[Amps] rx noise?

[K1TTT]

I have a commander hf-2500 (pair of 3cx800a7's, no qsk) that seems to be
working fine.  However, during cqww cw last week I had to pull it off the
20m station because it was making a broadband noise while on receive.  I put
it back on the station today and it isn't doing it now.  I tried warming it
up a bit and it still didn't do it....though its obviously not as warmed
through as after 40 or so hours of cqww.  The only other thing I noticed is
when it was doing it the plate voltage dropped a bit, maybe 50-100v, but I'm
not sure if that was a cause or effect since the line voltage sag from the
other stations can make the hv sag a bit here.  Any ideas where to start
looking??


David Robbins K1TTT
e-mail: mailto:k1ttt at arrl.net
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