Western electric 104 a schematic

Page 1

Western Elecnic Company
No. l O4-A AMPLIFIER

COMMERCIAL PRODUCTS NO I-5 0
APPARATUS REFERENCE SHEET AMPLIFIER
I04 A
2 - 6 -39

I
THE 104A AMPLIFIER IS A SINGLE STAGE AMPLIFIER INTENDED I
FOR USE AS A PREMIXING 0R L011 LEVEL AMPLIFIER IN SPEECH INPUT
EQUIPHNTS FOR RADIO TELEPHONE BROADCASTING.

W
GAIN ....... . . 2&503 4)
GAIN CONTROL . . NONI.
OPERATES FROM ........ so OUMS, TERMINALS 1-2. x.

250 DEIS, TERHINAIS 1-3.
INTERNAL INPUT IMPEDANCE. OPEN CIRCUIT
OPERATES INTO.... 30 GEMS, TERMINALS 7-8. 500 T0
600 ONES, TERMINAL 7 8: EL WIRE.
INTERNAL OUTPUT IMPEDANCE 30 OR 330 OBIS
OUTPUT POWER.. 60 IICROWATIS (-20 DB)

OUTPUT NOISE.. . APPROX. -IIO DB '«EIGETED, -100 DE U'N- L
WEIGHTED (0 DB - S MU) ,

POWER SUPPLY ....... FIL'T. 0:32 AMP. AT 10:03 v. AC CE DC I
PLATE 0.6 MA AT 375 v. DC. 1

COMPLETE POAER SUFPLY MA! RE OBTAINED FROM FOLLONING EQUIPMENT:
SUPPLIES 104
. x w. Jpn (J m
W W unv' CL A .mww

0147» VIP" um I»

701A S.I. BAY S11

105A AIPLIFI . SIX

IOGA AIIPLIFIER PLUS 221A RETARD. COIL AND A MICOND. SIX

15A RECTIFIER ..... . ........ ............ MLVE
WEE

ONE 2623 VACUUM TUBE Is REQUIREDJIUST a: 0km Emmi)

WW
WEIGHT ..... .. APPROX. 4-3/4 LBS.

. SEE ILLUSTRATION.
. 988A, 8983 OR 9930 MOUNTING PLATES WILL EAEH

MOUNT THREE IOA TIFF AMPLIFIERS.
FINISH.............. CACMIUM.

W
INSTRUCTION BULLETIN NO. 869
NSC-744337 .......... PUBLICATION SCEEMATIC AND HIRING DIAGRAM
ESL-611721, I55. 2 . MANUFACTURING SCUEUATIC AND WIRING DIAGRAM
Sub-61179:). ASSEUELI
ESL-muse. . APPARATUS LIST OF 104A AMPLIFIER AND 9933
MOUNTING PLATE FOR CUSTOMERS USE

ES-uassa . GAIN vs. FREQUENCY OUARAGTERISTIC
ES-VAEIOEIO . POWER OUTPUT VS. TOTAL UARMONIC DISTORTION
PHOTOGRAPHS NOS. 715147_ 73146, 73149

DIIENLSIONS .
MOUNT LNG .

Ala. /04A lMPUF/ER

( fan «was JAMHI 'm)
400 (rm Duran/m4

25:! /NFl/f~ TEKMINILS 1&5 01/er MIN .5an

05 snow FUNDAMENMI.

M424 [Mn/tlsg- Clw- htwmcr (Manda/1n:
(n45. .5521. Ala 4/)

EEJFDNJA' IN DE

(9 25' MIA/r- TERM/NIL! (at fll/fFUr mp: .904
Q 30-: . . ~ 4. . .,

nleuzncv IN cchu nu IICOND

FOR WIRING DIAGRAM AND SCKEMATIC SEE REAR OF THIS SHEET

*86

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Wes/urn Elecnic Company
No. | O4-A AMPLIFIER

WIRING DIAGRAM

PANEL
6ND,

NOTES-
WIRES MARKED A ARE FURMSHED
A5 PART OF APPARAYUS
2 WIRES MARKED B ARE NO IGA. W G. SOLID WIRE
PER K5 -76IL
J, WIRE MARKED C SHALL IE Gk LONG PASSED
TMROUGN HOLE IN PANEL AND IT 5 EN D
EQUIPPED WITH GRID CLIP ITEMIZ ESO<6||795
t WIRE MARKED D SHALL SE OF SUFFICIENY
LENGYN TO REACN TERM'NAI- NO BON TSI. ITS
END FOLDED OVER TAPED AND SECURED YO
TRANSVORMER LEADS AS INDICATED.
WIRES MARKED V'ARE TWIstEo FAIRS.
APPARATUS DESIGNAYIONS ARE FOR REFERENCE
aNLv AND no NOT APPEAR ON APPARAYUS

gm-

SCHEMATIC

2623 YUBE

no 01

RD-WN a

BL

W
mm. W

T1. 2351? INPUT TRANSFORMER
T2. . 1703 OUTPUT TRANSFORMER

01.1, 01.2. . 1410 CONDENSER 0.5-0.5 NR.
(:2. . 229a CONDENSER 1.0 1.
ca... . 230A CONDENSER 0.4 IIF.

0.1 neon) I.R.c. arms BT-l/z

4000 onus ) RESISTANCES

. I.R.C. TYPE Rw-x/z RES. 106 OBIS 1 57-
I.R.C. ms 1m RES. 0.1 noon : 5;
1.11.0. TYPE ETl RES. 0.4 mason

787k