primary of 150 ohms (microphone) and a secondary load of 1000 ohms ( typical microphone preamplifier input impedance). No resistors are used in the usual applicat ion of a "mic-split box."

If the transformer is used to balance an unbalanced preampli fier input, a secondary termination resis tor may be necessary to result in a load of 1000 to 2000 ohms . A higher secondary load impedance may result in a ringing response.

JE-MB C

I ,so 1so ORN I

UNBALANCED MICROPHONE PREAMPLIFIER

BAN I I I ,,.. ____ .._ ___ -----<

I I 1 I RL 1500

BLK I I I '--V;..:E..:..L __ -4,

L - _J BLK

WHT

MICROPHONE INPUT ISOLATION TRANSFORMER

MICROPHONE INPUT

DIRECT OUTPUT

FEMALE

3

MALE

3

JE-MB-C MICROPHONE

BRIDGING TRANSFORMER

JE MB C ,----------1 1BRN

•

I BLK

I ---- -WHT

VEL

• ORN

BLK

------'

LIFT ON

GROUND SWITCH

CHASSIS

MIC SPLIT BOX SCHEMATIC

MALE

ISOLATED OUTPUT




2kHz Square Wave

50µS/division

5µS/d ivision

1 µ S/division



All curves were generat ed by a Hewlett-Packard 9815A/9862A programmable calcu lator/ plotter. A ll calculat ions were either derived from or verified by actual measurements. Verif ied accuracies are on the order of one pen-line width.

DISTORTION

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:221

FREQUENCY <HZ>



FREQUENCY RESPONSE

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PHASE RESPONSE

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FRElilUENCY < HZ >

-B

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2IZIIZIIC

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2 211211<




Turns Ratio 1 : 1

Impedance Ratio 150/150


Secondary L oad Impedance 1 K ohms (mic pre-amp)

Secondary Load Resistor None required

Secondary RC Network None required

Two Faraday Shields Separate leads

M agnetic Shield 30dB. separate case lead

Maximum Input Level at 20Hz •2dBv (Ae: 0 .775v)




Dimensions 1-1/8" diameter. 1-1 / 16" high

Mounting 2 holes. 0.7" center-to·center, self-rapping screws supplied

TYPICAL PERFORMANCE

Vol tage Gain - 0.8dB

Input Impedance 1040 ohms@ lkHz 1080 ohms@ 10kH z

Secondary Source Impedance 245 ohms@ 1 kHz 290 ohms@ 1 Ok Hz

Frequency Response (Re: l k Hz) - 0.25dB@ 20Hz - 0.20dB @ 20k Hz (No resonance peak)

Bandwidth 88kHz@ - 3dB

Phase Response - 15" @20kHz

Rise T ime 4.3µS (10%-90%)

Overshoot < 1%

Total Harmonic Distortion (Below Saturation) 0.18% maximum@ 20Hz 0.10% maximum@ 30Hz 0.05% maximum@ 50Hz 0.005%@ 1 kH z

Inpu t Level @ 1% Saturation (dBv Re: 0.775v) - 2dBv@20Hz t3dBv @ 30Hz

Common-Mode Voltage (maximum) •200v peak

Common-Mode Rejection Ratio > 85dB@ 1 kHz > 65dB@ l0kHz

0.7"

0

0

~0.7"

Mounting Holes Clearance for # 4 screw


1617 NORTH FULLER AVENUE HOLLYWOOD, CALI FORNI A 90046

PHONE (213) 876-0059

(V isitors b y Appointment Only)

wigfi




Data Sheet

The JE-MB-D is a 1: 1: 1 turns ratio microphone bridging transformer with a single primary and two secondary windings, each surrounded with its separate Faraday shield.

The JE-MB-D can be used to bridge a balanced microphone line, which is terminated with a balanced preamplifier input, to feed second and third balanced preamplifier inputs.

The transformer, with separate Faraday shields for each winding, isolates and rejects the common-mode noise caused by the noise voltage difference between the chassis of the multiple mixers. Wi th this type of isolation, the microphone shield can be connected through to the chassis of one mixer but need not be connected through to the second or third mixer chassis. Instead, the chassis (shields) of the second and third mixers connect only to the Faraday shield of the appropriate secondary. This eliminates the ground loops which would be caused if the microphone shield were connected through to multiple mixers.


The design is optimized for a source impedance at the primary of 150 ohms (microphone) and secondary loads of 1000 ohms (typical microphone preamplifier input impedance). No resistors are used in the usual application of a "mic-split box."

The primary winding is interleaved eqlfally with both secondary windings for matched transfer characteristics to both secondaries and to minimize variations in response with an unloaded secondary.

If cables with the shell connected to pin 1 (shield) are used in the system, insulated mounting will be required for the connectors.

STEREO MIC MATRIX

A pair of these 3 winding 1: 1: 1 transformers can be used to matrix the Sum and Difference signals of a stereo microphone to the left and Right format. Connect each microphone to a primary, and crossconnect the secondaries in series and anti-series for left and Right outputs. The Faraday shields can be connected together as one in applications not requiring separate shields.

M11 k0,111tfll1 INl'UI

J( Mfj 0 ,------- ---, ' : MAll

I ......:.••::::•:..:.•---.... . .

I I . ' I Rt0 1 t ORt. . I I . I

V IO I

j 'I'll ' CRN I

I Q~AY I . I I

IL.U 1

' I ff.U, 1

' !,_ ___ ---- - -'

n,11

llFI ___ ...__ ,...,,.

"" GROUNO l1Jf sv.1,c .. u

MIC sP!.11 80)( SCHEMATIC

ClNt (ff M ICJIO l't10Nl

''VlAHO OUTNf .

1,0lAfft) a-nro, •

1.IO[S M1(.AOfl'>4QN(

H ilwl .-,U

JEMALl

JE-MB-D MICROPHONE


J E- MB - D .-----------. I IMN I

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v,o I

GHNV I MAll

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LUI

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JE- MB- 0 ~ICHlf

I a~~ : Ct1AfrrfNtl

I • ••o

VIO

Q G•N

BLU

' I GltAV ' OLK I

,;] I I '- - - - ,- - - - - - _,

'\l'WHf

STE RED MICROPHONE MA TRIX SCHEMA TIC



REGARDING THE OSCILLOSCOPE PHOTOS Actual oscilloscope photos were made from a Tektronix Model 453A (certi f ied calibration).

2kHz Square Wave

SOµS/division

SµS/division

1 µS/division



A ll curves were generated by a Hewlett-Packard 9815A/ 9862A programmable ca lcu lat or/plotter. A ll calcu lations were either der ived from or verified by act ual measurements. Verified accuracies are on t he order of one pen- line width.

