B-Liners,
Looking for advice on how to pursue fixing a new issue with my B-Line. I
wasn't even sure how to name or categorize it.
I will post a recording of the sound of the problem which may help in
analysis. It's a problem that suddenly appeared without me making any
changes, so I initially trued tube substitution with some success, but
not continuing success. I replaced V9 and the rig seemed stable for
quite a while. I exercised PTT with not problems, but after half-hour
of idle time, I closed the PTT line, and when released, the problem had
returned.
All switches have been cleaned in the last year or so, and up until this
started, things have worked well, with only the loss of sidetone on CW
as an unresolved problem with this pair. I mention it, just in case it
may be relevant. Prior to that, I used CW on this rig very infrequently,
but have had several years of excellent performance.
There are short videos at:
https://picasaweb.google.com/kfourso2/BLineWoes?authkey=Gv1sRgCOrp6InRlOXENw
This problem is in SSB only I have not attempted relay contact cleaning,
but this seems like a component value drift, or capacitor leakage type
issue.
My hope is that someone has already experienced this problem, and solved
it.
Thanks for any analysis and suggestions...
--
*73, Mark, K4SO
*www.k4so.com
picasaweb.google.com/kfourso
picasaweb.google.com/kfourso2
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