[Elecraft] KPA pop redux

[r miles]

After all the posts & my comment I've been paying  closer attention. I'm 
not getting 'loud' pops just occasional clicks as things heat or cool. 
What got my attention I think was sometimes a few minutes after shutoff 
I near a click. I think that's just the amp metal coming back to room 
temp.
I've had 4 amps. SB200/220 & AL 811h and the KPA. This thing is so far 
ahead of those it's remarkable. I sit waiting to pounce on a KAT500 when 
it arrives.
K9IL