[Collins] 32V-2 Help

[Jim Walker]

I am in the process of working on a 32V-2 transmitter.  I have two
problems that I have yet to get a handle on and would appreciate help.
The first is on 15 meters the transmitter will not load on 21.6 (the
multiplier alignment frequency).  I get a dramatic dip but no power on
the BIRD and dummy load and it looks more like parasitic oscillation.
This is in the #6 loading position.  If I go to the low end of 15 meters
(21.0 - 21.4) I can get good power but the higher in the band I go the
less power and more prone to have the loading act very squirrelly.
Since all of the other bands behave correctly with good power and
stability including 10 meters.  I changed the three mica capacitors in
the multiplier stage that are associated with 15 meters on the
assumption there was a multiplier problem. I replaced them with silver
mica 500 volt capacitors.  While more stable, the problem still
persists.  Am I correct in thinking the transmitter should load the
range from 21.0 to 21.6?  Any idea on where to go next?
 
The second problem is the CW side tone oscillator produces a raspy buzz
when the transmitter is keyed in the CW mode and using a 600 ohm
military speaker on pin 16 and ground according to the manual.  I also
tried a 600 ohm headphone element but had the same result.  In AM I get
good audio reports so the problem appears to be in the CW side tone
oscillator circuit V205.  I have checked the original tube and found no
problem and ultimately replaced the tube.  I have replaced the three
mica .01 capacitors (C208, C209 and C202)  with SPRAGE orange drops with
no change in the CW side tone.  The four RF chokes L201 - L204 check
good.  Any ideas on where to go next on this one?  Thanks, Jim KZ5AW