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1. [Amps] Henry 2K Classic X (score: 1): Author: "Gene Bigham" <jbigham2@kc.rr.com>; Date: Tue, 8 Mar 2005 19:22:48 -0600; Ordered today the plate caps 3 pieces 75pf and one piece 25 pf fixed value 7.5 VDC, a new band switch assembly for the output side, and a roller inductor assembly. All were in stock at Henry and Ted; /archives//html/Amps/2005-03/msg00225.html (6,384 bytes)
2. [Amps] Henry 2K Classic X (score: 1): Author: "Gene Bigham" <jbigham2@kc.rr.com>; Date: Tue, 15 Mar 2005 16:43:04 -0600; Micarta insulator material? I posted recently that I have ordered the tank components for my Henry 2K Classic X and they are in shipping to my address at this time. My question is this: I disassemble; /archives//html/Amps/2005-03/msg00348.html (9,311 bytes)
3. Re: [Amps] Henry 2K Classic X (score: 1): Author: Vic Rosenthal <vic@rakefet.com>; Date: Tue, 15 Mar 2005 15:18:45 -0800; One thing that will help, in addition to increasing the air gap, is to smooth any sharp points that are at high potential, such as the bandswitch lugs that are connected to the plate side of the tank; /archives//html/Amps/2005-03/msg00349.html (7,407 bytes)
4. Re: [Amps] Henry 2K Classic X (score: 1): Author: R.Measures <r@somis.org>; Date: Wed, 16 Mar 2005 03:20:24 -0800; IMO, the solution is to discourage regeneration at approx. 95MHz by decreasing the Q of the VHF suppressors - which in turn lowers anode-Rp and decreases VHF amplification. A high VHF-Q suppressor ma; /archives//html/Amps/2005-03/msg00363.html (11,379 bytes)
5. Re: [Amps] Henry 2K Classic X (score: 1): Author: R.Measures <r@somis.org>; Date: Wed, 16 Mar 2005 03:24:14 -0800; At the voltage normally present - c. 6kV-pk - corona seems unlikely. Richard L. Measures, AG6K, 805.386.3734. www.somis.org _______________________________________________ Amps mailing list Amps@cont; /archives//html/Amps/2005-03/msg00364.html (8,390 bytes)
6. Re: [Amps] Henry 2K Classic X (score: 1): Author: Vic Rosenthal <vic@rakefet.com>; Date: Thu, 17 Mar 2005 12:47:59 -0800; Absolutely not! The initiation voltage for a corona discharge depends on the charge density. In other words, the sharper the point, the lower the voltage needed to start the corona. I know that switc; /archives//html/Amps/2005-03/msg00392.html (7,724 bytes)
7. Re: [Amps] Henry 2K Classic X (score: 1): Author: R.Measures <r@somis.org>; Date: Fri, 18 Mar 2005 06:12:47 -0800; I have a high-pot tester and here at 120m above sea level I do not see corona at 6kV. Somewhat, but this amplifier does not have sharp points. Bandswitches with needle points should be avoided. Richa; /archives//html/Amps/2005-03/msg00394.html (8,772 bytes)
8. Re: [Amps] Henry 2K Classic X (score: 1): Author: G3rzp@aol.com; Date: Fri, 18 Mar 2005 09:46:45 EST; I have a high-pot tester and here at 120m above sea level I do not see corona at 6kV. You can't always physically see corona. It does make an electrial noise however, which is how the real high volta; /archives//html/Amps/2005-03/msg00395.html (7,523 bytes)
9. Re: [Amps] Henry 2K Classic X (score: 1): Author: Vic Rosenthal <vic@rakefet.com>; Date: Fri, 18 Mar 2005 08:12:36 -0800; The lugs on rotary switches often have sharp points. When wires or straps are cut, this can result in a sharp point. It's worth making sure that parts that will be at high potential are smooth. -- 73; /archives//html/Amps/2005-03/msg00396.html (7,795 bytes)
