Watchman FD-30A - AM Section Adjustments; AM IF and Tracking Adjustments; AM Frequency Coverage Adjustment

FD-30A
AM SECTION :
AM ff signal
VTVM
generator
(range:
0.5—5
V
ac)
Put the lead-wire
antenna close to
the set.
ee
30% amplitude
modulation by
400 Hz signal PHONES
e Repeat the procedures in each adjustment
several times, and the frequency coverage and
tracking adjustments should be finally done by
the trimmer capacitors.
AM FREQUENCY COVERAGE
ADJUSTMENT
Adjust for maximum reading on
VTVM.
1,680 kHz 520 kHz
CT4 T4
AM IF ADJUSTMENT
Adjust for maximum reading on
VTVM.
1,400 kHz 620 kHz
Adjust for maximum reading on
VTVM
AM TRACKING ADJUSTMENT
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