DISTORTION

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FREQUENCY RESPONSE

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PHASE RESPONSE

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FREQUENCY <HZ>




Turns Ratio 1: 1 : 1 (2 secondaries)

Impedance Ratio 150/150/150


Secondary Load Impedances 1 K ohms (mic pre-amps)

Secondary Load Resistors None requi red

Secondary RC Networks None required

Three Faraday Shields Separate leads


MaKimum Input Level at 20Hz +2dBv (Re: 0.775v)

TYPICAL PERFORMANCE

Voltage Gain

Input Impedance

Secondary Source Impedance

Frequency Response (Re: lkHz)

Bandwidth

Phase Response

Rise Time

Overshoot

@ lkHz @ 10kHz

@ lkHz @ 10kHz

@ 20Hz @ 20kHz

@ - 3d8

@ 20kHz

(10%-90%)

PHYSICAL CHARACT ERISTICS


Term ination Wire leads

Dimensions 1-118" diameter, 1-1/ 16" high

Mounting 2 holes. 0.7" center•to-center. self-tapping screws supplied

TYPICAL PERFORMANCE

Total Harmonic D istortion (Below Saturat ion) 0.18% maximum @ 20Hz 0.10% maximum @ 30Hz 0 .05% maximum@ 50Hz 0.005% @ 1 kHz

Input Level@ 1% Saturation (dBv Re: 0.775v) 0dBv@20Hz

+4dBv @30Hz + 10dBv @50Hz

Common-ModP. Voltage (maximum) > 200v peak

Common-Mode Rejection Ratio > 85d8@ 1 kHz > 65dB@ lOkHz

Secondary Loads One Two

- 0.9d8 - 1.4d8

1040 ohms 575 ohms 1080 ohms 590 ohms


- 0.25dB - 0.25\JB - 0.20dB - 0.16dB

(No resonance peak)

88kHz 100kHz

- 1s0

- 12"

4.0µS 3.6µS

< 1% < 1%

0

Mounting Holes Clearance for #4 screw


1617 NORTH FULLER AVENUE HOLLYWOOD, CALI FORNIA 90046

PHONE (213) 876-0069




Data Sheet

The JE-MB-E is a 1: 1: 1: 1 turns ratio microphone bridging trans• former with a single primary and three secondary windings, each surrounded with its separate Faraday shield.

The JE-MB-E can be used to bridge a balanced microphone line, which is terminated with a balanced preamplifie r input, to feed three additional balanced preamplifier inputs.

The transformer, with separate Faraday shields for each winding, isolates and rejects the common-mode noise caused by the noise voltage difference between the chassis of the multiple mixers. With this type of isolation, the microphone shield can be connected through to the chassis of one mixer but need not be connected through to the additional mixer chassis. Instead, the chassis (shields) of the additional mixers connect only to the Faraday shield of the appropriate secondary. This eliminates the ground loops which would be caused if the microphone shield were connected through to multi pie mixers.


The design is optimized for a source impedance at the primary of 150 ohms (microphone) and secondary loads of 1000 ohms (typical microphone preamplifier input impedance). No resistors are used in the usual application of a "mic-split box."

The primary winding is interleaved equally with each secondary winding for matched transfer characteristics to each secondary and to minimize variations in response with unloaded secondaries.

If cables with the shell connected to pin 1 (shield) are used in the system, insulated mounting will be required for the connectors.

MICROPHONE INPU T

O IHECl OU TPUT

FEMALE

3

MALE

2

JE-MB-E MICROPHONE


JE MB E ,---- -- -- - - --1 I I

I I I 1BHN

•

I ORNIWHT I I

•

ORN

VH

1· 1

GHN

8LU

RE DIWIH

VIO

• GRAV

BLKIWHl

I --- - - ------WHl

CHASSIS

GROUND Llf T SWITCH ES

MIC SPLIT BOX SCHEMATIC

MAU

3

3

!SULA I EU OUTl'UT I

ISOU\lEO OU TPUl 7

ISOLAHD OUTPUT 3

'HIIS Wl flE MAV BE HEO/V(L

GRN/ WHT. OR BRNIWHT

wigfi






2kHz Square Wave

50µ$/division

5µ S/division

1 µ$/division



-

-

All curves were generated by a Hewlett-Packard 981 5A/ 9862A programmable ca lculator/plotter. A ll calculations were either derived from or verified by actual measurements. Verified accuracies are on the order of one pen-line width.

DISTORTION

·-

I. 111 ' •

1!11o I

li'll!I I - '-1121 -3121 -2121 -1 121 IZI

INPUT LEVEL < DBV

-t D -t lJ r

I lJ ;o :I D z -('I

l:;:i

tn -t □ ;o -t -D z "' 1l 111 ;o

('I 111 z -t V

+ 1121 +2121 +.3121 RE . 77:..V>



INPUT IMPEDANCE

F"REGIUENCY <HZ>

SECONDARYSOURCEIMPEDANCE Ii l! g lS

A

I: I □ V

w V z II 0

....L w n. I:

w V I! :J □ lJ1

>-a: II 0 z □ V . w lJ1

21Zl .. F"REl'.ilUENCY < HZ>



-

-

A

HI 0 V

...J w > w ...J

I-::I a. I-::I □

w > I-a: ...J w I!

2121

A

m w

2111121

FREQUENCY RESPONSE

2K

FREGIUENCY <HZ>

PHASE RESPONSE

2111K

-6

-a

21211211<

Ill

W l-,---'-l.l--,......l....J...-14--+-l-+-+-++'-~-'-'-'-+-l'-+-+-,-;...i...+......++!--'-"--'-4,--'+-f-+-++-+-+++++---+-+_.,.,..+-Nl-r-+,<:!,- r+-l·• -s-121 I! l!I w 0 V I----J+.!.-4-+'~~+-=!~-H-~:.....+.::,..:-_+-.i--:4-..+4--1+!--~+-l-+.fr.~+::f"-++-l+-.JJ+~.:..\-H-l--++f4::!H-l 1111111

w > 2111121 I-a: ...J w I! 25"13

I

2 13 2 121121 2K 2IZIK 2011!K

FREGIUENCY <HZ>




Turns Rat io 1: 1: 1: 1 (3 secondaries)

Impedance Ratio 1501150/150/ 150


Secondary Load Impedances 1 K ohms (mic pre-amps)

Secondary Load Resistors None requored

Secondary RC Networks None required

Four Faraday Shields Separate leads

Magnetic Shield 30d8, separate case lead

Maximum Input Level at 20Hz +11 dBv (Re: 0.775v)

TYPICAL PERFORMANCE

Vol tage Ga,n

Input Impedance

Secondary Source Impedance

Frequency Response (Re: 1kHzl

Bandwidth

Phase Response

Rise T ime

Overshoot

Ringing

Mounting Holes

@ 1 kHz @ 10kHz

@ 1kHz @ lOkHz

@20Hz @ 20kHz

@ - 3d8

@ 20kHz

(10%-90%)

> 300kHz

Clearance for =4 screw Lead Holes

Use 0.35" hole to clear grommel

One

1.2d8

1100 ohms 1170 ohms

300 ohms 41 0 ohms

- 0.ldB - 0.6d8




Dimensions 1·5/16" diameter, 1-9/16" high

Mountfng 2 holes, 0.7" center-to-center, self-lapping screws or clamp

TYPICAL PERFORMANCE

Total Harmonic Distortion (Below Saturat ion) 0.05% ma>1imum@ 20Hz 0.03% maximum@ 30Hz 0.01 5% maximum@ 50H7 0.002% @ 1 kH z

Input Level @ 1% Saturat ion (d8v Re: O. 775v) +10d8v@ 20Hz •14dBv@ 30Hz -119dBv@50Hz


Common-Mode Rejection Ratio > 85d8@ 1 kHz > 65d8@ l OkHz

Secondary Loads

Two Three

- 1 .8d8 - 2.3dB



- 0.ldB -0.l dB - 0.4d8 - 1.0dB

(some resonance @ 300kHzl

48kHz 60kHz

- 21 " - 16"

6.7µS 5.3µS

< 1% < 1%

< 9% < 11%

40kHz

- 18"

8.0µS

< 1%

< 7%

1617 NORTH FULLER AVENUE HOLL YWOOO, CALIFORNIA 90046

PHONE (2131 876-0059

(Visicors bv Appointment Only)


Data Sheet

PAO IN/OUT SWITCH r·-----------------···••···--'

(INSULATED BUSH1NGI ' '

