General Electric Co. 143 Schematic

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Manufacturer:General Electric Co. (Old RCA)

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Page 1:

CABINET: Composition _...............,...__,. lflastic Test-Osc_ Test-Osc. Radio Adjust for Maximum
Height .,... _ ..,_,..,.,....._. 9% inches Step Connected Frequency Pointer Meter Reading
Leragth .._.._...... ,_,,.,_...... 1 2% inches to: Setting _
Wi th _.,,..,.,. _ _ _ _,,_,_,_._ 5% inches 1 yn LF _ _
weight (with batteries), . .____,. 11 pounds md in 455 KC 55? KC "f I F "'?"'
series with
POWER SUPPLY: Battery .___,, Eveready No. 753, or equivalent capacitor
AC or DC operation _,,_,,.____ 105~115 volts _
Frequency (on AC) __,_,_ _._.__.__ 6 0 cycles 2 iiieiogrid 455 KC S50 KC %;f;;?E;? of I-F trans'
Power Consumption ___.__._.__,_,., Z5 watts in series
with .05 mf.
OPERATING Broadcast Band. _ _ __,_._._.__, 540-1600 kc 3 Repeat
FREQUENCIES: I-F Amplifier _,_,,..,_____.__._._.___ 455 kc
Step 1
and 2
aximum mi 'watts 5 lndurtively 600 KC 600 KC Iron core of T4 on
coup ed back apron of chassis.
LOUDSPEAKER: Type ._,._ __,.,._____,.,,______ A li-rico PM 'Chassis in cabinet and cabinet back (with loop) closed; remove
Outside Cone Diameter ,.,._.___,. . .4 inches plug buttons for Bdlustment.
Voice Coil Impedance (400 cycles), _ .3.2 ohms
signal should be attenuated so that the output meter reading
ml! R F A ra IT4 ntevflr exceeds % volt. Eonnect Tc capacitor listed in column 2
- mP\ el' >>------~-->>-----~~-'->>->>- o t e alignment chart etween t e "hi h" 'd ofth t t 'l-
COMPLEMENT: Oscillatci-:Converter _.,_,____,_,_ _,___. 1 R5 lator and the point of input specified, g S1 e C es Gsm
I-F Amplifier; _ _ _ ._ ____,.___,.,_ ___. 1 T4 PIECAUTION: If the signal generator is a-c operated, use an iso-
D=f=Cf0f A\1fi1? AmPl\f\EURr ---->>--->>. . _.__ 155 lating transformer between the power supply and the radio
P<>w=r AmPI\5?f ---->>'~>>->>-----~ >>>>---- 3 V4 receiver input. The use of un isolating capacitor is not recom-
mended, as a-c through the capacitor will introduce hum modu-
lation and/or create the possibility 0/ a burned out signal gener-
GENERAL INFCRMATICN a 3 The output meter should be connected across the voice
The Modex 165 portable radio is 8 Fwbtube S"P*=fh?f=f?<1v"? cog texmidis Slietthtigszlhgiment rocedure the volume control
broadcast receiver with a range of 540 to 1600 kc. The power shomd be rotated clockwise to its giaximum position
"mee may be eithcf '?5'l'5 V?Its' 50_q0 CYCIFS a`C' 0' d`c' S. For alignment ofthe oscillator and r-f trimmers, the input
:_Vh?"_: ?"tl?t 'S a5]'"Iabl?i{Th?_;???V?' ';'1I:'I';' ?f;e"ti signal should be inductively coupled to the radio loop antenna
'i?':;' T Sl 3 ery 5?"'?E&. "S mm mg ' "I ?p?".?n ? Tx "fm by connecting a 4-turn, 6-inch diameter loop of bell wire across
?I;;_';?:xt;';;f;oEURf;";s :gt 'gfilssfe ?P?"' '?" "' 'my ??"t'?" the signal generator output terminals, and locate the loop about
' one foot from the radio loop for alignment. The position of the
loop with respect to the radio loop should not be changed during
The left knob turns on the battery, provided that the power Fsilizzise G 8 Jus men S 0 prevcn pass) C "mrs m pea
PNK is well i\'\S?f\?d lH*? the S?Ck?f in UIC Chassis- 6, The antenna loop acquires a different inductance in the
F?r B-C <>r d-C Supply (105~115 vvltu- 50 to 60 Cyde operation) position when the baclr is closed. Therefore. the adjustment of
the same knob switches on the power _when the }>?W?\' PIU! IS the antenna and r-f trimmers has to be made with the back closed,
pulled out of its socket in the chassis and inserted into the house through the two openings on the right side of the cabinet which
0Ufl?f>> normally are closed by plug buttons. After adjustments have
been completed, the two plug buttons have to be put in place
1- Te" OS?lII'"?f with T?"? M?d"\5tl?"~ In order to check circuit performance and facilitate trouble
7>> A'C ?"tP"t M?t?"~ shooting, the measurement of stage gain by means of a vacuum
3- PSP" C8P8Clt0r .QS Mf. voltmeter or similar measuring device is recommended. The gain
4~ I\"S"I*'F?d s?'?Wd"""- _ values listed may have tolerances of 20%. Readings should be
Z $?\:l`f}nK #099 gm TW* OSCIIIBWI' (5?? UX0- taken with low signal input so that the AVC is not eiective.
_ so u ion fans orrnei-_
(I) l>>F STAGE G||N?~
"?C9uk5"?E"5|Al~ IT4 R-F Grid (Pin 6) to IRS Grid (Pin 6) _.._ 12 @ 1000 KC
1. The Alignment Chart gives the alignment procedure with lR5 Grid (Pin 6) to IT4 Grid (Pin 6) _..___,. 18 @ 1000 KC
correct sequence of trimmer adiustments. The chassis must he IT4 Grid (Pin 6) to ISS Diode Plate (Pin 3). .45 @ 455 KC
removed from the cabinet during i-f alignment. The locations of
the i-f and r-I` adjustments are shown in Figure 2. (2) "mo GAIN'
2_ The "low" side of the test oscillator output should be con- .020 volt at 400 cycles across volume control (R13) with con-
nected to the chassis ground; thefhigh" side shouldbeconnected trol set at maximum will give approximately .05 watts output
as indicated in the alignment chart. The test oscillator output across speaker voice coil.
o John F. Rider

