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ALIGNMENT
INSTRUCTIONS
(TUNER)
Notes:
Don't
use a metallic screw
driver.
REQUIRED EQUIPMENT:
1. Signal generator with a frequency range of 140 kHz to 18.5 MHz: AM
2. Signal generator with a frequency range of 87.4 MHz to 109 MHz:
FM
3. Signal generator with a frequency output of 10.7 MHz+0.5 MHz: FM
4. Vacuum tube voltmeter (AC-VTVM)
6. Oscilloscope with a wide range amplifier of approximately
100 kHz
7. Test loops, a coil of any size wire, one turn or more.
8. FM stereo signal generator.
9. Audio signal generator with a frequency of 20 Hz to 100 KHz.
Notes:
Allow the set at least five minutes to warm up before attempting alignment.
Generator modulation(AM)
...........-2
00002 eee eeee 30%, 400Hz
Generator modulation(FM)
Sede ee ok bet
eee hac ace tes
arenes 22.5kHz, 400 Hz
During alignment keep the signal
THE
INSTRUCTION
OF FREQUENCY
ADJUSTMENT
In order
to comply with
FTZ
rule Nr. 358 S757,
please fix the low
end of dial frequency (87.5 MHz)
and the high end of dial frequency (107.9 MHz) on
FM
band, by adjusting
oscillation
coil (L104) and
oscillation
trimmer
(TC3), respectively, as illustrated
in Figure 9.
TCS
LIO4
Figure
9
AM
ALIGNMENT
ALIGNMENT
PROCEDURE
(TUNER)
SIGNAL
GENERATOR
rmogsDunt
ve
DIAL POINTER FUNCTION) WETER | apiusrent | REMARKS
NEMBER
CONNECTION
FREQUENCY
Thru 0.01 uF to Q201 | 455 kHz
High end of
MW
Oscilloscope con- | T204
Adjust i ne
1
F
'al
T205
imum output.
OF)
base as small as possible | (Sweep)
Diai
nected to TP201
ae
Repeat 2 or 3
times
sh
4
|
y
Radiated Signal as
145 kHz
Low end of
LW
VTVM connected | Oscillator coil
Same as above
small as possible
Dial
to TP201.
L205
Band
are Ga
Coverage | Radiated Signal as
295 kHz
High end of
LW
Same as above
Oscillator
Same as above
3
:
F
3
small as possible
Dial
Trimmer TC9
possible
12
13
Tracking
ANT. as small as
possible
L201
SIGNAL
OR
SWEEP GENERATOR
SWEEP
GENERATOR
BASE OF
Q201
see equipment
item 7
RF
IF
AMPLIFIER
OSCILLOSCOPE
GROUND
Figure 10 AM ALIGNMENT
EQUIPMENT
CONNECTIONS
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