JE•08·D 201<./lSO

(133K/1KI $WITCHCRAn N 111 LJ

(FROMGUITAR) n ,--o--lR\•·· .. ~ .. ····- • OHO ;·----i--•i--···1

(TO CUI T AA AMPI

INPUl/ BRIDGING JACKS

22ul Uuf 25V 25V

2 2KO T 02.Zuf

FILTER SWITCH

SCHEMATIC DIAGRAM OF 1'VPICAL TRANSFORMER APPLICATION A GUITAR DIRECT BOX

(TRANSFORMER MAY ALSO BE MOUNTED INSIDE THE INSTRUMENT FOR A LOW- IMPEDANCE GUif AR)

i l n::BRN 3-: t ' I I

: : X l.R•3·11C : I 1D3f-'J ! : RED 2 ~ (TO

l : : M IXER)

' OUTPUT 1

• _____ J JACK :

BLK ~--- ,-· GND SWITCH

JE-DB-D DIRECT BOX

TRANSFORMER

50µ$/division 2kHz square wave 5µS/division

REGARDING THE OSCILLISCOPE PHOTOS

Actual oscill i scope photos wece made from a Tektron1x Model 453A (certif1ed calibration) . The transformer was (ea with source impedance of 20K ohms (repr esenting a typical pickup) and had a load impedance of lK ohm (cepresenting a typical m1c preamplifier input) .

l µS/d ivision -->-



APPL ICAT IONS NOTES

IMPEDANCE MATCHING CHARACTERISTICS

The impeoance matching requirements of the oirect-box transformer are bi-di r ectional.

\al The high impedance guitar pickup must be transtor med to a low impedance in the range ol IS0-200 ohms (the same as a low impedance microphone) to match the source impedance requ1tements (or the ,nput of a low impedance microphone preamplifier.

(bl At the same time, the primary of the direct-box transformer must present a load to the guitac pickup oC not less than SOK ohms, and preferably higher, such as lOOK ohms.

Synthesis of (a) :

Measurements of the actual source impedances o r many guitar pickups indicate some variation centering around 20K ohms . The impedance ratio of 20K/1SO was chosen to match the average guitar pickup to a low impeoance in the range of 150-200 ohms to satisfy requirement_ (a).

It 1s important to match the input of a low impedance microphone preamplifier with a source impedance of lS0-200 ohms because most microphone preamplifiers utilize an essentially unterminat_ed, htgh-ratio input transformer exhibiting a somewhat reactive input impedance (not a pure resistance) . Therefo r e the frequency response of the transformer will be dependent upon the source impedance. More specifically, highec soucce impedances will cause a loss of high frequencies, and lower source impedances will cause a high frequency peak or resonance. This resonance creates tcansient distortion, which can be heard as a r ough or raspy high-frequency distortion, sometimes refered to as an "edgy" sound . It is often described as a "lack of transparency•. This resonance can be evaluated in the laboratory by observing the overshoot and ringing of a square wave on an osilloscope . To avoio this potential source of transient distortion, or frequency response error, created by operating the microphone preamplifier ' s 1nput transformer from a source impedance out s ide it ' s optimum range , the source impedance must be on the order of 150-200 ohms. Of course , the transformer used in the direct-box must also be free from resonances as is the JE-DB-D.

Synthesis of (bl:

The actual input impedance of a low impedance microphone preamplifier is not 150 ohms . The 150 ohm specification refers to the required source impedance to be connected to the input. The load impedance which the preamplifier presents to the microphone is usually on the order of 1000 ohms or higher .

Thts is done Coe two 1easons:

(1) The higher load impedance results in improved high-frequency performance of many microphones . In the case of condenser microphones with built-in amplifier circuits , the headroom may be improved, resulting in lower distortion.

(2) The h19hec load impedance also results in 4 to 5 dB higher output level from the microphone, which yields improved signal-to-noise ratio.

The impedance ratio of the direct-box transformer has been oeterm1ned by the synthesis of (a), which concerneo the impedance transformation of the source impedance of the guitar pickup to a new source impedance at the secondary. Of course , the transformer also tcansfocms impedance in the other direction by the same ratio, oc more properly , by the reciprocal o f that ratio. The 20K/1S0 ratio determined in (a) r educed (divided) the source impedance by a factor of 133. Likewise the input impedance of the microphone preamplifier will be Increased (multiplied) by 133 to a new input or load impedance at the primary . The resulting load impedance which the pr imary presents to the gu 1tar p ickup is 133K ohms, satisfying requirement (b) .

SPECIAL CONSIDERATIONS

Note that the direct-box transformer must operate as a 20K/150 ohm transformer in one direction , and as a

1K/133K transformer in the other direct ion. This requires some special design attention to response chacactecistics and losses . For e xample, the primary must exhibit high inductance and low capacitance in order to avoid loading the guitar pickup at the extremes ot the frequency range. If these reactive loading effects were not considered, both high and low frequency response losses would result due to the high actual source impedance of the guitar pickup. The JE-DB-D direct box transformer exhibits reactive loading , equivalent to about 600K ohms across the primary , wh ich does reduce the 133K figure to about llOK ohm load across the guitac pickup . • . still within acceptable l1mits to sat isfy requirement (b) .

Operation ot a lranstormer from a h19h actual source impedance also results in low lrequency d1slo1-tion if the primary inductance i s too low oc It the magnetic material used e xhibits e xcesive hysteresis losses . For these reasons, special attention has been given to both the magnetic material character1s l1cs and the winding configuation .

1'o evaluate any of the pe1formance paramc,tecs o r a transformer in the laboratory, always simulate the actual source and loao impedances which will be encountereo during opecation. In this case, a 20K ohm resistor 1s requireo 1n series with the t est oscil lator , and a lK ohm load resi s t or should be connected~ the secondary .

CROUNDrNC CONSIDERATIONS

The direct-box 1s used to interface the inpul 01 a low impeoance microphone preamplifier to:

( 1 J a guitar pickup alone.

( 2) a guitar pickup which is also connected tile input of a guitar amplifier.

( 3) the output ot an electronic instrument.

( 4 ) the output of the guitar amplilie,.

In case (1), the ground of the guitar must be connected through t o the ground o( the recording equipment by c l osing the ground s w1tch (refer to schemat ic diagram).

to

In all the other cases, which involve electron ic equipment , the ground o( the signal source may need to be isolated from the ground o! the recording equipment Cor lowest hum and buzz. The decision to operale with the ground s witch open or closed 1s always made "on the spot".

Refer1ng to the schematic diagram , note that lhe box itself is connected to the input ground , r ather than the ground pin tl of the 3 pin output connector . This decision results in lower buzz 1n the guitar amplifier in case (21. If the box were connected to the output gcound, the capacitance between the box and the internal wiring to the guitar amplifier input could cause hum or buzz into the guitar amplifier with the ground switch open. However, with the box connected to the input ground , as shown, caution must be taken to avoid any connection between the outer shell of the output connector and pin fl, which would shoct across the ground switch. This would occur if the cable connector useo at the output had an internal strap between the shell and pin fl. The safest solution 1s to use a mounting for the 3 pin output connector which insulates it from the box.

The schematic diagram shows the input connector s as insulated bushing types to avoid ground cucrents from flowing in the metal of the box itself . Actually a non-insulated type connector would not cause any g t ound currents if the only connection to the box ls at the connector.

With the ground switch open , a voltage potential could exist between the direct-box and the microphones o r stands . lf the direct box is allowed to make contact to a mic stand, the resulting ground current could cause hum or buzz . Caution should be e xercised to avoid personal contact with any two o f these metal objects simultaneously to avoid shock hazard.

DUAL FARADAY SHIELD

A Faraday shield is a copper foil shield inserted between the primary and secondary windings. Sometimes called an electrostatic shield, it ' s purpose is to significantly r educe the capacitive coupling fcom the p r imacy to the secondary . This type of shielding gives the transformer it's common-mode rejection characteristics usually refered to as isolation.



