[Amps] PTFE dielectricum variable cap

[la7sl Nils Petter]

On the  other side :
I have also used PTFE as dielectricum in the plate coupling cap
in a 4CX250B amp with a 1/4 coaxial plate circuit...No problems
with that one...on 144 Mhz !    Points toward poor polishing job in the
160 amp....
Put a piece of ptfe in a microwave with a glass of water (to protect/
provide load for the tube) and it will NOT heat the PTFE...
That is a good sign...I use to test all materials exposed to strong RF
that way :-)  If it heats or melts it is unsuitable,
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