[Elecraft] KPA500 Clicks & Pops

[Bob McGraw K4TAX]

What is the recommended solution to stopping the clicks and pops from 
the KPA500 as the amp heats during transmission and cools during 
receive?  I've seen one that suggested replacing the screws in the Z 
bracket with 4-40 x 1/4".    Any traction to this?

The amp performs absolutely fantastic.  The clicks and pops are more 
annoying when working high duty cycle modes.

Thanks in advance.

73

Bob, K4TAX

KPA500 s/n 3519