Refering to the schematic diagram, note that the JE-DB-D has two Facaday shields, as indicated by t he two vertical dashed lines between the windings. One surrounds the prmimary winding , the other surrounds the secondary. The use of two Faraday shields yields excellent isolation in both directions. The secondary shield significantly reduces hum and buzz in the

& microphone preamplifier (recording equipment). The . primary shield prevents hum and buzz in the guitac

amp~ifiec in case (2) . Without t he prima,y shield, capacitive coupling from the secondary shield to the high side of the primary would cause hum or buzz in the guitar amplifier . The leads for each winding and its respective shield are brought out through seperate holes in the case to maintain even lowec capacit -ance between primary and secondary cir cuits (improved isolation). Note that, in the direct box shown, each Faraday shield is connected to its respective ground circuit. The ground switch connects the two ground circuits together when it is closed.

The mu-metal case of the transformer provides JO dB of magnetic shielding to prevent hum pickup in the trans for mer itself . The case has a separate white lead and is connected to the box.

PAD CIRCUIT

For cases (1) s (2), the pad is switched out of the ci rcuit when the signal source is a guitar pickup, For cases (J) & (4), the 10 dB pad is swit ched in to prevent overload of t he t cansformec from higher output levels, 1. e ., from electronic instruments or guitar amplifier speaker outputs .

The pad presents a load to the output of the electronic instrument of about 6800 ohms and a source impedance to the direct-box transformer of about 16K ohms (approximating the guitar pickup). The latte r is required to prevent transien t distortion in the microphone preamplifier as described in requi rement (a) under "impedance matching characteri stics" .

Electronic instruments may have some DC voltage present at the output which would cause l ow frequency losses and distortion in the direct-box transformer. The t wo electrolytic capacit ors in series with the input signal block this DC voltage to maintain optimum

- low frequency performance .

FILTER CIRCUIT

The output signal of a gui t ar amplif ier may exhibit severe clipping from ~mplifier overload. However, the high frequency roll- off characteristic of the typical guitar speaker attenuates the resulting distortion products which are uppe r ha rmonics of the fundamental notes.

Since the direct-box transformer does not roll-off these upper harmonics , the clipping or distortion will be heard in the recording . The filter circuit can be s witched in to simulate the high frequency coll- off characteristic of the guitar speaker , more closely approximating the speaker' s sound. The filter response is 6 dB per octave starting at about 4 kHz to 5 kHz. The value of the filter capacitor can be changed foe more or less high frequency attenuation .

GUITAR CABLE LOSSES

The capacitance of a coi led guitar cable can be in the range of 1000 pf or greater . If the sour ce impedance of the guitar pickup is in the range of 20K ohms, the resulting high frequency roll-off s tarts at about 8 kHz. There will be even more high frequency losses if the coro is longer or if the pickup impedance is h igher.

This loss of the upper end of the f r equency spectrum will affect the "bc1lliance" of the instrument. All of this suggests that the short er the cable length between the high impedance pickup and the direct-box, the better the sound .

LOW IMPEDANCE GUITAR CONVERSION

Given enough space , the direct-box transformer can be installeo in the guitar to significantly reduce the capacitive l oad on the high impedance pickup. A connector on the secondary would then be a low impedance output which could drive a very l ong cable without high frequency losses (the same as a low impeoance microphone) . Since the low impedance conversion of the 9uitar also creates a step-down 20 dB voltage loss, a reciprocal conversion would be required at the guitar amplifier input. A microphone input transformer (step-up) installed in the guitar amplifier input curcuit will complete the conversion . Then the cable would be connected from the secondary of t he direct-box tcansfoemec to the now low impedance input of the guitar amplifier . The result will be a considerable improvement in high frequency response or brilliance, even with long c ables.


Turns Ratio 11.55: l

Impedance Rat io 20K/ 150

Primary Source Impedance 20K ohms (1ypical guitar pickup)

Secondary Load Impedance 1 K ohms (tYpical mic pre input)

Faraday Shield Two shields, separate leads

Magnetic Shield 30d8, separa1e leau

Maxinum Input Level at 20Hz +14.5dBv (Re: 0.775v)




Dimensions 1-1 /8" diameter, 1-1116" hiyh

Mounting 2 holes, 0 . 7'' cen1er-10-center. self-tapping screwssuppl,ad

TYPICAL PERFORMANCE

Voltage Loss 2'1 .3d8

Input Impedance 108K ohms@ 1 kHz BOK ohms @ l Ok Hz

Secondary Source Impedance 181 ohms@ 1 kHz 186 ohms@ 10kHz

Total Harmonic Dis tortion (Below Satun11ion) 0.45% maximum @ 20Hz 0.28% maximum @ 30Hz 0.14% maximum @50Hz 0.017%@ 1 kHz

Input Level @ 1% Saturation (dBv Re: 0.775v) +9dBv @20Hz +14d8v@ 30Hz +20d8v @ 50Hz

Frequency Response (Re: 1 kHz) - 0.75d8 @ 20Hz -0.9dB @ 20kHz

(No resonance peak) - 3d8 @ 40kHz

Phase Response - 28°@ 20kHz

Rise Time 6 .6 µS (10%-90%)

Overshoot < 1%


Common•Mode Rejection Ratio > 85dB@ 1 kHz > 65dB@ 10kHz

Also avai I ab le for PC mount ing.



.J t.l > ~

t.l > II[ .J t.l It

~ :r 0 V

"' V z a: 0

"' a. !:

I-:I a. ~

..,

,e

, .a

a.,

.. ,

FREQUENCY RESPONSE

JE-D8--0 2 01</I.~

R• = 22 I(

R I.. :: 1000 OHM

EG" ~ 0 C>SV <RE:. 77Sv-,

..... 2K J"'RE:ulUE:NCY <HZ)

INPUT IMPEDANCE

JE-D8-D 21aK/'IS:0

R 1..::::: 10;,0 OHM

Ee;. = 0 OBY < RC. 77SV >

_, "' F"RE:QUENCY <HZ)

DISTORTION

R• =

2 0 1-iZ

:30 >lZ

5'0 HZ

I KHZ ..,.....---,-~

l

-t 0 -t

~

:t

E :I 0 z

" 0

Ill -t C :0 -t

0 z A

l1 l'1 :0

" 2 -t

""''--~--------~-~--~-~ - '10 - ~ 0 - 20 -tB ~ ♦ID +20 +-3 0 INPUT LEVEL <OSV RE.7 7SV>

t I

' I

•

---""" ----

PHASE RESPONSE .

-rf ·- . ..,

A

Ill t.l w . r • a: (,i w 0 V ... .... w JE:-DlrD Ill I a: :r 2Q9<::/l~.

1 -~• a. R• • 20 ~

t.l RL ,; ) 0;,0 OHM

:: - n I-

c; r eit>BV <R£ ,77f!5.V "'>

a: .J t.l a: -.-!--+· "'"

.., .... "" - -" F"REtilUENCY <HZ>


A

X: :I C V

w V z a: 0

"' a. X:

w V a: :I 0 Ill

► a: a: 0 z 0 V w Ill

...

JE-D8-D 2;,iiutil

Rs = '20 I' E0 • -~0 ~av <R£.77~V>

...,

I f•

"" F'RE6lUENCY < HZ >

-.... ,.,.

,..,

,..,

..,

"'

-All curves were generated by a Hewl ettPackard 9815A/9862A programmable ca l culator/plotter. Al 1 ca lculations were e ither derived from or verified by actual measurements . Verified accuracies are on the order of one pen-1 ine width .

