Sentinel Radio Corp. 185A Schematic

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Product Information:
Model:185A
Manufacturer:Sentinel Radio Corp.

Schematics Content:

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Page 1:

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SENTINEL PAGE 11-19
SENTINEL RADIO
Dimes
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(C)John F. Rider, Publisher

Page 2:

PAGE 11-20 SENTINEL
s0<>ke1=,ln-imuere SENTINEL RADIO CORP.
SENTINEL MODEL 185A and 1851-XE-'l'H`REE BAND-FIVE and SIX TUBE
A. C. Operated Superhelerodyne Receiver
K' .e E, egg H , = _ l l .Q \"?\?{? >>< uue.cee.r>>|>>nt?|
. . ,, 4 ~ Ill
if _ W . w ere .. ml
ALIGNMENT PROCEDURE
Be sure to iolluw procedure carefully and in the order given-otheruzise the receiver will be insensitive and the dial calibration
incorrect. Far alignment procedure read tabulation; from left to right. If more than one adjustment is required on any one band.
make tl-le adjustment marked (1) first, (2) next, (3) third.
Before arming allgnmenu 4
clieclr tuning ellal adjustment by turning gang condenser unrll plates teuel. maximum capacity stop (completely in mesh) _at
which point the dial needle must be exactly even with the last line at the low frequency end ol the dial callbratlon. If dial
needle dues uct point exactly te last line meve ' '
(b) Use an accurately calibrated test oscillator wi
(c) Have gmund lead of test oscillator attached to
needle to correct pcsttion.
tl-r some type of output measuring device.
TEST 0SClLLATOR
Un dummy
Place band . . - - bm ~
. 55; Adluat test antenna In Anna, g Refer la paru layuut rllfigr-ann for hen
ogggggn fa; 'I Mdllaloao aerigu of Jam" of trimmers mentlmned belnw:
ten :dll/Mar: ?'
con: ting :
V ' H`gh ul to Atl st acn ofthe second LF. transformer
LF- ALIGNMENT My ;;?Q;;;e;?',;?'? anal .nz im. gm EUR;p?.,? mirllne? for maximum output-mea _aa
use 3"?Y_h3l'|d ."?l. e .Std 455 Ki condenser -alta tube. lust each el the first LF. trauslm-mer
DOSIUOH "KM 'S r "W ' ` Donut remove can ' trimmers for maximum output.
1 Exactlv lhactly .MMS Mid. Receiver antenna Adjust l730 oscillator trimmer for
1730 K.C. 1730 Ki; condenser "A" post maximum output.
T0 2 Exactly Eiaqtly .0lXIz5 Mid. Receiver antenna While making gang condenser adjust 1400
S40 K.C. 1400 K.C. 1400 l\ C. condenser "A" post K.C antenna trimmer for maximum output
BAND 3 Approx, Approx. .000Z5 Mid. Recci-Qer antenna While rocking gang condeftser adjust not
sou K,C, I 600 K.C, | condenser "A" post K;C, oscillator padder lor maximum output.
1 Exactly `1:xaetl wo olam Receiver antenna Adjust 7.5 M.c. oscillator trimmer lor
_{_-5 7.5 M.c. 1.5 and carbon resistor "A" poet maximum output.
7-5 M-C- 2 Appreae Exactl uloonm Receiver antenna While rocking gang condenaer adjust L
BAND 5. mc. 5. mc? carbon resistor "A" peat uc. antenna trixnrrter for maximum output
Adiust 24 !ll.C, oscillator trimmer for
1 2Ex;i:til:y 24E=?2%ly amggm lteeeiger antenna ma?ln\uEt outpug-The sure tr; use ,>rm;exr
_ , . . car n " " t pea _ more an one_pea- is uoic ,
,_s resistor P" back elf trimmer to minimum capacity.
then screw dvwn trimmer (add capacity)
Z4 MC untll the second peakfwhlch lsArhe proper
BANb' one to useus tuned in.
Z Apprax. Approx. 400 Ohm Receiver antenna 'while rocking gang Condenser arljuat 2C
20 M.C. 20 M.C. carbon "A" post M.C. antenna trimmer for maximum output.
resistor
(C)John F. Rider, Publisher

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