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
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps
|