1617 NORTH FULLER AVENUE

H OLLYWOOD, CALIFORNIA 90046

P H ONE (213) 876·0059

-

-

wigfi



jenit~HEtr~Jl!f gr.,ners I Price List -20Hz Max Magnetic Far aday Unit Price *

Part Number Description Level In Term Pkg Shield Shield Price Schedule

MICROPHONE INPUT TRANSFORMERS

- - PC Type - Pkg fl 1

JE- 61 lOK- APC 600/150 lOK - 6 2 1 l l 26 - 34 2 JE- 1 lOK-HPC 150 10K - 1 2 1 l 1 30. 55 8

PC Miniature - Pkg f/ 12

JE-653 150 c.T . 3600 - 6 2 12 1 l 34 . 47 22 JE- 1 lOK- F 150 lOK - 4 2 12 l 1 34 . 4 7 22

Wire leads - Pkg Ill

JE- 6110K- A 600/150 10K - 6 1 1 1 1 25 . 40 1 JE- 13K6- C 150 3600 - 1 1 l 1 1 24. 90 6 JE- llOK- C 150 10K - 1 l 1 1 1 24. 90 6 JE-ll5K-E 150 15K - 1 1 l l 1 30- 55 8 JE-l 35K-D 150 35K - 6 1 l 1 1 30. 55 8 - JE- 150K- A 150 SOK - 10 1 l l l 26 - 34 2

- - Wire leads - Pkg f/2

JE- 16- A 150 600 +8 l 2 1 1 41 . 37 26 JE- 13K7-A 150 3750 +8 l 2 l 1 41 - 37 26

MICROPHONE BRIDGING TRANSFORMERS

JE- MB- C 2 windings +2 l I 1 2 25 -09 20 JE- MB-D 3 " +2 1 1 1 3 43. 85 21 JE- MB-E 4 " +11 l 2 I 4 62 , 63 24 JE- MB- EPC 4 " +11 l 14 1 4 65.69 29

DIRECT BOX TRANSFORMERS

JE-DB- D 20K 150 +13 l 1 l 2 26 - 65 7 JE-DB-DPC 20K 150 +13 2 1 1 2 28 - 22 28

ELECTRET MICROPHONE OUTPUT TRANSFORMER

JE- 7552 4K 150 +4 1 11 0 0 15 . 69 18

MAGNETIC HEAD INPUT TRANSFORMER

- JC- 642 l : 9 turns ratio 2 12 l l 34 . 47 22

*See last page for price schedules .

..



20Hz Max Magnetic Far aday Unit Price * Part Nur.iber Description Level I n Terr.i Pkg Shield Shield t'rice Schedule-

LINE INPUT TRANSFORMERS

For low source iapeda nce applicat ions (< 100 ohns) JE- lOKB- B 600/ 150 lOK +18 l 2 1 1 39 . 47 9 JE- 15P- l 600/150 15K +18 1 2 39 . 47 9 JE- l lP- 5 lOK lOK +18 1 2 1 l 43 . 54 11 JE- llSP- 5 lOK/2500 l OK +18 1 2 l 1 45 . 46 23 JE- llP- 5D lOK lOK +18 1 2 1 2 45 . 56 12 JE- llP- 6 600 600 +24 1 3 1 l 48 . 23 13 JE- l l SSP- 6 600/150- 600/150 +24 1 3 1 1 49 , 24 14 JE- 11P- 6D 600 600 +24 1 3 1 2 63 , 67 15 JE- 11- A l OK ! OK +18 1 1 1 0 21 , 94 16 JE- llP- 7 600 600 +18 l 2 1 1 38 , 24 10

For higher source ir.ipedance applications (< 600 ohr.is) JI:.- 6110K- B 600/ 150 lOK +12 1 2 l l 43 . 13 5 JE- 1 lP- l l OK l OK +18 1 1 1 l 29 . 11 32 JE-1 1P- 5M l OK lOK +1 4 1 2 l l 47 , 19 34 JE-1 1SP- 5M lOK/2500 lOK +14 1 2 1 l 33 , 22 42 JE- 11P- 6M 600 600 +18 1 3 1 1 5 1. 14 35 JE- llSSP- 6M 600/150- 600/ 150 +18 l 3 l 1 52 . 1 7 36 JE- llP- 7M 600 600 + 12 l 2 1 1 41. 18 37 JE- 11SSP- 8M 600/150- 600/150 +23 4 20 l l 98. 80 27 JE- l lP- 9 l OK ! OK +27 1 2 l l 66 . 91 43

- - Octal Plug- in Types - -JE- llP- lPN 10K/10K +18 3 15 2 1 40 . 87 33 JE- 11P- 9PN 10K/ 10K +27 3 15 2 1 74,97 44

BRIDGING TRANSFORMERS

JE- lOKB- A lOK 600 +16 1 l l 1 26- 65 7 JE-lOKB - B 25K - 1500/375 +28 l 2 1 39 , 47 9 JE- 15P- l 37 . 5K - 1500/375 +28 l 2 l l 39 . 47 9

OUTPUT TRANSFORMERS - Steel Core - for zero oh□ source ir.ipedance applications

- - PC Type - - Level Out JC- 112- PC 1 : l , l : 2 +24 2 9 0 0 15 , 69 18 JE- DBX 1: 2 +24 2 9 0 0 15 - 69 18 JE- 7103 l : 2 +24 2 17 0 0 15 . 69 18 JE- 112- SPC l : 1 , 1: 2 +27 2 16 0 0 18 , 79 38 JE- 123- SPC l : 1 , l : 2 +27 2 10 0 0 18 . 84 19

- - \.Jire leads - -JE- 1 12- CF 1 : l , 1: 2 +24 l 18 0 0 15 , 30 39 JE- 123-S 1 : 1 , 1: 2 +27 1 4 0 0 1 7. 71 17 JE- 123- SCF 1 : 1, l : 2 +27 1 5 0 0 17. 71 17 JE- 123- SS 1: 1 , l : 2 +27 1 3 1 0 31-25 25 JE- 123- A 1: l , 1: 2, l : 3 +30 1 6 0 0 21. 94 16 JC- 123- ACF l : 1 , 1: 2, 1: 3 +30 l 7 0 0 21, 94 16 JE- 14S- T 1: 4 split +30 l 8 0 0 21 . 94 16

*See las t page for price schedules ,

-



20Hz Max Magne t ic Far aday

- Pa r t Nu□ber Description Level Out Term Pkg Shield Shield

Nickel Core - for highe r source impedance applications

-.

OUTPUT TRANSFORMCRS -

\Ji r e leads JC- 123- SL 1: 1, 1: 2 +22 JE- 123- AL 1: 1, l : 2 , 1: 3 +24 JE- 1 lS- L 1 : 1, 1: 2 +26 JE- 11- T 1 : 1 +22

LOW FREQUENCY CROSSOVER TAPPED INDUCTORS

JE- LX- 600 JE- LX- 2K JE- 682

600 ohn ckt 2 Kohn ckt 7 Hy CT

TERMINATION

l - \Hre leads 2 Printed circuit pins 3 - Octal Plug- in 4 - Solder Terninals

PACKAGE

l - Mu - netal can 2 - Mu- metal can 3 - Mu- metal can 4 - Uncased 5 - Channel frane 6 - Uncased 7 - Channel frane 8 - Uncased 9 - Printed circuit channel frame - upright

10 - Printed circuit bobbin - low profile 11 - Miniature uncased 12 Miniature nu- metal can with PC pins 13 - Dual nested nu- netal cans 14 - Printed circuit - mu- netal can 15 - Octal Plug- in w/ nu- netal can 16 - Printed circuit bobbin - upright 17 Printed circuit bobbin - low profile 18 - Channel fra□e 19 - Uncased 20 - Rectangular mu-□etal can

