[AMPS] Looking for a Vacuum Variable Capacitor

[Tom E. Miller]

Gents,

I am looking for a reliable source for tested Vacuum Variable capacitor.  I would like something between 250 and 500 pF for the tune cap and one for load capacitor of anything over 1000pF.  I don't know what the standard voltage ratings were, probably over 10 KV.
I do NOT have a HI POT tester to test it so I need a reliable source.  Where should I look?  How much should I expect to pay?  What should I look out for.  For me the only critical specs are physical size and max value.

Any of you guys have some that you don't need.

Thanks In advance.

Tom Miller
WB8ICT

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