Electrical Research Lab 603 Schematic

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Product Information:
Model:603
Manufacturer:Electrical Research Lab (Sentinal)(ERLA)

Schematics Content:

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Page 1:

ERLA PAGE 5-1

*39.3.6 blues

ELECTRICAL RESEARCH LABS.

Page 2:

PAGE 5-2 ERLA

MODEL 603
Voltage ,Alignment
Parts List

mor mom. :or progeny ongoing either the internal-es transformer or the variable condenser it
m neesnsary T-on seenrneeiy eniiurseed u-einszsi- be used with some type er output neusuring device.

ELECTRICAL RESEARCH LAB S.

. 0111196 e aide of the 0821118501' output in the Control sri-d of ?12 6A? tube lelving the CODCNI

g'id cap dilimhntcied. CvnneCC the ground side of '$116 ostrlllltor In the receive! chBQBXB.

2. Set the oscillator frequency at 265 kilocyclen (this oust be accurate) and 00,1115! the outout or the
oscillator so thlt a convenient reading is outlined on 'he output mter.

3. Align the first intermediate transformer by turning one of the tri-er screws up and down until mimm
reading is obtained on the outnut meter. and then ndJust the other trimmer sci-el of the intemedinte trans-

fomgr for maximum sensitivity.
4. AdJust the second intermediate transformer in the "me unner.

IME: 17? types of intermediate transformer tri-Nr! hive been "led in "lil mdel 116!in1'- Olle 'IPO ll!
mamma hoies in the top or the snie1d, one for each trim-nr. The other type nes a Dress hex nut for
adjusting one intermediate trimmer, me 00161' intelletiille ?rimlr bling-'dlltimi 'im the itllmal' It!!! 10-
cnted inside nt the brass hex nut, Regardless of which type trim: is used the procedure il the sum.

To ALIGN THE VARIABLE CamsERg It to not necessary to remove the receiver chessis from the set housivg to
m'tHVBa-nmmmless of whether or not me receiver is or ie not lounted in the set housing
the alignment procedure is the some. Three holes Ire pmvided in the left hand ride of the set housing for
the gang condenser trimern and one in the front or the set housing for the 600 kilocycle pudding condenser.

l. Properly connect the remote control heed and shafts and unjust the dill needle on the dial face so that
the dial calibration is correct.

2. Connect the high cutout side 'if the oicillltor to the antenna And the ground to the receiver chneoia.

5. Tune the receiver to exactly 1400 kilocycles on the dial and "Just the oscillator to this frequenoy.
BRING IN THF. 1400 KILOUYCLE SIGML T0 lAXIlUl OTH'le BT ADJUS'HIG THE OBCXLMTDR GANG CONDENSER TENDER.
making at the side of the receiver end reading from top to bottom the trimer oondenners are the antenna,
R. F. and oscillator sections. lext, adjust the R. F, end antenna sections of the gang condenser for maxi-
mum sensitivity

4, Tune the receiver to anoreximately 600 kilocycles on the dial and let the oscillator to this frequency.
'nisn adjust the 600 kilocycle padding condenser, which is lomted on end accessible through the hole in the

front of the chassis for maximum output. Alnys rock the condenser slightly to the rimt and left when
making this adjust'r'ent using the nosition of greatest output.

TYPE or Hmm? nz scmn can: anna 0R10 0R10
'le Radio Frequency 6 210 o 80
6m oscillator n lodulator o 210 0 :0 160 60 80
78 Intermediate Frequency 6 210 I 80
75 an Detector Diode n Avo 6 100 1.5
41 output 6 200 a 210
84 Rectifier 6 26M 256

H A, r, each plate
'rota1 '1* current - 6.0 omperes
Read s11 vo1tsgss fron- socket to smssis

PART mol-:R PART mm pm PRICE
1226 Antenna Coil 9453 64'7 Tube socket 5 .15
949s Detector 0611 1255 set Housing Book .25
1230 osciunzor 1294 set Housing cover .55
9499 lst 1. 11, Transformer 1.49 1223 see Housing 3.52
1227 2nd 1, r, mnsroisner 2.05 9501 10 ,uppers ruse .os
1256 nynnnde spesxer 1.00 1159 -A- peter-y esnipxete with .90
11m Antenna Lend .54 ruse and neoprene
1244 set cane .60 9003 rube shield Retainer Bess
909s 50,000 om 1/2 vet: Resistor .19 1561 Tube shiem
6984 500,000 ann 1/: 'att Resistor .19 1229 volume control with switch
6000 100.000 onm 1/3 watt Resistor .19 109 -B- nlininntsr
9460 5,000 01m 1/3 watt Resistor .19 1246 vibrator Rubber cuse
9544 500 onm 1 Inn Resistor .21 1245 worseni-
6875 250 0m 1/3 'att Resistor .19 9554 poser Transformer
890s 250,000 ohm 1/3 'att Resistor .19 9542 miter choke
B907 25,000 omn 1/3 'att Resistor .19 9539 R, in -u rnoke
1355 20.000 on-n 1/2 wsu Resistor .19 1144 R. F. "B" rnuke
1232 Pudding condenser .55 124': 2x s ufd. condenser mock
121s rnree sung cordenrei- 4.10 9511 .5 no. Rypass condenser
9500 Bypass condenser (1-.1,1-.25, 1.29 9546 .01 nrd? 600 veit condenser

1-.5 neu.) 1240 .ooo 1nd. 1000 von condenser
7850 .01 ltd. 400 vo1t condenser .17 9559 .0005 m'd. louided condenser
0356 .1 11rd. 200 v61v. condenser .16 9529 no. so have sooket
5475 .002 1nd. 400 voit condenser .1'1 9515 *B* miminatur Housing case
9525 .2 lifd. 200 Volt Condensrr .24 9514 'B' Eliminator Housing Case
9205 .1 lfdi 400 volt Condenser .20 Cover
1150 .004 life. 400 vo1t condenser .15 1249 " ? Terminsi stris with sei-ess .60
9328 Dry lluotrolytio Condenser 1,15 1240 Remote Control complete 5.00

(2-5 mm) 1458 ming controi Ring .'l'l
9153 Generator .5 imi. condenser .55 1459 volune contro1 lung .'17
059'; spark mug sup-.Neon .55 1460 ninx Light Assesmy .44
'"1" "onine Carriage Bolt 5/8' x 5" .10 1462 $311.6353r5111115i?rgsz1y i'gg
'1118 Rex nut for 3/0- carnage son .05 1465 Drive come Assenmy I
7115 ununting Bolt steel washer .10 1464 ni'ul muse [sticker issembiy .40
9450 .0025 1nd. 111m condenser .17 1465 steering Pose mom; 11
994s; :5. gg 'tube socket .13 1466 Rey '1-1
42 6. 'nite socket .15 146': D141 seize Asseub `
9495 no. 41 'rubs socket .1:5 1460 mul on" Rezoning Ring

Prices are subjeot to Change Without notice. i Plrt Ko. 603

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