MAGNETIC SHIELDING

0 - No nagnetic shield 1 - 30 dB nu -metal can 2 - 60 dB mu-netal can


1 l 1 1

1 1

4 7 7

19

3 3 3

L

1- 1/8" 1- 5/16" l - 5/8fl 1- 5/8" 1- 11/16" l - 7/8fl 1- 31/32" 2- 5/8" 1- 7/16" 1- 5/8" 1/2" o. 73" 1- 5/16" 1 . 9" 1- 5/8" L • 7" 1. 6" 2 . l fl 1. 75fl 1 • 5"

0 0 0 0

l

diam . dian . dian . 1- 5/16" 1- 3/8" 1- 9/16" l - 21/32fl 2- 3/16" 1- 1/4" 1- 5/16" 7/16" 0 . 73" dian. l . 6" diam . 1 . 3" l • 3 fl L, 15" l . l fl 1. 75"

FARADAY SHICLDING

0 0 0 0

0 0 0

H

1- 1/16" 1- 9/16" 1- 3/4" 1- 1/8" 1- 1/8" 1- 1/4" 1- 1/4" 1-1/4" l " 1-3/16" 3/8" 1 . l " l - l/4 fl 1 . 26fl 2" l . 4" 1 . 2" 1 • 2" 0 - 76" 2 . 5"

0 - No Faraday shield 1 - 1 Faraday shield 2 - 2 Faraday shields 3 - 3 Faraday shields 4 - 4 Fa r aday shields

Unit Price * Pr ice Schedule

(600 ohns)

21 . 77 27 -42 27 . 42 33 - 22

78. 24 78- 24 72 - 15

41 40 40 42

30 30 31



PRICE SCHEDULES

•--------------- --- --------------- Quantity- - - --------------------------------1-1 9 20- 39 40- 59 60- 79 80- 99 100- 249 250- 499 500- 999 1000-

Sched . No .

1 $ 25 , 40 23 . 63 21 , 97 20 ,44 19 , 21 18 . 06 16 , 97 15 . 96 15 , 00 2 26 , 34 24 , 50 22 ,79 21, 19 19 . 92 18 , 73 17 , 60 16 . 55 15 . 55 3 24 , 78 23 . p5 21 , 44 19 , 94 18 , 74 17 , 62 16 , 56 15 , 5 7 14 . 63 4 30, 24 28 , 13 26 , 16 24 , 33 22 , 87 21.50 20 , 21 19 , 00 17 , 86 5 43 , t3 40 ,1 2 37 , 31 34 , 70 32 , 62 30, 66 28 , 82 27,09 25 , 47 6 24 , 90 23 , 16 21 , 54 20 ,03 18 , 83 17 , 70 16 , 64 15 , 64 14 , 70 7 26 , 65 24 , 79 23 , 05 21.44 20 . 15 18 , 95 17 , 81 16 , 74 15,74 8 30, 55 28 , 42 26 , 43 24 , 58 23 , 10 21. 72 20, 42 19 , 19 18 . 04 9 39 , 47 36 , 71 34 , 14 31 , 75 29 , 85 28 , 06 26 , 37 24 , 79 23 - 30

10 38 , 24 35, 57 33 , 08 30,76 28 . 92 2 7. 18 25 , 55 24 , 02 22 , 58 11 43 , 54 40 , 50 37 , 66 35 , 03 32 ,93 30, 95 29 , 09 27 , 35 25 , 71 12 45 , 56 42 . 38 39 , 41 36, 65 34 , 45 32,39 30 , 44 28 , 62 26,90 13 48, 23 44 , 86 41. 72 38 , 80 36 , 47 34,28 32 , 23 30. 29 28 , 48 14 49,24 45 , 80 42 , 59 39 , 61 37 , 24 35 , 00 32 , 90 30 , 93 29,07 15 63 , 67 5q . 22 55 , 07 51.22 48. 15 45, 26 42 , 54 39 . 99 37 , 59 16 21 . 94 20. 41 18 , 98 17 , 65 16 . 59 15 . 60 14,66 13 , 78 12, 96 17 17 , 71 16 , 48 15 , 32 14 , 25 13 . 40 12 , 59 11,84 11 . 1 3 10 , 46 18 15 , 69 14,60 13, 58 12 , 63 11, 87 11, 16 10, 49 9,86 9, 27 19 18, 84 17 , 53 16-30 15. 16 14, 25 13 . 40 12 . 59 11,84 11. 13 20 25, 09 2 3, 34 21 , 71 20 , 19 18 , 98 17 , 84 16 , 77 15 . 7 6 14,82 21 43 , 85 40 , 79 37 , 93 35 , 28 33, 16 3 l . l 7 29 , 30 27,54 25 , 89 22 34 , 47 32, 06 29 , 82 27 , 73 26 , 07 24,50 23 , 03 21,65 20,35 23 45 , 46 42 , 28 39 , 32 36 , 57 34 , 38 32 , 31 30 , 38 28,55 26 , 84 24 62 . 63 58 , 25 54 , 17 50 , 38 47 , 36 44 , 52 41 , 85 39.34 36,98 -25 31. 25 29 , 07 27 , 03 25 . 14 23 , 63 22. 22 20, 88 19 . 63 18 . 45 26 41, 37 38 , 48 35, 79 33 , 28 31, 28 29 , 41 27,64 25 , 99 24 , 43 27 98, 80 91.89 85 , 46 79 , 48 74 , 71 70 , 23 66 . 01 62 , 05 58 , 33 28 28,22 26 , 25 24 , 41 22 , 70 21 . 34 20 . 06 18 , 86 17,73 16 , 66 29 65, 69 61. 10 56 , 82 52 , 84 49 , 67 46 , 69 43 , 89 41 , 26 38 , 78 30 78, 24 72 , 77 67 , 67 62 , 94 59 , 16 55 , 61 52 , 28 49 . 14 46 , 19 31 72 , 15 67 , 10 62 , 41 58 , 04 54 , 56 51. 28 48 , 21 45 , 32 42,60 32 29 , 11 27 -08 25 , 18 23 , 42 22 . 01 20, 69 19,45 18,29 17 . 19 33 40 , 87 38 , 01 35 . 35 · 32 , 88 30 , 91 29 , 05 27 , 31 25 , 67 24 , 13 34 47 , 19 43 . 89 40 , 82 37 . 96 35_. 69 33 . 54 31 , 53 29 , 64 27 , 86 35 5 1. 14 47 . 57 44 , 24 41 , 14 38 , 67 36, 35 34,17 3 2. 12 30 , 19 36 52 . 17 48 . 52 45 , 13 41.97 39 , 45 37 . 08 34 , 86 32 , 77 30 , 80 37 41 , 18 38 , 30 35 , 62 33 , 13 31. 14 29 , 27 27 , 52 25,87 24 , 31 38 18 , 79 17,48 16 . 26 15 . 12 14 , 21 13,36 12 , 56 11 . 81 l t. 10 39 15 , 30 14 . 23 13 , 24 12 , 31 11.57 10 , 88 10 , 23 9 , 61 9 , 04 40 27 , 42 25 . 51 23 . 72 22 , 06 20 , 74 19 , 49 18 . 32 17 , 22 16 . 19 41 21. 77 20 , 25 18 , 83 17 , 52 16 . 47 15 , 48 14 , 55 13, 68 12 , 86 42 33 , 22 30 , 90 28 , 74 26 , 73 25 . 12 23 , 62 22 . 20 20 . 87 19 , 62 43 66 , 91 62 , 23 57 , 88 53 , 82 50 , 60 47 , 56 44, 7L 42 , 02 39 , 50 44 74 ,97 69,73 64 . 85 60 , 31 56 , 69 53 , 29 50, 09 47 , 09 44 , 26

April 1 , 1979 Prices subject to change without notic e .

