Gamble-Skogmo, Inc. 05RA33-43-8136A Schematic

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Product Information:
Model:05RA33-43-8136A
Manufacturer:Gamble-Skogmo, Inc. (Coronado)

Schematics Content:

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Page 1:

GAMBLE-?(O?MO PAGE 22-7
SPECIFICATIONS
Power Supply II7 voIIs 60 cycle AC, I I7 volis DC, 29 waHs
Frequency Range 535 KC +o |630 KC
lnfermediafe Frequency 455KC
An+enna BuiI+-in Loop
Tuning Variable Capaciry
Speaker 4", P.I\/1. voice coil impedance 3.2 ohms
Power Ouipui 0.8 waif undisiorfed, I.8 waHs maximum
SensiIivi+y 400 uv/m average 'for 50 mi|Iiwah's ouIpuI
SeIecIiviIy 55 KC broad a'I' |000 Iimes, signaI af IOOOKC
Tubes used are as foIIows:
I IZBE6 Osci|IaIor-Converfer 5055 Power Ouipuf
I2AVb or IZAT6 AVC, DeIec+or, and Audio 35W4 Power Recfifier
Y a5w4 sons |2555 O rams
OSC, TRIM
CHASSIS LAYOUT TOP VIEW
(C)John F. Rider

Page 2:

PAGE 22-8 ?_A__MBLE-SKOQMO
MODELS OSRA33-M3-8l36A,
10-120 VOL ne
osc com Lo
(C)John F. Rider

Page 3:

GAMBLE-SKOGMO PAGE 22-9
T MODELS OSRAB3-M3-8136A
ALIGNMENT PROCEDURE
rne lollowing procedure ir for use only by compeIen`I servlcemen having rhe proper' eqnlprnenr,
The .rngnrnenv should be rnsde warn volume conlrol rnuy en, and the enrpnf from me signer generefnr as low as pennble, To prev-en: Avo
eenen from inrerfsrlng Wm. Proper elignrnenn
Wlrh rhe oufpul meler connecfed across !'he voice coil of the speaker, The ourpul me*er_reading for 50 milliwarrs is 0.4 volts, using a
signal which is modulaled 400 e.p.s.
Adlusrl all Irimmers lor maximum oulput Repeal lhe alignment procedure given below as e final chock.
cAUr|oN? rms is an AC/DC receiver, end when aligning me ser ar is necessary ee lsolale me eignel generaror or Ihe receiver frern Ihe
line 'oy use of a Iransformer, or ro place a .2 MFD condenser in each fear lead of rhe signal generaror.
SIGNAL GENERATOR POSITION ADJUST FOR
Dummy OF MAXIMUM
Frequency Anfenna Connecllon Io Radio VARIABLE OUTPUT
455 KC ,l MFD IZBE6 Grid SIaIor VCA Fully Open Tl & T2
|625 KC IZBE6 Grid Sfafor VCA Fully Open VCB
mon KC .I Msn Loosely Coupled +G Leep rnne in Signal eenererer vcA
Canned Iew side ul signal ganeralor fu ennrrnen negalive.
PARTS VALUES FOR T676 GAMBLE'S AC/DC CLIPPER
CIRCUIT COMPONENTS DESCRIPTION VALUE RATING
SYMBOL PART NO,
VCA>>VCB VCTL576 Condenser, 2 gang
Cl C051 Condenser. paper .05 MFD ZOO volls
Cz c|z Condenser, peper _| MFD zoo verve
C3 C026 Condenser, paper .02 MFD 600 volls
C4>>C6-C7 C0056 Condenser, paper .005 MFD 600 volls
CQ C40-20-I5 Condenser, electrolytic Z0 MFD |50 volts
C10 C054 Condenser, paper .05 MED 400 volls
R2 R39|.5 Reslsror 390 ohm I/2 wall'
Rl moss Resislor | megohm l/1 well*
R4 RIO6.5 Resizror ro rnegehrn I/2 wen
R5.R9 R474.5 Resisror 470K ohm I/2 wall
R6 R|2l,5 Reslslor :zo ohm V, wen
R7 RI03I Resisror IOI( ohm I wall'
RB RIOZI Reslsfor |000 ohm I wall
5| CRI Diode Hlfer unir 2)<|00 MMFD.-WI( ohm
VR VRT67G Volume conlrol I megohm
LA LT67A Anlenne loop
LO LOT67 Oscillalor coil
T3 E-s|s45-T Oulpul Transformer
volume conrrol
SPI( SPKTb7 4" P.M. speaker
MECHANICAL PARTS
/` PART NO. DESCRIPTION PART NO. DESCRIPTION PART NO. DESCRIPTION
M~ISO| Chassis H4805 Ground lug P-I80lI Cablnel, ivory
M-|807 Chassis cover H-BI644-6 MlnIaIure lube socker P~I704AW Polnrer knob, walnul
H-Ib0I Trimounr %" W-|802 Line cord and plug P-I704AI Pclnler knolz, ivory
H-IB01 Trlmounr V4" SR~3P Sfrain relief P-I704W Round knob, welnur
TIII-3|-B l_F. mounIing clip P-IBOIW Cablnel, welnul P-|704| Round knob, ivory
(C)John F. Rider

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