[Elecraft] KPA500 clicking

[mcduffie at ag0n.net]

> RF may be switched with PIN diodes, but there are some relays in there someplace.

No TR relay.  Amp is quiet as a mouse when keying/unkeying, even in QSK.  There
IS a STBY/OPER relay, I assume, as I can hear it when I go in and out of OPER.
Also, band switching, of course.

There are ticks due to heating in the heat sink, but not in time with keying.
Random, and varying rate.  Documented on this group previously.

Have you asked Elecraft (not this list) for a diagram?

Gary