Orders not binding until accepted by seller .

jenitQHE!fJJ1~f S?imers .. 1617 NORTH FULLER AVENUE H OLLYWOOD, CALIFO RNIA 9004 6 PHONE (213) 876 -0059



jen!tQHEtr~J!~Gf ~1:mers Price List - 20Hz Max Magnetic Faraday Unit Price*

Part Number Description Level In Term Pkg Shield Shield Price Schedule --MICROPHONE INPUT TRANSFORMERS

- - PC Type - Pkg /11

JE- 6110K- APC 600/150 lOK -6 2 l l l 24 - 61 2 JE- 1 lOK-HPC 150 lOK - 1 2 l l l 28 . 53 8

- - PC Miniature - Pkg /112

JE-653 150 C. T. 3600 - 6 2 12 l l 32- 21 22 JE-llOK-F 150 lOK - 4 2 12 l l 32 . 21 22

- - Wire leads - Pkg #1

JE- 61 lOK- A 600/150 lOK - 6 l l l l 23 . 72 l JE-1 3K6-C 150 3600 -1 l l l l 23 . 26 6 JE- llOK- C 150 lOK - 1 1 l l l 23. 26 6 JE- 1 lSK- E 150 lSK -1 1 l l l 28. 53 8 JE-135K-D 150 35K - 6 1 1 l l 28. 53 8 JE-lSOK- A 150 SOK - 10 1 l l l 24 . 61 2

- - - Wire leads - Pkg 112

JE-16-A 150 600 +8 l 2 l l 38. 65 26 JE- 13K7-A 150 3750 +8 l 2 1 l 38 . 65 26

MOVING COIL CARTRIDGE INPUT TRANSFORMERS

JE- 34K- DX 3 4K - 21 l 13 2 l 34 . 66 27 JE- 44K-DX 40 4K -12 l 13 2 1 34 - 66 27

MICROPHONE BRIDGING TRANSFORMERS

JE-MB- C 2 windings +2 l l l 2 23- 43 20 JE-MB-D 3 " +2 l 1 l 3 40- 96 21 JE-MB- E 4 II +11 l 2 1 4 58. 52 24 JE-MB- EPC 4 " +11 l 14 l 4 61.38 29

DIRECT BOX TRANSFORMERS

JE-DB -D 20K 150 +13 l l l 2 24 - 90 7 JE-DB -DPC 20K 150 +13 2 l l 2 26. 36 28

ELECTRET MICROPHONE OUTPUT TRANSFORMER

JE-7552 4K 150 +4 l 11 0 0 14-65 18 - MAGNETIC HEAD INPUT TRANSFORMER

JE-642 1: 9 turns ratio 2 12 l l 32 . 21 22

.. *See last page for price schedules.



20Hz Max Magnetic Faraday Unit Price* Part Number Description Level In Term Pkg Shield Shield Price Schedule -- -LINE INPUT TRANSFORMERS

- - For low source impedance applications ( < l 00 ohms) JE- I°OKB- B 600/150 lOK +18 1 2 1 1 36 , 87 9 JE- 15P- l 600/150 15K +18 l 2 l 1 36 , 87 9 JE- llP- 5 lOK lOK +18 1 2 1 1 40 , 67 11 JE- l lSP- 5 lOK/2500 lOK +18 1 2 l 1 42, 48 23 JE- 11P- 5D lOK lOK +18 l 2 1 2 42 , 57 12 JE- llP-6 600 600 +24 l 3 l l 45 , 05 13 JE- l lSSP- 6 600/150- 600/150 +24 l 3 1 1 46 . 01 14 JE- l 1P- 6D 600 600 +24 l 3 1 2 59 , 48 15 JE- 11-A lOK lOK +18 1 1 l 0 20. 50 16 JE- llP-7 600 600 +18 1 2 1 l 35 , 72 10

- - For higher source impedance applications(< 600 ohms) JE- 61 10K- B 600/150 lOK +12 1 2 l 1 40, 29 5 JE- llP- 1 lOK l OK +18 1 1 1 1 27 ,18 32 JE- 11P- 5M lOK lOK +14 1 2 l 1 44 , 09 34 JE- l 1SP- 5M lOK/2500 lOK +14 1 2 l 1 45,89 42 JE- l 1P- 6M 600 600 +18 1 3 1 l 4 7. 79 35 JE- 11SSP- 6M 600/150- 600/150 +18 1 3 1 1 48, 75 36 JE- 11P- 7M 600 600 +14 1 2 1 l 38, 46 37 JE- 11SSP-8M 600/150- 600/150 +22 X X 1 1 xx.xx xx

- - Octal Plug- in Type Retrofit pinouts - - -JE- 1 lP- lA lOK/lOK (Ampex) +18 3 15 2 1 35 , 41 33 JE- 1 lP- lB lOK/lOK (Altec) +18 3 15 2 1 35 , 41 33

BRIDGING TRANSFORMERS

JE- lOKB- A lOK 600 +16 l l l 1 24, 90 7 JE- lOKB- B 25K - 1500/375 +28 1 2 1 1 36 , 87 9 JE- l 5P- l 37 , 5K - 1500/375 +28 1 2 1 1 36, 87 9

OUTPUT TRANSFORMERS - Steel Core - for zer o ohm source i~pedance applications

- - PC Type - - Level Out JE- 112- PC 1: 1 , 1: 2 +24 2 9 0 0 14 , 65 18 JE- DBX 1: 2 +24 2 9 0 0 14 , 65 18 JE- 7103 1: 2 +24 2 17 0 0 14 , 65 18 JE- 112- SPC 1: 1, 1: 2 +27 2 16 0 0 17 , 56 38 JE- 123- SPC 1: 1, 1: 2 +27 2 10 0 0 17 , 59 19

- - \Jire leads - -JE- 112- CF l : 1, 1: 2 +24 1 18 0 0 14,29 39 JE- 123- S l : 1, 1: 2 +27 1 4 0 0 16,55 17 JE- 123- SCF l : 1 , 1: 2 +27 1 5 0 0 16 , 55 17 JE- 123-SS l : 1 , 1: 2 +27 1 3 1 0 2 9. 2.0 25 JE- 123-A 1: 1, 1: 2, 1: 3 +30 1 6 0 0 20,50 16 JE- 123- ACF l : 1, 1: 2, l : 3 +30 l 7 0 0 20, 50 16 JE- 14S- T 1: 4 split +30 l 8 0 0 20 . 50 16

*See last page for price schedules ,



-

-

20Hz Max Magnetic Far aday Unit Price* Part Number Description Level Ou t Term Pkg Shield Shield Price Schedule ---

OUTPUT TRANSFORMERS - Nickel Core - for higher source impedance applications (600 ohms)

Wire leads JE- 123- SL l: 1, 1: 2 +22 JE- 123-AL 1: 1, 1: 2, 1: 3 +24 JE- 1 lS -L 1: 1, 1: 2 +26 JE- 11- T l : 1 +22

LOW FREQUENCY CROSSOVER TAPPED INDUCTORS

JE- LX- 600 600 ohr:1 ckt JE- LX- 2K 2 Kohm ckt JE- 682 7 Hy CT

- - - - - - - - - - - - - - - - - - -

TERMINATION

1 - Wire leads 2 - Printed circuit pins 3 - Octal Plug- in

PACKAGE

1 - Mu - metal can 2 - Mu - metal can 3 - Mu- metal can 4 - Uncased 5 - Channel frame 6 - Uncased 7 - Channel frame 8 - Uncased 9 - Printed circuit channel frame - upright