10. Re: [Amps] Henry 2K Classic X (score: 1): Author: "Steve Thompson" <g8gsq@ic24.net>; Date: Fri, 18 Mar 2005 20:49:05 -0000; Is the onset of corona (visible or not) affected by frequency? Steve _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo; /archives//html/Amps/2005-03/msg00399.html (8,028 bytes)
11. Re: [Amps] Henry 2K Classic X (score: 1): Author: "Will Matney" <craxd1@ezwv.com>; Date: Fri, 18 Mar 2005 20:13:00 -0500; Steve, The higher the frequency, the easier an arc starts. I think it has something to do with the skin effect, not sure. They use high frequency generators to cause the arc to start on tig welders a; /archives//html/Amps/2005-03/msg00401.html (9,718 bytes)
12. Re: [Amps] Henry 2K Classic X (score: 1): Author: R.Measures <r@somis.org>; Date: Sat, 19 Mar 2005 03:25:05 -0800; I detect corona with a micro-ampere meter. How do real high potential testers manage to get a microphone inside vacuum capacitors and vacuum relays? However, Peter, the issue at hand is arcing in th; /archives//html/Amps/2005-03/msg00406.html (8,699 bytes)
13. [Amps] Henry 2K Classic X (score: 1): Author: "Gene Bigham" <jbigham2@kc.rr.com>; Date: Sat, 19 Mar 2005 06:02:02 -0600; Mr. Measures suggested there was a VHF parasite occurring leading to the arc. I sent him a picture of the parasitics in this amplifier. They are constructed of silver plated strap coiled around a cou; /archives//html/Amps/2005-03/msg00408.html (8,744 bytes)
14. Re: [Amps] Henry 2K Classic X (score: 1): Author: R.Measures <r@somis.org>; Date: Sat, 19 Mar 2005 04:05:40 -0800; But not sharp enough to cause premature ejaculation of electrons. The breakdown potential of the bandswitches used in SB-220s and TL-922s tests at c. 5000v. The actual peak potential encountered in t; /archives//html/Amps/2005-03/msg00409.html (9,782 bytes)
15. Re: [Amps] Henry 2K Classic X (score: 1): Author: R.Measures <r@somis.org>; Date: Sat, 19 Mar 2005 04:18:30 -0800; Bingo. The arcs I (foolishly at age 23) drew off of the half-wave anode-resonator with a pencil in my 4cx250R 432MHz amplifier were incredibly lengthy and strangely purplish, even though the peak pot; /archives//html/Amps/2005-03/msg00410.html (9,583 bytes)
16. Re: [Amps] Henry 2K Classic X (score: 1): Author: R.Measures <r@somis.org>; Date: Sat, 19 Mar 2005 05:13:59 -0800; Gene -- The suppressor retrofit kit is absolutely, positively, 100% free if it does not solve the arcing problem and reduce the 28MHz power output by c. 2%. Cheers and good luck. Richard L. Measures,; /archives//html/Amps/2005-03/msg00413.html (9,558 bytes)
17. Re: [Amps] Henry 2K Classic X (score: 1): Author: Tony King - W4ZT <amps@w4zt.com>; Date: Sat, 19 Mar 2005 14:08:53 -0500; <snip> I think we've all done foolish things! Don't you suppose that with your pencil you may have started the arc at a much shorter distance and then pulled the pencil away maintaining the arc in th; /archives//html/Amps/2005-03/msg00420.html (9,164 bytes)
18. Re: [Amps] Henry 2K Classic X (score: 1): Author: G3rzp@aol.com; Date: Sun, 20 Mar 2005 05:09:55 EST; How do real high potential testers manage to get a microphone inside vacuum capacitors and vacuum relays? Once corona (or any other breakdown)starts, there's a current. Sample that current and use an; /archives//html/Amps/2005-03/msg00427.html (8,327 bytes)
19. Re: [Amps] Henry 2K Classic X (score: 1): Author: R.Measures <r@somis.org>; Date: Sun, 20 Mar 2005 06:33:33 -0800; You would have had to have been there, Tony. 1000V of 7MHz and 1000V of 432MHz are different worlds. Richard L. Measures, AG6K, 805.386.3734. www.somis.org ___________________________________________; /archives//html/Amps/2005-03/msg00432.html (10,257 bytes)

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