[Elecraft] KPA-500 clicking as the temperature changes

[Howard Sherer]

I have had a KPA500 for many years and the only annoying thing is that I
hear clicking of the metal case parts as it heats up and cools down. all of
the case screws are tight and I had this problem from the early days even
before I had to remove the RF deck and send it to the factory for minor
repairs 2 years ago.

I don't think there is a way to find the source of the clicking unless I
bypass the interlock and run it with the case panels off. Have others had
this occur and if so did you find the source and solution?

Howard