Page 2:

General Electric 50
This model nppems on pages 15-1 through _
15-4 of Rztiefs Manual Volume XV. The G2l1?rG1Eleq\r1?:l2? _ Gensr,,1E1ecu.1?|24_135,135
following ,tems should bp added to the Thrs model ls identical mechanically and Model 124 appears on Page; 20.13 ghygugh
parts list: electrically to the late production Model 123 2045 af Rideylr Manual Vamme XX;
S1/mb0lPm>>gNg_ Despriptilm and 124 receivers, which appear on pager Mddels 135 and 136 appear on page; 20-16
R4 RRG-D13 1_0-megohm volume con- 20-13 lhrauyh 20-I5 nf Ridefs Manual My u h 2048 of ,he _,amz Voluma
(J-gl Volume XX. Mddel 125 is identined by its Vfnire speakers have broker, loose fm,"
RJ3050 Tube Socket, miniature maroon color plastic cabinet. The cabinet re~ - - d g Own-5 when
. . _ cabinet mountmgs, or amag
tube socket for 35W4 placement is llsted as: RAU-321, Cabinet, Servicing receiver the speak" can be fe-
rectifier lslastic, for Model 125. I d "Sin ' >> 1 fth ' ' 1
RJX-010 J;i;>ep;z;:k;t giiisnvshere th; mlpuntiggfbossers are broke;
- It is suggeste t at a our osses c_r -
531;-?bly for 35W4 rec- irzneias? Elecinc 123, 124, 125, 135, Worked to use fscrews lforrrrwunrrnrrry Smeg;
' ' th t' n o removing e spea er ma
RHHM 5""p'fFe""?' ig' "'?""" M?d@1= 123- 124- ="<1 125 21>P?='f ?" /"W" regullpihadge breaking df additional bearer.
"JS C" mei- "C - Z0>>13thraugh 20-15 of Ridefr Manual Vol- The ,erm procedure is Outlined as follows:
ume XX. Models 135 and 136 appear on 1_ Cui Off speaker mounting bosses and tile
GBIIBIGI HBCHC 105 P1190 2046 fh'fU"9/Z 2048 of the ?"1"'e flat to the level of the speaker haiile ring.
This model appears on paae.x15-9 through YUIWW- M0115 226 RDDGHYS 0" P0925 2047 2. Drill hole 5/ 16-inch deep ln each boss
15-10 of Rrderb Manual Volume XV. Pm, flwuy/1 20-29 of Nw mmf VH/Mme with #42 or 3/32-inch diameter drill.
;<}XRJX-005 should be changed to read 1/2The grid risistolr, Ul13D~11?, 470?00 v:'"1S- 3, Mount speaker with self-tapping sere;-lgs
lm. Delete part nd. ROP-ooo. Add watt. car on. as een C arse in afrr #4 X ut ineli long, Shakevrvo l/P9 i
part no. UOX-001, cane, replacement prnfluction receivers to URD>>121.1m?s0\1m- catalogue number RHS-044.
speaker cone. This change improved the audio gain.
G?"?m1 Elechic 115' 115W Genem1E1ecu-ic135'l36'226 Genercil Electric 233 Kaiser-Frazer
fizdcfs Manual Volume XVIII. The fol- XX Model ZZ() appears on page; 20.27 through 18136 'of Riders Manual Volume
owing changes have been made In the _ xl/111. Noise in the farrn df rattle can be
arts 1. t lhrough 20 29 of the .rams Volume. _ h _ r -D ecurit or
P is ` Late production receivers use a new type attflbllied "?_ "f'e? anmg ' ef" rastegngs
Delete catalogue numbers and parts RDK- output transformer having 2 tapped Primary. P"'"'fSl??"e ??3"5s' Te. sm '
121 ,md RDK.122_ The tapped section to the B+ lead is con~ Bic- Ume ? 'esetar 'k b and loose
_ nected in series with the power-supply filter 1- Loose "me we m 1 :arts mme
Add the 'UHOWUQS5 resistor at the input Filter capacitor. B+ ton? agdtrxlohggi C0233 aries Q?alvay in
RAGP019 Gflllei for Modffl H5 md ripple current through this winding is out of "mms B E ' b ad
115W Phase with ripple current to the receiver aheht;'?"i ??";;?;lesl;afirg?1i;? fr? irprihe
RDK.15o Knob and bezel, brown. for tubes, thus producing bucking voltage and S lgtmf ru;bP'
Model 115 reducing hum. The transformer leads are 3? If the srraft asqembly seems more or
RDK-151 Knob and bezel, white, for connected as follows: yellow to input filter ' >> `- h ~ll ?-
Model nsw, capacitor, red td filter resistor, blue to plate r?';'f;lS gf' frrgfrf
of input tube, and secondary leads to speaker rragrrc or cambrrc tubing) may be slipped
voice coil. d ~ t th b sh.
