[TenTec] OMNI VI 2.8 INRAD filter for key clicks

[Stuart Rohre]

A hunch on BFO trimmer frequency drift.  It might not be the trimmers 
but any associated fixed disk ceramic caps.  Try slight heating of any 
one by one.  If a big jump happens, that one might be suspect if no 
others act that way.  I doubt it would be the crystals unless they were 
off when newer and now have drifted way out of spec.

-Stuart Rohre
K5KVH