10 - Printed circuit bobbin - low profile 11 - Miniature uncased 12 Miniature mu- metal can with PC pins 13 - Dual nested mu- metal cans 14 - Pr inted circuit - mu- metal can 15 - Octal Plug- in w/ mu- metal can 16 - Pr inted circuit bobbin - upright 17 - Pr inted circuit bobbin - low profile 18 - Channel frame 19 - Uncased

MAGNETIC SHIELDING

0 - No magnetic shield 1 - 30 dB mu-metal can 2 - 60 dB mu-metal can


l 4 l 7 1 7 1 19

1 3 l 3 1 3

L

1- 1/8" 1- 5/16" 1- 5/8" 1-5/8" 1- 11/16" 1- 7/8" 1-31/32" 2- 5/8" 1- 7/16" 1- 5/8" 1/2" o. 73" 1- 5/16" 1. 9" L 4" 1. 7" 1. 6" 2. l " L 75"

0 0 0 0

1 1 1

- - - -

w

diam . diam . diam . 1- 5/16" 1- 3/8" 1- 9/ 16" 1- 21/32" 2- 3/16" 1-1 /4" 1- 5/16" 7/16" o. 73" diam . 1 . 6" daim . 1 . 3" 1 . 3" 1. 15" 1 . l "

FARADAY SHIELDING

0 - No Faraday shiel d 1 - 1 Faraday shield 2 - 2 Faraday shields 3 - 3 Faraday shields 4 - 4 Faraday s hields

0 0 0 0

0 0 0

H

1- 1/ 16" 1- 9/ 16" 1-3/4" 1- 1/8" 1- 1/8" 1- 1/4" 1- 1/4" 1- 1/4" l " 1- 3/16" 3/8" 1 . 1" 1- 1/4" 1- 26" 1. 65" 1 . 4" 1 . 2" 1 . 2" 0 . 76"

20. 33 41 25- 62 40 25. 62 40 31.03 42

73. 12 30 73. 12 30 67 - 42 31

- - - -

wigfi




PRICE SCHEDULES

- - - - - - - - - - - - - - Quantity - - - - - - - - - - - - - - - - -1- 19 20- 39 40-59 60- 79 80- 99 100- 249 250- 499 500-999 1000---Sched .

No . l $ 23 . 72 22 . 06 20. 52 19 . 08 17.94 16.86 15 . 85 14 - 90 14 . 01 2 24. 61 22 . 89 21 . 29 19 . 80 18- 61 17 -50 16 . 45 15.46 14 - 53 3 23. 14 21. 53 20 . 02 18 . 62 17.50 16.45 15 . 46 14 . 54 13. 67 4 28. 24 26. 27 24 . 43 22 . 72 21. 36 20. 08 18. 87 17. 74 16.68 5 40. 29 37 . 47 34 - 85 32 . 41 30. 47 28 , 64 26, 92 25,31 23,79 6 23, 26 21. 64 20 . 12 18 - 71 17.59 16. 54 15 . 54 14.61 13. 74 7 24. 90 23 . 16 21 . 54 20 . 03 18. 83 17 . 70 16 . 64 15. 64 14 . 70 8 28. 53 26. 54 24 - 68 22 . 95 21. 58 20.28 19 . 07 17-92 16 . 85 9 36- 87 34.29 31.89 29.66 27 . 88 26.21 24 . 64 23 . 16 21.77

10 35. 72 33. 22 30.90 28.74 27.01 25.39 23 . 87 22. 44 21.09 11 40. 67 37 . 83 35 - 18 32 . 72 30 - 76 28 - 91 2 7. 18 25 . 55 24. 01 12 42. 57 39 . 60 36 . 82 34 . 25 32 . 19 30. 26 28 . 45 26. 74 25 . 13 13 45 . 05 41 - 90 38- 97 36.24 34. 07 32.02 30 . 10 28.30 26. 60 14 46 . 01 42.79 39 . 80 37 -01 34 . 79 32.71 30 . 74 28. 90 27 . 17 15 59. 48 55. 32 51. 45 47 . 85 44. 98 42. 28 39 . 74 37 . 36 35 . 12 16 20 . 50 19 . 07 17 . 74 16-49 15. 50 14 . 57 13 . 70 12.88 12. 11 17 16 . 55 15.40 14 - 32 13.32 12 . 52 l 1. 77 11 - 06 10- 40 9. 77 18 14. 65 13 . 63 12.68 11 . 79 11 . 08 10. 42 9. 79 9.21 8- 65 19 17. 59 16. 36 15 . 22 14.15 13.30 12.51 11 , 76 11. 05 10. 39 20 23. 43 21. 79 20 . 27 18. 85 17 . 72 16 . 66 15. 66 14. 72 13 . 84 21 40.96 38- 10 35 . 43 32 .95 30.97 29 - 12 27 . 37 25.73 24 . 18 22 32. 21 29- 96 27 - 86 25 - 91 24 - 36 22. 90 21 . 52 20. 23 19 - 02 23 42. 48 39 - 51 36 . 75 34 . 17 32.12 30.20 28. 39 26-68 25 . 08 24 58. 52 54. 43 50. 62 47 . 08 44. 25 41. 60 39 . 10 36-76 34 . 55 25 29. 20 27 . 16 25. 26 23. 49 22. 08 20 . 76 19. 51 18 . 34 17 . 24 26 38. 65 35 . 95 33 . 43 31. 09 29 . 23 27 . 47 25. 83 24 . 28 22- 82 27 34 . 66 32 . 24 29 - 98 27 - 88 26. 21 24 . 64 23. 16 21.77 20. 47 28 26. 36 24 - 52 22.80 21 . 21 19 . 94 18 . 74 17 . 62 16.56 15. 57 29 61. 38 57 . 09 53 . 09 49- 38 46 . 41 43 . 63 41. 01 38.55 36. 24 30 73 - 12 68 . 01 63 - 25 58 - 82 55. 29 51.97 48. 86 45. 92 43. 17 31 67 - 42 62 . 71 58. 32 54 . 23 50. 98 4 7. 92 45- 05 42. 34 39. 80 32 27 . 18 25. 28 23. 51 21. 87 20. 56 19,32 18. 16 17. 07 16. 05 33 35 . 41 32 - 94 30 . 63 28 . 49 26. 78 25. 17 23. 66 22. 24 20- 91 34 44 . 09 41. 01 38 - 14 35 , 47 33 . 34 31. 34 29. 46 27.69 26.03 35 47 . 79 44. 45 41 - 34 38 - 45 36 . 14 33. 97 31-93 30 . 02 28. 22 36 48. 75 45 . 34 42 . 17 39 . 22 36 . 86 34. 65 32. 57 30 - 62 28 , 78 37 38- 46 35 . 77 33 - 27 30 . 94 29.08 27. 34 25 . 70 24 . 16 22. 71 38 17. 56 16. 34 15 - 19 14. 13 13 . 28 12.49 11. 74 11 . 03 10. 37 39 14.29 13- 29 12 . 36 11. 50 10. 81 10. 16 9. 55 8. 98 8- 44 40 25 . 62 23. 83 22 . 16 20.61 19 - 38 18 . 21 l 7. 12 16. 09 15 . 13 41 20 . 33 18 . 91 17.59 16. 36 15. 38 14. 45 13 . 59 12 . 77 12 . 01 42 31 . 03 28- 86 26.84 24 . 96 23. 47 22 . 06 20. 74 19 . 49 18.32

January 1, 1978 Subject to change without notice.

jen!~~HE!r~Hq!f ~i~ers I " 1617 NORTH FULLE R AVENU E H OLLYWOOD , C ALIF O RNIA 90046 PHON E (213) 876-0059


jensen transformer catalog 1977

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