I also am trying to sell three or more with similar ratings, and similar
prices. Check http://w6dsr.com/capacitors/index.html
-Doug, W6DSR
-----Original Message-----
From: Amps [mailto:amps-bounces@contesting.com] On Behalf Of Alek Petkovic
Sent: Saturday, April 10, 2021 16:50
To: amps@contesting.com
Subject: Re: [Amps] Vacuum Variable Cap Rebuild
Dr Alex, ur4ll.net, has a 1200pF one for US$135.00
73, Alek, VK6APK
On 11/04/2021 7:33 am, Larry via Amps wrote:
> you could try ECONCO. they rebuild Eimac tubes. the cost would probably be
> more than the used value of the vacuum cap.
> larry
>
>
> -----Original Message-----
> From: Paul Christensen <w9ac@arrl.net>
> To: amps@contesting.com
> Sent: Sat, Apr 10, 2021 10:47 pm
> Subject: [Amps] Vacuum Variable Cap Rebuild
>
> Anyone know if it's possible to rebuild a vacuum variable cap? It
> would require a precision break of the seals, then evacuating the air
> with a new seal.
>
> A cap used on my 160m transmit "T" failed a few months ago. While
> dismantling the antenna at the season's end, I brought the cap back
> home and purchased a Megger 230425 Hi-Pot test set. After testing
> today, the cap repeatedly breaks down at 700V, although it's rated for 5KV.
>
> It would be a shame to discard; it's an expensive Jennings ceramic
> type with a range of 25-5000 pF. Used, they're $1,500 ea. from
> MaxGain Systems. I only need a range to about 1200 pF, so I can
> definitely get by with an alternate that's on the shelf. That's not
> the issue. I would like to save the cap if possible. I'm not sure
> what conglomerate owns Jennings now but I doubt they would have a
> rebuild service when it's much more profitable to sell new caps.
>
> Paul, W9AC
>
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