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7-2-2
VXO
FREQUENCY
ADJUSTMENT
Connect
the
input terminals
of the frequency
counter
across CP1 and ground of the "'A'"' unit and perform the
following adjustments.
(a)
Place the set in receive in the CW (P.B. TUNE control
centered)
and
adjust coil
L1 for a frequency
of
19.76330MHz.
(b)
Then set the mode to USB or LSB and adjust R28
VXO Frequency Adjustment
L1
Adjust core for
19.7633MHz
in CW
mode
CP1
counter
7-2-3
AGC SENSITIVITY
AND
S METER
ADJUSTMENT
With
the receive frequency set to 14MHz,
mode to USB
AGC
fast, RF
GAIN
fully clockwise,
connect the signal
generator to the antenna connector.
MAKE
SURE THAT
1F NOT, THE
THE SET IS IN THE
RECEIVE
MODE!!
GENERATOR
WILL BE DAMAGED!!
L13
D20
(A unit)
Sensitivity and S meter adjustment
Connect frequency
(a)
on the front inside of the set to obtain 19.75970MHz
with
the
P.B. TUNE
knob
turned
fully counter-
clockwise.
Set
P.B.
TUNE
knob
to the
center
position and adjust R27 for 19.7615MHz.
R28 and
R27 adjustments interact so repeat several times unit
no further change is noted.
Set P.B. TUNE
knob
fully clockwise.
If previous adjustments are correct,
frequency should read 19.7631MHz.
A27 Adjust for
19.7597MHz
described in (b)
AW,
eA,
a4
Adjust the signal generator output to minimum and
connect the multimeter set to the 10 Volt DC range
across the plus lead of D20 in the "A" unit and
ground.
Make sure no signal is applied to the set.
Adjust R168 in the "A" unit to get 4.0 Volts on the
multimeter.
¢ it
R168
eo
=
—__. Adjust to get 4.0V on the
a
multimeter (a)
se
R153
Adjust to get 200mV
on the
AC millivoltmeter (c)
R44
Connect AC millivoltmeter
(c)
R16
Adjust to make the S meter read S=9+60dB
R22 Adjust to make the S meter read S=1.
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