OK, a local ham kindly gave me a spare glitch resistor as a replacement for
R12, and the Drake has been repaired, tested, and then packed for the trip.
The homebrew 5m amp has been reconnected to its internal HV p/s, tested, and
then packed. I may never find out what caused R12 to blow,
Hi to the group -- I have a very nice Drake C line that I need to sell, as
it has become excess to
my needs. It does have one minor issue and that is that the R4C cabinet is not
original. It was lost somewhere in transition and
I have not been able to find it. So, I modified a TR4C cabinet to
just FYI,
I took the TR-4C back to my work bench and looked it over again out of
the case. Saw nothing, then I tried it on my spare AC4 (both AC4s have
been rebuilt btw) and found no issues, took it back to the shack and
tried it again and now all is functioning again. Have no idea.
Still
What factors could contribute to frequency instability EXTERNAL to the PTO?
My TR-4C has just developed a jittery frequency, jumping back and
forth around center freq by as much as 50Hz. I know someone (if not
many) will refer me to the excellent articles on PTO rebuilds, but
before someone
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