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ALIGNMENT
INSTRUCTION
Should it become necessary at any time to check the alignment of this receiver, proceed as follows;
1) Connect an output meter across the speaker voice coil lugs.
2) Set the volume control at maximum.
3) Use the lowest setting of signal generator capable of producing adequate indication on the lowest scale of output
metere.
4) Use a non-metallic alignment tool.
5) Repeat adjustments to insure good results.
ALIGNMENT
AM
| Connect signal generator
| Exactly 455kHz. (400Hz, | The highest frequency | Adjust for maximum | 3rd—IF Trans. core
through the *dummy to | 30%, AM modulated.)
output on speaker'
2nd—IF Trans. core
the external antenna.
voice coil lugs.
ist—IF Trans. core
hak
a
as step 1
Exactly 520kHz, (400Hz, | The lowest frequency | Same as step 1
AM Oscillator core (L4)
30%, AM modulated.)
_Same as step 1
Exactly 1650kHz.
Same as step 1
Same as step 1
AM Oscillator trimmer
(400Hz, 30%, AM
(CS)
modulated.)
Same as step 1
Exactly 1400 kHz.
1400kHz.
Same as step 1
AM Antenna trimmer
(400Hz, 30%, AM
(C3), RF trimmer (C4)
modulated.)
|
;
| AM | Repeat steps 2, 3 and 4 until no further improvement can be made.
* APPOINTED DUMMY ANTENNA
R
15 PF
TO RECEIVER SOCKET
3 SIGNAL GENERATOR
'7
65 PF
TO RECEIVER CHASSIS GROUND
R=80-Z(0HM); OUTPUT IMPEDANCE OF SIGNAL
GENERATOR
=
NI
R=75—Z(0HM)
~~
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