General Electric us, us rin new transformer, catalogue nnnrar ix' '??r?"'jf?H"S????ilfaaineiiidilraeiitiing
These modelsappear on pagesly-8 through RT0'073i will be CHf\'iEURd in YEURPlHCEURm'?l1f ` h- ' t ?_r1_
?910 of Riiierk Murrlualli/'gulne ZUJI. This ftoclc?n Dlalgergfogge ;riigirl{a1l?:a(r;;g 1r;od:\}; ;?dV?1.ii-atignaiilrfhenhorgen whichl is rtrt
? ?WU1S 0 BDEES 5 OU E IDB 9 ill l E 'On 'sms ' '_ behind the case instrument pane gri e
PENS list- RLC001 81100111 be changed to Models 135. 136. and 226, respectively. muses it buzz sound when loose. The
RLC-061, T4, coil, oscillator coil. RAY-054 screen may be sliimmecl at its four cor-
should be Ravcst. _ by ~, "min
General Electric 141, 143 "els W Sf" ' 'Ze ' s.m? _ g' _ ,
Add: A Instability on the high end df the broad- _Suggestions for improving circuit and
RAV056 Cabinet, Model 119 (oak) Cast band might be Caused by an oscglr pick-up noise are as follows. V
RDK-037 Knob plain fawn colored - - ~ ~ 1. The former condition can be improved
RDK-040 Knob: withinrrow, lawn col- iigo?idiriiiggqlhipfilhidiisiigi vylihidnctiegigtcigxggg by antenna selection and careful peaking
"ed _ corrected by replacing the coupling winding ?? _ the antenm t"m'l'er to 'unease len'
RHH004 Snapfastener, holds cabinet, with 3 Capacitor C15 of rhe value 56 "Mfr sltivity and_ reduce nolse._For _rrietrgpolitsn
connects the "high" side of the tuning capacl- I th r 93 inches' is recommended
G-SDBIUI Each-lc 123, 124 tor CZ with the oscillator grid, pin 4, of the ggllgrenroor th? antenna trimmer is rrrr_
These nmdels "mic" On Pav" 2043 tube VI' IRS' - >> -poixiiiit and should not he overlooked.
ggggugg 2f?5 fff Rye* "?g>>qgr'bV?1"m= 322211?{'?'?fr"?,?'n.?????5w'?l;"??r;'rj?r;"; Evan inttiinnn naaiti be ad
in the r?D1:C2?nv;i1Iigp;r?;1i;i.sIi;`in Rig???i?? gf oscillator coil, JRLC-101. This item ri- igirfzffggbiggmjr;rf;??;';??;';'prf?fn?r?2fy T;
is a metal dial scale, tan color, with red and PIHCCS C011 f?\`m?\'1Y C3f3l0E1lEURC\ RL0089- 7 1 1 t` t >>
lzhite agures' Lat" Pf?d"?fi?" '???l"e"5 "se The hinge used in these receivers can easily xllsiiiiSfoanlilawiithn;h'i)gnn?p?\iilyin?Xf;'%`
if sam? typ; 5Ca?r;;%p; fm' colfx' The be removed and replaced in the plastic cabinet cd. Tnnerin one' of the \V9ak9S? SLHUUTIS
3." Sea e' CH ' "?' . ` 9 ' 'S gold "1 Color' or cover by the application of heat. To re- iii HDDTOXIIHMEIY 1.200 kc, pr Deal' the
Wlth bmw" and Whlfe Hsures move the hinge fmm the bgck Cover 0, higher-frequency end of the dial scale, Ad-
beTh?h f?"?"{'"g ?"'"'?g"? """'b?" IW" cabinet proper, heat the hinge at the lialf td iusttrimmer f9r mirimw "Diss level and
r3;"r?5a;g?fi; Ulf;-127 5rl;'?"l';'?ad U?D` be removed from the cabinet with a solder- m11XI:Im""' "lusty 0" 5'""?" 'fed fm' ies"
. . esxs or, _ mego ms, w,car on; - - - 2. oise pic -up may come rom vginous
RAU-037 should read RAU-307, Cabinet, ;"}gtKgn??:;h$gir?;a}r;1;:f?';?rr;:n?SC;';T sources, chiefly frdni irnitinntirdiitr of
Model 124 Plame cabmet (ivory) Since the cabinet plastic softens at a rela- the Ca; Thee '?';3aTr;'?;'g;'Z0F'::Etgs';?l;??
_ tively low temperature, it will be unnecessary S" '"" "ms . . ~ - _
General Elecmg 303 to apply the heat very longr To replace the be checked. To eliminate wheel stntichrrx
This model ap ears on pages 15-57 thmugh ' < 4 ~ 55141 21b0"EUR V1 0\1l10@ of powdered SNP lie
_ P hinge into the new unit, first start the hinge _
1539 of Rhdefs Manual Vulume XV' The into the slotted recess in the plastic then through me valve of all four ure tubes'
symb?l fm RSW0191 switch' tone mmm] heat the hin e with the solderin iroh and This Wm provide a grcfund leakay path
dwitdli, should read S4. Stock np. Ri/lx- gently push firehinge rm rms g to dampen static rrd1=1f\?r>>-
013 should be changed to read stock no. '
? John F. Rider

