Western Auto Supply Co. 1312 Schematic

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Product Information:
Model:1312
Manufacturer:Western Auto Supply Co. (Truetone)

Schematics Content:

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Page 1:

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WESTERN AUTO SUPPLY CO.

TRUETONE MODEL I3I2

(C)John F. Rider, Publisher

Page 2:

PAGE 6-10 TRUETONE

Circuit Dalia

WESTERN AUTO> SUPPLY CO.

sEvaOE DATA FOR TRUETONE MODEL lalz

lf the .er is badly our uf "librarian uueh the
eurreetlydnt h n the d but not at anothe
r . , . _ ur .to l lt t e mi .ter r unt trimmer u ex i
'n d" R'UI Ch 'he '"'?"""" "9"' '? "mga '"4 'm he alll. condemn trimmer. :ln be relchetr by removing

clltcurr DESCRIPTION

lmrd sr. the 7a Rf r r. Further .rr- lrfrnuurr ...a lrrqurury r _

type tuhr. emi thi-n ren

on thr triodr section of the 75 tube where l.rnplit'reetitnr nuker

plifred irl the I.F.'utaue,.urinu l 7G

p The maduleted drup uernn rerirtor No. 7 ie filtered and ag-
plied ta thr- "tidr of the 78 RF, und LF. tuher tn provide A.V. -

POWER SUPPLY PROTECTIVE 'RESISTOR

Thr filter lynn-nr und thr- reetifier tub- eri- pieteeteul u t
breakdown during the warming-up period by thr- Clober re or
crm-rind urrun the mul. run-"r "mud-ry ,l rhr ,r-rwrr
trnnrirlrmer (No. IZ in the circult dilurlm). Thi: reuirtot
drupr npidly in rurntum- .r the voltage eemrr- it rirer. in
thu it uct- " u loud uri the paw" tr-nrlormer during the
"mum ,mini .ml tmp. rl" "in", below an* 4...," ,utr-i
until the lube. ure heated und nk' their nerrhel eurrent, Because
of itr uniqur voltage charactrrilliet. thr' Club-r 'rerietor cnn'rlot
hr- tr-rtrd with .n ordinary ehrnmeter. einer it will .how e re-

CALIBRATION AND ALIGNMENT

A mud modulrlr-d :mill-tor .rid u remilivr- output meter
.ru "fur-...ry for proper eu ihrutiou und u iunmerrrrr l e
~~ ni thi. ree ver. Tl".- ?utput ol the `rneil|ut?r
,urlrlrlr r.. Karr r-ry "nk .run-l wlrlrl. will url
lr- lltr- A.V.(`. ul the receiver4 Thr: Output meter rnuer be
trvr- r-nough to irivr sufficient rudinu with-rueh u week

rig .
1hi- output ini-ter rhnuld he eonnretrd from the 4| plete

tn ground thmul;h u .25 mld. rand-rn" or .emu thr- vaiee
mil, drpumimg urmn it. -r-nr" ty, A convenient point ru
connect tlir- 4| plute in tlu- termrn-l nl thr- tene control ewiteh,

During all enlibretinn and alignment udiultmentr. keep the
volume conlrnl lull on.

I. F. ALIGNMENT

'l'lie LF. trimmer: ln- lor-ated nn the tap al the LF. trem-
lrrrrrrrr. which ...ry lr- rrrr .rl lr, "movin, ill. from ruvrr.
und mnnrctrd lrnm thu 77 :mitral grid rn ground. Adiurt thr-
orcilletnr nutpul ln uivr- about lull lr reading ol the output
meter, Tum- thr- rr-t tn make :er thut n ntion ar riunul
ir tum-d in rirrcr~ thi. would .Hr-et the output meter r `
Adiu-t ull three LF. trimmerr tu give mnirnum output

use a hnlrplrtr nerr-w driver nr one having only
tip. Alter the l.|". trimmer. have been rtli'rnr-i'l> finer, "a beck
.url r-pr-.r rlrr prow-lu". .rr-er .ny .aiu-...rum of or". will
ellen the nthrrr to mme extent.

DIAL CALIBRATION

vl`li-- flu-l nf the Autri Redirr i. r-elr'hrutfrl in lrilrreyclu. err-
rlrnngr-n in tlw pnritmn nl the flexible rhahu may neun the
will ation m vnry, the diel un he eelibruted'ur inllawr:
II00 K.(`. Inu-ft ri .uri-w driver in the rlottr-d rhrit un thr-
rrnr rrl the tontml hrud. llrrld the luninu rontrrrl knnh ru ther
thu .tutrrm runnin. tuned in prnpr-rly .nd by turning thr-
rrrew driv'r udjurr the diul pointer in thu it indie-ter th-

eerie- with the output ul the iert i,
al the receiver. Thin ennrlenner
reeure raper uli urnent ol the untenne r ire.

Set t e test mi letor te enctly 600 KL. Tune the india ret
rwruuirnum volume. Celibnte the dial et the low frequency
end by netting the Tointer lu reed exactly 6.0 (600 KiC.).

Set the tert urei lutur tu en ly |400 K.C. Turn the tuning
knob until the dinl pointer indiutee I4.0 (|400 K.(`.,) and
then .din-t the .eilletei- .hunt trimmer (third one hom .halt
end el the urinble eonderuer) until the .inn-I ir reeeived with
mnximurn output. Then ndiuet the other twrr 'rung eandenrer
trimmer. ee direeted under R.F. ulignment.

R. F. ALIGNMENT

With the teet me. htm .et te upproeimulely |400 K.('..
tune the eel very cure u y for meximum uutputA

Adiurr the output of the meillutor to the minimum value
which will give rumcient uutput mer" deflection. Adjurt the
two trimmers nelreet to tlte shaft end ol the ltlnlt condenser
to give mlximum output meter tending.

MISCELLANEOUS PARTS NOT SHOWN
ON DIAGRAM

urt>> bun umm

REMOTE CONTROL HEAD PARTS

FLEXIBLE SHAFTS

(C)Iohn Fr Rider; Publisher

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