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CIRCUiT ADJUSTMENT (TUNER SECTION)
AM If/Rf
o
o
Electron ic
Voltmeter
Electronic
Voltmeter
BW/LW
Bar Antenna
455 kHz
A
Figure 14-1 AM If
Figure 14-2 AM If CURVE
Figure 14-4 SW RF
Figure 14-3 lW!MW Rf
Dummy
(See Figure 14-5)
Rod Antenna
Sweep
Test
Generator
Loop
Signal
Test
Generator
Loop
I@
d=JlO
SIGNAL
400 Hz, 30%, AM modulated
GENERATOR
TEST
FRIO·
DIAL
AD-
STEP
STAGE
QUENCV POINTER
JUST·
REMARKS
SETTING
MENT
MWIF
1
IF
455 kHz
High
T3
Adjust for
frequency
best "IF" curve.
LWRF
2
145 kHz
Lowest
L10
Band
frequency
f - - -
coverage
3
295 kHz
Highest
TC8
frequency
Adjust for
maximal output.
4
170 kHz
170 kHz
L7
f - -
Tracking
5
220 kHz
220 kHz
TC5
6
Repeat steps 2,3,4 and 5 until no further improvement can
be
made.
MW RF
7
510 kHz
Lowest
L9
Band
frequency
f - - -
coverage
8
1,650 kHz Highest
TC7
frequency
Adjust for
maximal output.
9
600 kHz
600 kHz
L7
f - - -
Tracking
10
1,400 kH
1,400 kH
TC4
11
Repeat steps 7,8,9 and 10 until no further improvement
can be made.
SW RF
12
5.85 MHz
Lowest
L8
Band
frequency
I - -
coverage
13
18.5 MHz
Highest
TC6
frequency
Adjust for
maximal output.
14
6.5 MHz
6.5 MHz
L6
f - - -
Tracking
15
16 MHz
16 MHz
TC3
16
Repeat steps 12,13,14 and 15 until no further improvement
can
be
made.
Figure 14-5 SW DUMMY
...---.l\Nlr-il!--
To Telescopic Rod Antenna
C
< R =30ohms
Z = 50 ohms
C = 12 pF
Z: Output Impedance of Signal Generator
' - - - - - - - - - - T o Chassis GND
i~' ~ ~
LI
TC5@)
L2
TC3@
"' ,
eJ'r'~·
TC2
@
' 0
16
~
TC7
~L6TC6@
8
9T2~
~ ~ ~c~
IC2
I0l
L9
LIO
\8!
VRI
~IC3
~
T3
LW
l7
MW
figure 14-6 ADJUSTMENT POINTS
-14 -
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