General Electric Co. 180 Schematic

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Product Information:
Model:180
Manufacturer:General Electric Co. (Old RCA)

Schematics Content:

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Page 1:

GE PAGE 16~1
GENERAL ELECTRIC CO. MODEL 180
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SPEAKER
PART NO, sYMBoL DESCRIPTION PART No. sYMBoL DESCRIPTION
UNIVERSAL REPLACEMENT PARTS SPECIALIZED REPLACEMENT PARTS
Ucc~ou I ca, a, no CAPACITOR-.os fnfd., zoo v., paper RAB-5001 EACKACahinet back
UCC>>037 can CAPACITOR-.aaa mfa., son v., pap" RCE-sum c\7 CAPACITOR-8 mm., 1su v., electrolylir
uccroso c1s, I9 CAPACITOR-.nos mid., ooo v., paper RC1-.som CsA, sn cAPAcrroR~'rnning condenser
ucc-040 cm CAPACITOR~.01 mId,, soo v., paper RcU.suo2 cz CAPACITOR-4.7 mmf,, mica
UCU-\023 C6, 18 CAPACITOR-100 mmf., mica RDC-5001 CORD-Drive 130;-d
uoP~s19 sp SPEAKER-5% an. permanent magnet RDE-soox ESCUTCHEON-Dial escutchenn nsnfnnmy
UOX-001 coNEvR?p1nn?n1nn? speaker none RDF-soox WASHER~Fclt wnshu for knobs
URD-031 R12 Rssxsrok-330 ohm, wg, w., carbon Rox-soon KNOB-volume or tuning knob
URD-065 R4 REs1s'roR-41nn nhm, 1/5 w., carbon RUM-som FLAG-on.on indicator ang
URD>>073 R1 RESISTOR-10,000 nnnn, vs, w,, carhnn RDP-5001 POINTER~P!asKic dial nnfnm
uRD.os9 R5 RESIS'I`ORf47,0U0 uhm, vs, w., carbon Row-som GLASS-Dial glans I
URD-ms R-* R|as1s'roR-220,000 nhm,1,? w., carbon Rnx_soo1 BRACKET-Dinx bracket nnn pulley
URD-113 R7 REs1sToR>>41o,ooo ohm, 1,3 w., mnon _ assembly .
URD-X21 RHI 11 H5315-p0R_1 mg" 14, WM Umm, R1-xc-soox CLXP-OH-On indicator retaining nun |
URD433 R2 RESIS-A-0R_3_3 meg), % ,,,__ who" R_1s.5uo1 SOCKET-Octal tube sncm
URD-1 37 Rb Rygsys-mR~4_7 meg, 1,5 ,,,_, when Rjs-som socKE'r-speaker socket
URD445 no RESISTORHO mm' % ,L_ when RLA-S001 ~ -rg con.~An?ennn mn
RMB.sou1 nEAR1NG~Din1 drive snnn nnnnnnann
RRC-som Rs. ss VOLUME coN-rRo|._2 men. vn1_ nnnnnm
and switch
RTL~500l 'rs TRANSFORMER-and i-f transformer
RTL-5002 T4 -rRANsFoRMER-nf i~f transformer
Rwx_ssa1 CABLE ASSEMBLY-Battery cable
RYM-5001 CHART-Dial calibration :nm
ohn F. Rider

Page 2:

PAGE 16-2 GL _
I MODEL 180 GENERAL ELECTRIC CO.
POWER SUPPLY AND REQUIREMENTS:
(1.5 volts "A", 90 volts "B" pack)
| Burgess _ ,.__ _.._...,_.._.., _ _ 17GD60
General ,___ _ _ _ 50 DL-11L
OPERATING FREQUENCIES:
Broadcast Band __.__ _ _ _ 540-1710 kc
I-F Amplifier _ _ _ _ 455 kc
Undistorted _ _ _ _ _ 0.15 watt
Maximum _____ 0.27 wat!
Type ________________._____,___ _ _ _ Alnico P_M_
Outsider Cone Diameter _ _ _ _ _ _ _ _ 6 in.
Voice Coil Impedance (400 cycles) _ _ _ _ 3.2 ohms
TUBE COMPLEMENT:
Oscillator-Converter ._ Type 1A7GT
I-F Amplifier __ __ Type INSGT
Detector-Audio _ __ _ _ Type IHSGT
Power Output ______ ____ ____ _ _ Type SQSGT
ALIGNMENT CHART
'rest Pointer
Step Connect Test Oscillator Setting Adjust For
Oscillator To Setting On Radio Max. Output
1 INSGT IF grid in 455 KC 550 KC lst IF trans.
series with _ps mai. trimmers
2 1A7GT Conv. grid in 455 KC 550 KC znd IF tram.
series with .05 mfd. trimmers
3 ' To Ant. Post through isoo KC 1500 KC C7* (osr.)and
200 mmf. dummy C3 (R-F)
I and to Grd. Poem.
*Rock gang condenser when making mngnmem.
GND ANT
wr TRANS '
Flq. 1. Tube and Trimmer Locaflon
REAR OF CHASSIS
BOTTOM VIEW OF CHASSIS
mensussmenrs uneu on zo,coo arms PER von Musa
\_sv 'A'- sov's' amrsnv PAc\<_ No SIGNAL |NPu1_
Fig. 2. Socket Volfuge Dlagrnm
STAGE GAIN AND VOLTAGE CHECKS
Stage gain measurements by vacuum tube voltmeter or
similar measuring devices may be used to check circuit per-
formance and isolate trouble. The gain values listed may have
tolerances of 20%. Readings taken with low signal input so
that xvc is not effective.
(1) R-F Stage Gains.
Antenna post to lA7GT grid _ __ 6.6 at 1000 kc
1A7GT grid to INSGT grid _ ._____ 46 at 1000 kc
1A7GT grid to INSGT grid _____ 60 at 455 kc
INSGT grid at IHSGT diode plates ______ _ 80 at 455 kc
(2) Audio Gain.
.06 volt at 400 cycles across volume control (R8) with con-
trol set at maximum 'will give approximately .05 watts out~
put across speaker voice coil.
(3) D-C voltage developed across oscillator grid resistor (R2)
averages 7 volts at 1000 kc_
(4) Socket Pin Voltages.
Figure 2 shows voltages from all tube pins to B-_ Voltage
readings much lower than those specified may help localize
defective components or tubes.
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\ voslnon snow
(C)John F. Rider

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