[Elecraft] KPA500 Heat Expansion Pop

[Ken K3IU]

G'morning, all:

In case anyone is keeping score, I shortened the 5/16" 
screws that support the PA module on the Z bracket and the 
Right Hand Panel, reinstalled them and now  no longer have 
thermal expansion "clicks/ticks/pops" of any kind as the amp 
heats up(tested to 65C) or cools off. I had previously tried 
tightening just the Right Panel screws because they were the 
easiest to get at and it really didn't help. Today I opened 
up the amp and shortened the five on the Z bracket and now 
all is nice and quiet.

73,
Ken Wagner K3IU
K3 #202
KPA500 #108