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QT-7OH(R)
©
CIRCUIT ADJUSTMENT (TUNER SECTION}
AM IF/RF
SIGNAL
GENERATOR
400 Hz, 30%, AM modulated
TEST
FRE-
DIAL
AD-
STEP;
STAGE
| QUENCY | POINTER | JUST-
SETTING | MENT
Sweep
Generator
MW
IF
Figure 10—1 AM IF
455 kHz | High
For UK: | frequency
T3
Adjust for
best "'IF'' curve.
468 kHz
k
Signal
MW/LW
io
Band
ene
ee
ae
Generator
Test Loop
Bar Antenna
coverage
3
295 kHz | Highest
TC8
frequency
Adjust for
maximal output
10 kohm
170 kHz | L7
rw
170 Ki
Tracking
5
270 kHz | 270 kHz | TC5
Repeat steps 2,3,4 and 5 until no further improvement can
be made.
7
510 kHz
Band
coverage
1650 kHz
Figure 10—2 MW RF
t—~ To Telescopic Rod Antenna
a
R = 30 ohms
Z = 50 ohms<, = 10 pF
Z Output impedance of signal generator
To chassis GND
Lowest
L9
frequency
Highest
TC7
frequency
600 kHz
Adjust for
:
Signal
Telescopic Rod
maximal output
Generator
Antenna
y 3
600 kHz
L7
Tracking
1400 kHz}
1400 kHz}
TC4
Repeat steps 7,8,9 and 10 until no further improvement
can be made.
RF
5.85 MHz
Band
coverage
on
18.5 MHz
14
6.5 MHz
fis Tracking
Lowest
L8
frequency
Highest
TC6
frequency
Adjust for
maximal output
6.5 MHz
L6
TC3
Band Selector
Repeat steps 12,13,14 and 15 until no further improvement
Switch i
can be made.
Figure 10—4 ADJUSTMENT POINTS
~10—
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