-----Original Message-----
From: Ian White, G3SEK <G3SEK@ifwtech.com>
To: amps@contesting.com <amps@contesting.com>
To: <amps@contesting.com>
Date: 23 June 2001 09:03
Subject: Re: [AMPS] vacuum caps
>
>Steve Thompson wrote:
>>I have a couple of Western Electric ones (fixed vlaue), type 8047 - 50pF
>>7.5kV 10A and 50pF 5kV 5A.
>>
>>The 7.5kV one goes to 15kV for 1uA leakage, the other must be gassy and
>>arcs at 1.5-2kV. Can it be mended?
>>
>No. If the leak is in one of the glass/metal seals - as seems likely -
>then that's the end. Because of the way the metal and glass have to be
>processed and then joined, those seals can only be made completely from
>scratch, not reworked.
I guessed so - I wondered if there might be mileage in putting it in a
vacuum chamber for a while until the hipot came right, then quickly sealing
the ends with varnish or somesuch.
Steve
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