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JEWEL PAGE 18-3

JEWEL RADIO CORP. MODEL 500

TO OUTSIDE ANTENNA

VOLUME CONTROL

TOP CHASSIS VIEW

OF RECEIVER

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JEWEL PAGE 18-5

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©John F. Rider


JEWEL PAGE 18-7

5 +125 +125 +125 6 +85 +85 +85 7 0 0 0

JEWEL RADIO CORP:

TUBE PIN VTVM 20,000/V 1,000/V 12 BE6

Cone. 600 KC 1 -4+.5 -3.8 -2

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AC AC AC AC AC AC

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5oB5 1 0 0 0 Audio Output2 +5 +5 +5

RESISTANCE

20K

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3 megs. 0 2 S2

3 2 over 100K over 100K 10052

MODEL 505, CLOCK RADIO

10 megs. 0.42 0 1052

500K 500K over 100K

500K 15052

AC AC AC 3852 AC AC AC 8552

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ALL VOLTAGE AND RESISTANCE MEASUREMENTS MADE WITH RESPECT TO CHASSIS GROUND. PND WITH A LINE VOLTAGE 116 V.A.C.

ALIGNMENT PROCEDURE

Connect output meter across Voice Coil.

Connect the signal generator to the standard Hazeltine Loop Model 1150 end couple it loosely to the receiver loop. Set the volume control at maximum, end fully mesh the tuning capacitor.

The output of the signal generator should be just sufficient to give a readable deflection on the output meter.

Set the signel.generator to 455 kc and adjust 1-f trimmers for maximum output in the following order: LO, L5, L4, L3. Re- peat sequence if trimmers were badly maladjusted.

Set the signal generator and receiver to 1600 kc and adjust the oscillator trimmer C4A for maximum output.

Set the signal generator and receiver to 1400 kc and adjust the antenne trimmer C3A for maximum output.

Set the signal generator and receiver to 1400 kc and readjust oscillator trimmer C3A for maximum output.

©John F. Rider


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LA MAGNA PAGE 18-3

IF ALIGNMENT

LA MAGNA MFG. CO.

Alignment Procedure

MODELS IdMC0, 3000

Remove chassis from cabinet. Connect an output meter across the voice coil. Connect the signal generator to the standard Hazeltine loop, Model 1150 and couple it loosely to the receiver loop.

Set the signal generator to 455 KC and fully mesn the receiver tuning capacitor. Keep the receiver volume control at maximum and the output of the signal generator sufficient to give a

readable deflection on the output meter. Adjust for maximum IF trimmers, C8 C7 C6, C5. RF OSC ADJUSTMENT

Keeping the same setup as used for the IF Alignment, set the

signal generator and receiver to 1600 KC and adjust oscillator trimmer C2 for maximum output.

Set the signal generator and receiver to 1400 KC and adjust RF trimmer CL for maximum output.

TUBE PIN VTVM 20,0002/V 1,0002/V RESISTANCE

IR5 1 0 0 0 0 60 -NV 2 +71V. +71 +71 over 5 Meg.

+71V. +71 +71 over 5 Meg. OSC Volt L

550KC -20 -12 -5.4 100K 1600KC -37 -23 -22 100K

5 o o o o 67 0 +0.4 +0.4

17 Meg.

52

IT4 1 +2.75 +2.75- +2.75 3152 2 +71 +71 +71 over 5 Meg. 3 +71 +72 +71 over -5 Meg.

5 +2.75 +2.75 +2.75 2152 6 +1.9 +0.3 0 1.6 Meg. 7 +4 +4 +4 412

IS5 1 +1.4 +1.4 +1.4 1752 LET AVC 2 +1.0 +1.0 0 0.9 Meg. 1st AF

4 +1.1 +0.3 0 0.9 Meg. +20 +17 +0.2 over 5 Meg.

5 +17 +14 +0.8 over 5 Meg. 6 +0.8 0 0 9 Meg. 7 +2.8 +2.8 +2.8 3152

3S4 1 +9 +9 +9 952 2 +70 +70 +70 over 5 Meg. 3 0 0 0 2.1 Meg. 4 +71 +71 +71 over 5 Meg. 5 +7.5 +7.5 +7.5 8os2 6 +70 +70 +70 over 5 Meg. 7 +6 +6 +6 652

(Bolt -line switch in line position) All voltage and resistance measurements are made with re-

spect to chassis ground and with a line voltage of 116V. AC

e John F. Rider


JEWEL - americanradiohistory.com · JEWEL PAGE 18-3 JEWEL RADIO CORP.MODEL 500 TO OUTSIDE ANTENNA...

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