Maybe I don't know what I'm looking for but the capacitor is marked "EKC .02
GMV 1.6KV"
This capacitor goes in an old Heathkit DX-100 transmitter.
----- Original Message -----
From: <rfdude@comcast.net>
To: "Don Knight" <n4dek@triad.rr.com>
Sent: Thursday, December 25, 2003 12:48 AM
Subject: Re: [Amps] disk caps needed
> you can check all your life but you will not find such a capacitor. You
are talking about a 20 femto farad capacitor. Two post separated several
inches may come in the ball park. But as a small component that would put
you in the micron scale size, such as modern FETs or small electronic
sensors. That small size already rules out 1.6Kv rating as it would lead to
tens of mega volt per cm fields, something that most materials will not
withstand. Perhaps you ment a 20 pF capacitor. Ceramic disk capacitors are
one type you could find. Others are the door knob type. I made capacitors in
the 10 to 50 pF range using mica and brass strips. You wrap an "I" shape
piece of brass with several layers of mica at one end and then fold the arms
of a "T" shape piece of brass over the insulated mica, then squeeze it in a
vise until the right cap value is obtained. The size of the brass determines
the range in cap values. You need a HV source to test it for breakdown. I
reached 800 volt with m!
> inimal effort. I expect you could reach your target voltage with extra
layers of mica.
> good luck and 73s
> kb3bf
> > Anyone know of a source for some .02pF @ 1.6kv ceramic disk capacitors??
I've
> > checked several places on the web with no luck.
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