[Elecraft] KPA500 cabinet buzz

[k2qo]

After much searching, this 2.4 year old thread is the only info I can find on
this issue. I bought a factory built KPA500 a few months ago and mine buzzes
on CW key down. Af first I thought maybe this is normal as I never owned an
HF amp. Now I think it is a problem. 

Any know how to fix this? I can shoot a short movie if that helps.

73,
Mark K2QO



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