[R-390] r-390a chirping CW

[Forrest Myers]

Hello,
 I have a capehart r-390 a sn 557 that is working quite well except for a
couple of problems. All bands and all filters work. There are a couple of
problems though and I'm asking the learned group on this list for any quick
information or ideas.
 Problem #1:
  Good clean CW signals chirp when heard on the 390a. It sounds like the BFO
changes frequency with AGC levels. Checking the voltage at the audio module
and it's a steady 150.1 volts. Haven't checked farther into it.

 Problem #2:
  Audio level is low but sounds good. I have to run the Local Gain control
wide open to get a comfortable listening level. This problem has crept in
over the past year. All tubes have been replaced. the radio has been
re-capped, including the filter capacitors in the audio module. It has been
aligned and the PTO is very linear after setting the end points. The rig
works very well except for the above mentioned problems. I've been away for
about 9 months and haven't used the rig. Am planning on getting into it
again after building a set of test wire extender so I can check into
voltages and signals. Just thought I'd put out the symptoms to see what
advice I could gather.

73 DE AG4ND
Forrest Myers
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