Page 3:

,,,, ,, Mug The rectrfter assembly RF}\ 004 \s o
Model 1000 M IS srmrlar to Models 1002 F
1003 M and 1004 B and uses a m fm radro
Gamble Slroqmo 43 7661 43 7852
Model 43 7661 rs the same as Model 43 7660
except that the 7661 uses a blond cabmet
Model 43 7852 1s thc same as Model 43 7851
except that xt uses a blond cabmet
Gamble Skoqmc 43 8101 165 197
Model 165 rs the same as Model 94RA3l
43 8115A Model 197 rs the same as Model
94RA3l 43 8ll5B Model 197U rs the same
as Model 94RA3l 43 8116A Model 43 8101
as electrically the same as Models 94RA31 43
8115A 811513 and 811QA
Model 43 9341A is the same as Model
Gamble skoqma 941154-43-81291
94RA4 43 arson a4nA44as15nn
Model 94RA4 43-8129A rs the sarne as
and 94RA4 43 Sl30B are the same as Models
4?e8130A and 43 8130B respectively Model
94RA4 43 8131A rs the same as Model 43
8131A Model 94RA4 43 813113 rs the same
as Model 43 813113 Model 94RA4>-43 8132A
rs the same as Model 94RA4 43 8131A except
that rt employs a maroon cabxnet
Gamble Slrogmo 94RA33 43 8135
The 94RA33 43 B135 rs the same as Models
94RA33 43 81309: and 94R./X33-43 813lC ex
cept for the rhtlferences mentioned below The
physrcal drtterence rs the cabmet larger drum
on the tunrng gang speaker bracket dral glass
dial bracket and power cord stram relref The
parts lrst for Model 94RA33 43 S135 rs the
same as that for the 8130C and 8131C except
for the followmg parts
Tunmg gang
Dnl bracket
our gnu
cn>.n=< walnut
General Electric P15
To further clarrfy the rdentrty of the three
spmdles for the record speeds for which they
are to be used the followrng descrrptrons have
been added to the Parts Lrst for record
changer P15 RMU 060 Spmdle offset
sprndle for 7 lnch 33 1/3 rpm records RM\
162 Sprndle for 10 or 12 mch 33 1/3 or 78 rpm
records RMX 163 Spmdle for 7 mch 45 rpm
General Electnc 145
In late productrons, resrstors R13 and R14
have been eomlxmed mto one tapped resrstor,
RZ5A and R2513 'lhrs new resistor ls
mounted rn place of R14 The catalogue num
ber for R25 rs RRW 047 R2sA .S 1000
ohms and should be wrred m place of R14
RZSB rs 1300 ohms and should be wrred
\n place of R13
Late productron Models 145 have an auto
matxc shutoff when the cabmet front rs
closed New parts for these models are mter
changeable and wrll he carrred m replacement
stock rn place of the ongmal early productron
rtems as shown below
Escut ron replaces RDE054
Knob and knob clrp replaces RDK 149
Cabmer from cover repllces RAO055
Nmnzplxfe md auch wrth 2 amd mount
for maroon or wlnre cihrnets
Nnmeplnte and arch with 3 :md mount
for maroon or whlre Clhrntu
Name lim and citclt with 5 stud mmm!
for town cnbmer
Lead fdentt/icutron /or cermmc calmcrtor
sectron ceramrc capacrtor catalogue number
RCW 3015 rs added to and tn capaertor
termmal xdentrflcatron of C9 C10 C11 and
General Electric S4 $5
Late productxon receivers mcorporate a hel
rcal sprrng rn the clock mechanrsm whrch pro
vldes a more posmve tnp action to the swxtch
contact assembly when operating the sleep
control Farlure of swxtch contacts to open
may he due to the mcomplete travel oi the
sleep control gear segment and cam assembly
after sts release by the segment gars drive
pinxon Normally the sprmg actxon of the
swatch contacts through the sleep control
swrtch lever should be suticrent to allow sleep
control cam and gear segment to sprrng out
wnfrd completely after rt becomes disengaged
