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21. [Amps] Need: 5-10uA moving coil instrument (score: 1): Author: LB3HC <rezycle.bin@gmail.com>; Date: Wed, 14 Sep 2011 13:17:45 +0200; I am looking for a 5-10 uA moving coil instrument for use in my new HI-POT tester. New or secondhand is OK as long as it is in OK working condition. I need this instrument for testing HV diode string; /archives//html/Amps/2011-09/msg00079.html (7,248 bytes)
22. [Amps] 3CX1200D7 availability (score: 1): Author: LB3HC <rezycle.bin@gmail.com>; Date: Fri, 16 Sep 2011 14:00:19 +0200; I have a secondhand Henry 3KD premier on hand that I consider acquiring. The amp is the version with the Eimac 3CX1200D7 tube. Questions: what is the availability of the Eimac 3CX1200D7 tube and what; /archives//html/Amps/2011-09/msg00112.html (7,100 bytes)
23. Re: [Amps] 3CX1200D7 availability//more (score: 1): Author: LB3HC <rezycle.bin@gmail.com>; Date: Sat, 17 Sep 2011 16:54:56 +0200; Thanks for the info regarding the 3CX1200D7. From the mails I have received and the postings on this reflector, it looks like this is a very expensive tube. I can get 6 pcs. NOS GS35B tubes for one s; /archives//html/Amps/2011-09/msg00117.html (8,698 bytes)
24. [Amps] Need: YC-156 and SK-306 or similar chimney (score: 1): Author: LB3HC <rezycle.bin@gmail.com>; Date: Thu, 6 Oct 2011 19:33:19 +0200; For a project I am looking for a good YC-156 pull and a suitable chimney. Contact me if you have something to sell. LB3HC _______________________________________________ Amps mailing list Amps@contes; /archives//html/Amps/2011-10/msg00018.html (7,008 bytes)
25. [Amps] Hi pot test - normal leakage current of vacuum cap (score: 1): Author: LB3HC <rezycle.bin@gmail.com>; Date: Sat, 8 Oct 2011 15:05:20 +0200; Hi experts! I have hipot tested a 1000pF UR4LL vacuum capacitor today. It did clunk a couple of times at approx 4 kV and then it settled down. The it clunked a couple times at 8 kV and settled down.; /archives//html/Amps/2011-10/msg00019.html (6,891 bytes)
26. [Amps] Video of Hi-pot tester in operation (testing transmitting variable capacitor) (score: 1): Author: LB3HC <rezycle.bin@gmail.com>; Date: Sat, 8 Oct 2011 13:15:22 +0200; I have posted a video that I captured during Hi-pot testing a transmitting variable capacitor. Note that the instrument scale is 0,5. 20 on the meter is 4 kv. Check it out here: http://www.youtube.co; /archives//html/Amps/2011-10/msg00020.html (7,422 bytes)
27. Re: [Amps] Hi pot test - normal leakage current of vacuum cap (score: 1): Author: LB3HC <rezycle.bin@gmail.com>; Date: Mon, 10 Oct 2011 21:51:18 +0200; Looks like mine behaves similar to your number 4. Several sources state that the clunks are OK to get rid of impurities as long as there is not too many clunks heard. Another cap of similar type, how; /archives//html/Amps/2011-10/msg00026.html (10,289 bytes)
28. [Amps] Photos posted of high voltage test setup of a YC-176 (score: 1): Author: LB3HC <rezycle.bin@gmail.com>; Date: Wed, 19 Oct 2011 20:44:57 +0200; I just hipot tested my recently acquired YC-176 vacuum tube that is intended for a possible future project. It leaks less than 15uA at 16KV A to G. I have not yet applied heater current as there is n; /archives//html/Amps/2011-10/msg00061.html (7,254 bytes)
29. [Amps] YC-179 (score: 1): Author: LB3HC <rezycle.bin@gmail.com>; Date: Wed, 19 Oct 2011 20:59:04 +0200; Correction: YC-179 (last digit should be six upside down) _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps; /archives//html/Amps/2011-10/msg00062.html (6,083 bytes)
30. [Amps] WTB SK-306 (score: 1): Author: LB3HC <rezycle.bin@gmail.com>; Date: Thu, 20 Oct 2011 21:40:22 +0200; I am looking for a good Eimac SK-306 chimney for a YC-179 project. Contact me if you have a unit in good shape for sale. Will pay via PayPal. LB3HC _______________________________________________ Amp; /archives//html/Amps/2011-10/msg00066.html (6,150 bytes)
31. Re: [Amps] Photos posted of high voltage test setup of a YC-176 (score: 1): Author: LB3HC <rezycle.bin@gmail.com>; Date: Fri, 21 Oct 2011 21:54:04 +0200; Hi George. I didn't test breakdown between G-C so far. In a grounded grid setup with a tube like this, my understanding is that an A-G arc is the most likely. The grid is a circular cage surrounding; /archives//html/Amps/2011-10/msg00067.html (9,709 bytes)
32. [Amps] Spice simulation of glitch resistor operation / crowbar circuit in HV PSU (score: 1): Author: LB3HC <rezycle.bin@gmail.com>; Date: Sat, 12 Nov 2011 20:17:01 +0100; I have posted a LTspice (Spice) simulation file that I have used to investigate the operation and energy dissipation in: a B+ glitch resistor, B+ series HV-fuse, main contactor shut off, B+ crowbar s; /archives//html/Amps/2011-11/msg00050.html (8,505 bytes)
33. Re: [Amps] Amps Digest, Vol 121, Issue 15 (score: 1): Author: LB3HC <rezycle.bin@gmail.com>; Date: Mon, 14 Jan 2013 18:35:31 +0100; Hi Colin. Thanks for posting. I took a look at that Hi-Pot tester. That unit is not suitable for testing vacuum capacitors nor most high power vacuum tubes according to my view. The reason is that th; /archives//html/Amps/2013-01/msg00083.html (8,632 bytes)
34. Re: [Amps] Amps Digest, Vol 123, Issue 49 (score: 1): Author: LB3HC <rezycle.bin@gmail.com>; Date: Sun, 24 Mar 2013 19:41:57 +0100; There are several ways to look at how much a grid can take. The energy perspective is the best I think. Current x voltage x time = energy. Or joules = watts x seconds. An Eimac engineering bulletin s; /archives//html/Amps/2013-03/msg00323.html (7,809 bytes)

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