Advertisement
D. Adjust –
Adjust the cores and trimmers of antenna, R.F., and oscillator
coils for maximum deflection. Part number of the core and
trimmer is as following table:
STAGE
ANT. STAGE
ADJ.
CORE
BAND A
L1
BAND B
L2
BAND C
L3
BAND D
L4
NOTE: The oscillator adjustments is performed first. The R.F. is adjusted next
to obtain maximum amplitude. The antenna cores are adjusted last. Adjust
cores for low end of band and trimmers for high end of band.
-5
B.F.O. ALIGNMENT
NOTE: The non-metallic alignment tool is required for complete
alignment. The mode switch on the front panel should be
positioned S.S.B. / C.W. A knob of the B.F.O. pitch on the front
panel should be positioned one o'clock.
A.
Signal Coupling.
Receive one of a broad cast frequency with exactitude by an
antenna through the antenna terminal.
B.
Connect V.T.V.M. or equivalent.
Connect a P type vacuum tube voltmeter or equivalent probe
between a side of T6 secondary coil and chassis earth. Set the
vacuum tube voltmeter range on 1.5 volt.
C.
Adjust -
Adjust the core of the B.F.O. coil T5 for a zero-beat note by loud
speaker. Adjust the core of coil T6 for a maximum deflection on
vacuum tube voltmeter or equivalent.
R.F. STAGE
TRIM
CORE
VC1
L5
VC1
L6
VC1
L7
VC1
L8
OSC. STAGE
TRIM
CORE
C101
L9
C102
L10
C103
L11
C104
L12
TRIM
C105
C106
C107
C108
8 OF 28
Advertisement
