[Elecraft] KPA500 assembly

[Georgek5kg at aol.com]

I am assembling my KPA500, and am to the point of installing the RF Power  
Amplifier/Low Pass Filter (PA/LPF) Module.  I notice when handling the  
module, if I gently rock it back and forth, I hear a small clicking sound  from 
somewhere in the module..  
 
I have inspected the module, and do not see any debris or spare parts loose 
 in the module.  Is the clicking normal and, if so, where is it coming  
from?  If it isn't normal, what next?
 
73, George
 
George  Wagner, K5KG
Sarasota, FL 
941-400-1960  cell