[Collins] 32V-2 Repaired

[David Knepper]

Some of you may recall my dilemma with a 32V-2 that was losing grid =
drive on the upper end of 10 meters.  It worked perfectly on the lower =
bands, however. =20

Well, a very simple fix.  It turned out to the 4 pin plug that fits into =
the PTO. When I wiggled the plug the grid current across the entire 10 =
meter band was uniform not just the lower half.

I found the problem by comparing another 32V-2 "test set" using a scope =
rather than an RF probe VTVM on the output of the PTO going to the grid =
of the 6AK6 buffer tube.

Well, I cleaned the pins and applied a light layer of solder to the =
output pin and that cured the problem.  If you notice, there are only =
two screws holding this can/plug to the PTO.  It does move when you =
wiggle it. =20

So many hours of hunting for a bad capacitor/tube, etc. came down to a =
bad corrosive connection.  I hope that this information will help =
someone with a similar problem.  NEVER rule out mechanical connections!

David Knepper - W3ST
Secretary to the Collins Radio Association (CRA)
Publisher of the Collins Journal
www.collinsra.com
CRA station call - W3CRA


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