DIAL CORD STRINGING
Turn the drum fully clockwise and stretch its cord over the
parts in the numerical order as shown in Figure 4-2.
2. Turn the tuning control shaft fully counterclockwise and
fix its pointer to “0” point as shown in Figure 4-l.
Point
Tuning Control
Shaft (128)
GENERAL ADJUSTMENT INSTRUCTION
Should it become necessary at any time to check the adjust-
ment of this receiver, proceed
follows;
1. Set the volume control
to maximum.
2. Attenuate the signals from the generator enough to swing
the most sensitive range of the output meter.
3. Use a non-metallic adjustment tool.
4. Repeat adjustments to insure good results.
l
Set the mode selector switch
to AM position.
Set the signal generator to produce a signal of
30%.
AM modulated.
.
For adjustment in step 4, see
S E T -
S T A G E
M E N T
REMARKS
IF (Connect instruments as shown in Figure
High
Adjust for
1
AM IF
455kHz end of
best IF
dial
RF (Connect instruments as shown in Figure
RF (Connect instruments as shown in Figure
Low
2
AM
dial
I 3 I
I
I
I
for
dial
maximum
4
AM
600
600
output.
ing
5
AM
1400
1400
TC3
Repeat
steps
and 5 until no further improvement
can be made.
Check the alignment of the receiver antenna coil by
bringing a piece of ferrite (such as a coil slug) near the antenna
loop stick, then a piece of brass. If ferrite increases output,
loop requires more inductance. If brass increases output, loop
requires less inductance. Change loop inductance by sliding the
bobbin toward the center of ferrite core to increase inductance,
or to decrease inductance.
ELECTRONIC
