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QT-12HS/HR/HB/HY/BL
QT-12ES/ER/EB/EY
Should
it become
necessary at any time to check the adjust-
ment of this receiver, proceed as follows;
1. Set the volume control (VR103) 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.
5. Set the Function
Selector Switch
(SW101) to "RADIO"
position.
AM
tF/RF ADJUSTMENT
@ Set the signal generator to produce a signal of 400Hz, 30%,
AM modulated.
© For adjustments in steps 4 and 9, see [Note A].
TEST | FRE-
| DIAL
|ADJUST-
STEP
| BAND
|STAGE|
QUEN.- | SETT-
MENT
REMARKS
CY
ING
IF (Connect instruments as shown in Fig. 10—1.)
]
High
Adjust for
1
MW
IF
|468kHz;} end of
T3
best "IF"
dial
curve.
pi
Low
2
LW
145kHz]
end of
Band
dial
3
LW
Adjust for
maximum
output.
z
z
6
Repeat steps 2, 3, 4 and 5 until no further improvement
can be made.
RF (Connect instruments as shown in Fig. 10—3.)
Low
7
MW
510kHz|
end of
Ls
Band
:
dial
Pa tred cover-
age
High
8
Mw
1650
|end of
TC7
Adjust for
kHz
dial
5 maximum
{—
T
output.
9
Mw
600
600
U7
Track- | kHz
kHz
pF}
__ ing
1400
| 1400
10
| MW
| kHz
kHz
TC4
7]
Repeat steps 7,8, 9 and 10 until no further improvement
can be made.
Low
12
5.85
|end of
L8
Band
MHz
dial
cover-
age
High
13
18.5
jend of
TC6
Adjust for
MHz
dial
_ | oe
Put.
is
foe
L6
MHz
| MHz
16
ibs
Repeat steps 12, 13, 14 and 15 until no further improve-
ment can be made.
[Note A] 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 away to decrease inductance.
SWEEP
SIGNAL
GENERATOR
SIGNAL
GENERATOR
GENERATOR
GENERAL
ALIGNMENT
INSTRUCTION
oR"
OSCILLOSCOPE
CURVE
MW/LW
TEST LOOP
BAR ANTENNA
Figure 10-1
MW/LW
TESTLOOP
BAR ANTENNA
1C3
Figure 10—2
f——
To Telescopic Rod Antenna
R
¢
R = 30 ohm
Z= 50 ohm << O _ lo pr
To chassis GND
Telescopic Rod
Ee
1C3
Dein
~10—
Figure 10—4 ADJUSTMENT
POINT
ELECTRONIC
VOLTMETER
Z: Output impedance of signal generator
ELECTRONIC
VOLTMETER
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