from rts prmon drrve gear However, rf bmd
mg or posxtnon of control parts results rn fall
ure of segment gear and cam to swung com
pletely outward properly releasrng swntch
control lever and contacts the addmon of the
booster sprung (catalogue no RMS 203) will
provide the additional tensrou to correct seg
ment gear and cam operatton
To mstall the booster sprang, remove the
case and draw the clock mechamsm forward
'rom the front oi the radro cabmet just far
enough to permit rnstallatron of the booster
sprang The accompanymg tllustratron shows
the posrtron of the booster spring as vrewed
from the rear of the clock mechamsm One
end of the sprmg rs fastened to the cam stud
'the other end to the brass front plate stud
I A """"' Rear mew of clock mzchamsm
m General Electnc Model:
*Q _Q of banner :pr-mg
f>> r not no v nrt sm
General Electnc B0 62 64 65 56 67
The stock rtem RAB 054 Cabmet back and
loop rs no longer avarlable and Stock No
RAB 097 Cabrnet back and loop rs substx
tuted rn lts place For those recenvers pro
duced employmg RAB 054 wrth connecnons
made to the pnmary antenna wmdmg the
black ware to chassrs ground rs removed when
RAB 097 rs substrtuted for replacement
General Electric 123 124 125
A self tappmg screw #4 x Mt mch Cat
No RHS 044 Shakerproof type 25, has been
added to the Parts Lxst for the above models
Cabinets of later productxon recewers were
tapped lor these screws to mount the loud
speaker rn hen of the 'lmnerman chp
RHM 061 used rn earher speaker mountmgs
General Electru: 140
longu stocked rrvetul to a \\\ouutn\g hr rcket
lhe new rettlher may he screw moullted tu
the url mul rectthcr btacket as lollows
remo\e mres at the connectmg lugs of tl\e
old rcctrher usmg screwdr wer blade hetween
plates of rectther to be removed pry plates
ol? from rectxher mountmg bracket assemble
meh long screw through rectrher and bracket
hole and tastcn using lock \va~hcr and nut
leplntt nrre tunntcnons tn new rectrher
General Electnc 143
In late productron receivers C5 was changed
to 025 pf 200 volts Cat No UCC 050 Thrs
change was made to reduce regeneratxon >>wh\cl1
restrlted rn unstable operat\on
General Electnc 165
A tube shreld has been added m late pro
ductron reeervers to the ISS tube rmprovmg
nts stabrhty This rtem ls carrred rn parts
replacement stock at RHS 010
General Electnc 218 2181-1
A 15 000 ohm % watt resrstor R33 has been
added between the hxgh srde of the volume
control and the arm of the band swrtch S1D
`I`hrs improves recerver stabxlnty The follow
mg changes should be made m the Parts Lrsts
for these models
Delete swek No RLI 084 Add RLI oss
Choke f m antenna (LZ) used ln 218 only
Add URD 077 Resistor 15000 ohms % w
Stock No RLI 088 has been deleted from
the Parts List and Stock No R1 I 084 Coal
im antenna choke 1.2 added m :ts place
General Elecmc 402
R2 shown connected to B+ should cross
ogr the vertrcal B+ lead to pm 6 of V2 and
a. dot connectlon should be drawn at the ver
trcal B lead to om 2
General Electric 595 503 507 508
Catalogue :tems RWL 009 and RWL 015
should be deleted from the Parts Lrst and re
placed by the iollowmg stems RWL 025
Cord power cord and plug (brown, heavy
duty type) for Models 505 507, 503 RWL
026 Cord power cord and plug (ivory heavy
duty type) for Model 506
Model 43>>8129A_ Models 94RA4-43-8130A The accompanyingmustr?don of the four new rectiher to bracket, using a #6-32 x 1
? John F. Rider

