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1. [Amps] Vacuum variable hipot (score: 1): Author: Steve <g8gsq@f2s.com>; Date: Fri, 18 Sep 2009 12:03:26 +0100; I have a Jennings UCSL1000 - 1000pF, 5kV cap. If I put 5kV dc across it and run it through its tuning range, the leakage current is sometimes zero but fluctuates and there are places where the curren; /archives//html/Amps/2009-09/msg00236.html (6,611 bytes)
2. Re: [Amps] Vacuum variable hipot (score: 1): Author: "Randall, Randy" <Randy.Randall@healthall.com>; Date: Fri, 18 Sep 2009 09:51:44 -0400; You should really see 0uA. Run it through its range and stop on the positions that have leakage. Drop it to 4 KV and let it cook. You might be able to effect a repair if it is gas as the arc will get; /archives//html/Amps/2009-09/msg00237.html (8,428 bytes)
3. Re: [Amps] Vacuum variable hipot (score: 1): Author: "Carl" <km1h@jeremy.mv.com>; Date: Fri, 18 Sep 2009 10:26:45 -0400; This thread brings up a question Ive had for awhile. When hi potting a vacuum variable is it better to use AC or DC for the cooking? Ive a surplus shop commercial unit that goes to 15 kV in 3 ranges; /archives//html/Amps/2009-09/msg00238.html (10,403 bytes)
4. Re: [Amps] Vacuum variable hipot (score: 1): Author: Steve <g8gsq@f2s.com>; Date: Fri, 18 Sep 2009 15:35:25 +0100; If I remember correctly, the Jennings test procedure uses AC and they test by applying voltage for a period, during which arcing can happen and then getting no arcs for a subsequent period - can't re; /archives//html/Amps/2009-09/msg00239.html (10,481 bytes)
5. Re: [Amps] Vacuum variable hipot (score: 1): Author: donroden@hiwaay.net; Date: Fri, 18 Sep 2009 11:17:31 -0500; Can you "really" cook a vacuum ?? I have never heard of a getter function being available. Don WA4NPL _______________________________________________ Amps mailing list Amps@contesting.com http://list; /archives//html/Amps/2009-09/msg00240.html (10,757 bytes)
6. Re: [Amps] Vacuum variable hipot (score: 1): Author: "Carl" <km1h@jeremy.mv.com>; Date: Fri, 18 Sep 2009 13:09:49 -0400; Its something to do with zapping off whiskers iff'n I recall correctly. Similar to what Eimac does with "real tubes" Carl KM1H _______________________________________________ Amps mailing list Amps@c; /archives//html/Amps/2009-09/msg00241.html (12,128 bytes)
7. Re: [Amps] Vacuum variable hipot (score: 1): Author: "DF3KV" <df3kv@t-online.de>; Date: Fri, 18 Sep 2009 20:58:17 +0200; I think that is still normal. The 5KV rating normally is the peak AC test voltage rating at maximum capacity, not the working voltage. When those are stored for a longer time the vacuum might not be; /archives//html/Amps/2009-09/msg00242.html (9,146 bytes)
8. Re: [Amps] Vacuum variable hipot (score: 1): Author: "Randall, Randy" <Randy.Randall@healthall.com>; Date: Fri, 18 Sep 2009 15:42:28 -0400; That was an interesting read. Thanks for sending the link. Randy AB9GO I think that is still normal. The 5KV rating normally is the peak AC test voltage rating at maximum capacity, not the working vo; /archives//html/Amps/2009-09/msg00243.html (10,074 bytes)

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