Western electric 80 a schematic

Page 1

Wemm Beanie Compaq
No.80-A AMPLIFIER

COMMERCIAL PRODUCTS NO l-l5
APPARATUS REFERENCE SHEET AMPLIFIER
80A 8. B
I2-8-38

WEB
51E :"Hil SHE Hm INS
mun... ....A31.4 m3 1 x DB
OPERATES FROM ..... .30 was

INTERNAL
INPUT IKPEDANCE. ..HIC~R [OPEN TRANSFORMER)
OPERATES INTO... ..200 CR 50 GUNS
INTERNAL
OUTPUT IXPEDANCE
OUTPUT POnER. . . . .

..200 OR 50 DUES

APPROX. - 6 DE (0 LLVAL - .005

II'ATTS)

OUTPUT NOISE.......APP1\OK. - 110 DB 01; DC FILA-
MNTQ (UN.4..IGrIT.uD)

..200 V. DC FCR PLATA' PUlmR.
10 T0 12 '7. AC (it. DC FOR
FILALIKNTS. A CDHLETE IUZFER
SUPPLY LIAY BIS OBTAINED FROM
AN 86 OR 92 TYPE AWLIFIER.
A 716A APPARATUS UNIT IS Rh-
QUIRILD IN SUCH CADE- FOR FIL-
TERING TEE PLATE bUPPLY.

GAIN CONTROL. . . . . . .NONE

mm
mm 262A mum: TUE}. IS REQUIRED.
ngmm
..APPROX. 16 POUNDS
19-5/32 x 3-13/32
..7-5/1e

STD. 19" RELAY RACK
BLACK JAPAN

POWER SUPPLY. .

MOUNTING.
FINISH .....

PERI DEE
INSTRUCTION BULLETIN N0. 638 0 80A AMPLIFIER
BSD-341102 - ASSENBL!

ESQ-341114 < SCUEIJATIC (BOA)

ESQ-341115 - WIRING DIAGRAN (80A)

ESO>343460 - SCEENATIC (80B)

BSD-343461 - WIRING DIAGRAM (BOB)

89E 6] HELEN

NOTE: THE BOB AMPLIFIER IS TRIn SAME AS THE 80A
III-TUNER RECEIPT THAT IT USES THE. 2643
INSTEAD OF THE 264A INPUT TRANSFORMER AND
THEREFORE OPERATES FRON 200 OR 50 ONES
INSTLAD OF FROM 30 OHIS.

GAIN rIEouEch CHARACTERISTIC

FOR WIRING DIAGRAM AND SCHEMATIC SEE REAR OF THIS SMEET

58-

Page 2

Wm Electric Compauy
No.80-A AMPLIFIER

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SEE NOTES 3.4 L 5 MR 250mm:
,7, NOTES: VI zen VACUUM Tue:

I. WHEN NEGATIVE or FIL, BATT Is GROUNDED
5° STRAP "-zoov" To -Izv'AS SHOWN. WHEN
POSITIVE Is GROUNDED STRAP '-200v'To'+I2v.'
FOR A.C.OPERATION STRAP -200V'T0 MID. FL."
2. FOR 200" OUTPUT STRAP "Ia-c3 FOR 50
ouTPuT STRAP 'A-B' AND 'c-D'.
3.WHEN USING Two AMPLIFIERS IN CASCADE
.// STRAP FIRST AMPLIFIER FOR 50" OUTPUT AND

MAN 0. .CONNECT 70u SECTION OF R4 ACROSS 'A-D'.

4.WHEN USING THREE AMPLIFIERS IN CASQDE

6 _°/ _ STRAP AND CONNECT FIRST AND SECOND
0 AMPLIFIER OUTPUTS AS IN NOTE 3 ABOVE.
i 5. CAUTION- WHEN EITHER 2 OR 3

AMPLIFIERS ARE USED IN CASCADE SPECIAL
PRECAUTIONS REGARDING OUTPUT LEVEL ARE
NECESSARY. SEE INSTRUCTION BULLETIN.

GND. GND. 10°; :IZV 98; May +zoov

'SP'DENOTES SHIELDED PAIR \SEE NOTE I

,59_