Page 4:

General Electric 143 General Electric 200 Serles
The connection between terminal number 4 These models appear on pages 18-1.9 _
of the 2nd of trsrrsforroor to the s,zoo_olrm through 18.20 oy Rider! Manual Volume M_IT,'f;'f;'(?fi';1l;l`;l_l;l;fe as Model AMP
resistor RZ is connected at the intersection XVIII. The following changes should be 101A which appears on pages 174 and N?
with the B+ line. Late production receivers added to the parts list: _ r
, , V . . of Rzclcfs Manual Volume XVII, except
incorporate the following changes ln order to RHM002 Chlir fl" m?"'1'>>U18 5Pe8kEl' fm. the follhwin chan e in B is V I e
paper capacitor has heen added in parallel with RHM-004 Clip, dugl scale mmmtms clip Qef- Pg" _ _
resistor R9, This capacitor has a reference f?l1 PIN-WC 9353199 111013215 Af- 50- D9S'*'HP'1?"
rrrrrrrlrrr of C16 and stoolr number Ucc_0-ts. RHM005 Clip. dial scale mountins clip 0 2?0129G4 Cavwlofr pf-vert 003 uf,
Capacitor cs has been Changed to s o.1_rf, for wood cabinet models 400 v~
200-volt capacitor, stock number UCC-050. _
The following parts lrsro been added to ,Mg 0, Rwe,.??,,mml Qhgume XV Mix Model 04WGj672 appears on woes 12-S1
provide replacement ofthe battery cover plate el 250 a em on a es 166 Umm A 162; 'Wi 19459 U! Rldefs Mdmwl Vvllww XII-
and assembly Dam; DJ. Ridgl; Mnnug "Volume XV? Add Models A and B are the same as that
ai. No. norrrrprrorr ' _ model which appears in Volume XII.
?HEUR'ggg EW" .?2iEUR'bPi:'? ?"1V _ R'EC'll03' 'lnlellllla loop Connector "HP l? Models C D and E are similar to Model
?_Yl_%}O&;J_ hw/sg, "h;_l3a_h?fr;l fiipuiivfilg the parts llsls or these molleli 04WG-672 with the following exceptions.
l\ll_o?v lrr;il?tIr, losolsfgfnihriluml "ash" General Electric 856 Model C emplws ll plugqll leslllml' Rls
RMC-037 Clip. battery slip h_ d 1 and RIZ. The values remain the same as
RM5'lB? 5P""f~ "A" \'="=fY =P""e- T ls' mo 9 appeals on pug" 1840 in the earlier models Model D ein lo a
_ _ _ through 18-44 of Ridefs Manual Volume _ _ ' . .. P y
The f01l0WlllE miscellaneous Diffi have XVIII R __ Rm __ b __ d the plug-ln resistor and, ln addltlon,| new
Been added. Most of these parts are required f ?zo in otha _ a?ao eel? C ings oscillator coil and 2 section dry eleo
because of the addition of brown and white lqlglq C; "gg hgh ?7 ? ms' A W' trolytio capacitor. In Model E the loop
