At 03:42 PM 7/20/2008, Rick Karlquist wrote...
>Obviously, the first thing I tried was to replace the trimmer with
>a fixed capacitor.  Didn't help.

Did you do any testing of encapsulation materials, other than epoxy? 
Surely 3M has some fairly impermeable stuff in their kit. AIR from last 
time I was into a 10811, there's no coating on the components/pcb, 
other than a solder mask.

What about polyamide or PTFE PCBs?


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