cabinets. ` ?' ' ` ' ` ' antenna assembly has been redesigned.
. over, a eel/sr u ire _ _ odric _ _ _
hells l5""l"9?3k < l > s r Go 1192 521 92528
lli.Qi'i.i`2i 553552 i?Zl? 'flilr 'lEURf?`????.r> soo.o.o._ These models arollrosarrrr as Models 912-523, M?l?*'1?m?f!{ Wfnd U5WG-2745A
Chg; R/\C~0f'I __ _ __ ____ __ This model ls the same as Model 94\VG-
RAGM9 'hi:';;` ml" ? Y ( '?"'") l " 'l g2_324_ 92_525_ 92_526_ 2745A. To reduce regeneration in later pro-
RAC-n7c Corner, main body (white) rneluder duction receivers, the following changes were
roroorr ooh? os.. <..r...o .Maas B. r. Goodrich sa_1n9. 93-110, sa_111 },T;?"?' PM
RAOu__ _______;\g= _mm _"__ (bmW__) _"duh" 9__'l_l6l?se9r?ll;l2l_;ls are the same as Models 93-104, No. No. .gzimghon
RACM6 &,.,,,, imp cm, tbmwnl B _ cle mms shgdrzgf rsrsrrrrs roosrrror
_l?S;fl;l_I? K??b_=?:?;_? Zgnml knob . F. Goodrich 93 112. S3-l 13 tx-av asm; s,?;uo_olrm, o,s_w osrlsorr rorlssor.
, nr-lR>>oo4 no/rr, tooo room rlvst These models are thc same as Models 93-107 The remwf realms :he rf~>>
nl-rY_ooo Handle, roblaor loodlr and 93405 solorod olrole l.-s rrr doo more
r _ l:1_;E_E0 :Ili __ 9 end of cord to the sprlng. Cut off any
where the cord fastens to the prong in the been chalfsld Ei' h gg hs S 2264 73 excess Sffmllr
moldedplug. An appreciable increaseinduraf ohm Thgeall l?m*_h'2 0 ms l'? '
tion of operation from a fully charged bat- th gs" lib oysb e ileell cllllent ?l The C0lIlP011EURlJf Darts are the Same as
tery ooo be effected in the following rrrso_ weelim. Q' e '? _P S"."?@'%"'??"EUR 'md these lisled on page may of Riderls Val~
ner, realizing, however, that some degree of vMi0usm6;;7,;l"la long ln sam etweell "me XV, except f0l` 51059 listed lJEURl0W.
performance is sacrificed in regard to sen- ` _
sitivity and power output. Replace power- a' FQ hal; been lldgedlm Fatal' 1152! ` ia" D . .
supply filter resistor R17 (L500 Ohms) with e o eh sec , rear, wa er ead that Co. o. escrlplzan
a 4_70aohm_ Lwatty carbon resistmh This goes to t e phonograph receptacle. -15 B67204 0.20 /lf, 200 v, tubular
change should be made only when were 4. Capacitor C30 ls now connected to the C-16 D67104 0.10 Af, 400 v, tubular
is a demand for longer duration of opera- vallable reslsml' Rza' lllslelld ?l tc' O18 D67lo2 0001 *ll-' 400 Y' tubular
tion to one battery chm_ge_ ground. C-19 17Al23 1,0-12 api, trimmer.
? John F. Rider

Page 5:

Ll Y 7 1 j 1 7 47 nn s , 7 .5.;_g'L 3, 7 R1 R|5 | 7 mo RED
9+ soy a+9ov
. . TOP V\EW R 7
(C)John F. Rider

Page 6:

D-C voltage developed across oscillator grid resistor (R9)
averages -8 volts at 1000 kc with respect to B -.
(4) HUM
The hum voltage measured at the primary of the output trans-
former should not exceed 0.4 volts. This measurement should
be made with an a-c voltmeter of a sensitivity of 20,000 ohm /volt
in series with .5 mf. capacitor.
Figure 4 shows voltages from all tube pins to B>>. Voltage
readings much lower than those specified may help localize de-
fective components or tubes.
This multiple capacitor unit is of the ceramic capacitor type
and contains five capacitors C11A, B, C, D and CIZ, This unit,
RCW-3015, is illustrated in Figure S for lead identification. If
during service the ceramic capacitor unit is found to be defective,
the entire unit may be replaced by the identical part, RCW-
3015, or the defected section may be located and disconnected
from the receiver circuit and the equivalent single components
used in its place.
E ` ' GIG It
4s5Kc 455Kc one L5
Fig. 2. Tubs and Trimmer Location (Model 165)
|?'] eowom vlaw or CHASSIS
(C)John F. Rider

Page 7:

ro ans or V4 CHU ml 2
Flg. 5. Csnnnilons for Cepcellsr RCW-30'I5(K6lJI2l)
ck. N?. sy-"mx Dexcription cn. Na. symbol Ducription .
ucc-on cn cznmcxron-_wa mf., soo v., paper Rnxmas xnos-v?\um? nr nmi>>\??>s:s cu cAPAcx'ro R-.os mr., soo v., paper Rnsma scum.-Dm scale
tr?\y\il: RHC~0l? CLIP--Clip for oicillltox' coil
uor-451 Ls; spxnxczn-4>>am\ PM RHC-016 HAIRPIN con-an
' bon Rx-m_oos Rxvzr-Tumlu rim for aw: mn?? \/
URD-137 mv RESISTOR-4.7 mg., w., carbon mac ??p.?am?
URI-013 R1 RESISTOR--33 0\ll'l\l, 1 1/4, CLrb0l\ R]S-100 SOCKET-Tub! IQCKCQ. fd! IRS t\|bEUR
bon nys-ns socxzr-Tube mm an rn tube
SFICIALIIID llruclnlnf Mus ?'l??Q,?, L* '5EUR?'{:"??P.c.. cl?""""'
musm snzmo cm-c - of umm bun
:uu-axn Assnmszv-c.ban?? ...muy sm, B trol, soo ooo cum md twitch
scams cz A, B, c/nmcrrox-4a mf.-40 mf., xso v., Rnw.oz1 R3 nzsxsroiz-:soo nhm., xo w.
cn former \_/
nncmz mu. cons-Ron of zs y..-a. nw|._oos coma-x>>?w?r cord
(C)John F. Rider

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