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41. Re: [Amps] Dummy load. Can distilled water be used instead of oil ? (score: 1): Author: Bryan Swadener <bswadener@yahoo.com>; Date: Sun, 11 Aug 2013 15:39:36 -0700 (PDT); I use a DL made from four 50 ohm / 400W flange-mounted RF resistors*, in series-parallel. VSWR is very good though 6m. In the lab at a former employer, I had access to an RF power source of 660W @ 4; /archives//html/Amps/2013-08/msg00085.html (8,464 bytes)
42. Re: [Amps] Rectifier equilization? (score: 1): Author: Bryan Swadener <bswadener@yahoo.com>; Date: Sat, 14 Sep 2013 13:08:22 -0700 (PDT); As usual, excellent reasoning Manfred. However... I bought fifty 6A10 rectifiers for $17 including shipping (34 cents/each). 1N5408s might've been even cheaper but these were still dirt cheap an; /archives//html/Amps/2013-09/msg00169.html (10,726 bytes)
43. Re: [Amps] Other HV rectifier diodes (score: 1): Author: Bryan Swadener <bswadener@yahoo.com>; Date: Thu, 26 Sep 2013 16:38:33 -0700 (PDT); I recently bought fifty 6A10 1KV/6A rectifiers for $17 postpaid. That's $0.34 each. vy 73, Bryan WA7PRC In addition to the high voltage diodes 6A10 mentioned earlier, rated for 1 kV PIV, 6A DC and; /archives//html/Amps/2013-09/msg00312.html (8,316 bytes)
44. Re: [Amps] 160M PI network Toroidal Coil (score: 1): Author: Bryan Swadener <bswadener@yahoo.com>; Date: Sat, 5 Oct 2013 15:41:09 -0700 (PDT); I might as well add my input... My GS35b 160m monobander will use about 15uH fixed and 16uH adjustable, to drive ~ 25 to 500 ohms. The fixed inductor is 20T 10 AWG 19-strand silverplated copper wir; /archives//html/Amps/2013-10/msg00058.html (10,309 bytes)
45. Re: [Amps] Keying Kenwood TL922 with Yaesu FT1000D (both old guys) (score: 1): Author: Bryan Swadener <bswadener@yahoo.com>; Date: Sat, 19 Oct 2013 12:17:23 -0700 (PDT); Jean, The TL922 T/R control has the same problem that the Heathkit SB-220 has... whatever drives the "RL CONT" input must discharge 0.02 uF (C27 + C61). While the two relay coils' DC resistance per; /archives//html/Amps/2013-10/msg00341.html (9,691 bytes)
46. Re: [Amps] Keying Kenwood TL922 with Yaesu FT1000D (both old guys) (score: 1): Author: Bryan Swadener <bswadener@yahoo.com>; Date: Sat, 19 Oct 2013 13:55:07 -0700 (PDT); Hi Jim, I got a larger number when simulating it using LTSpice (for the SB220). Of course, measuring is always bestest but, even if there is significant error, 2.4A is a factor of almost X10 more t; /archives//html/Amps/2013-10/msg00344.html (13,492 bytes)
47. Re: [Amps] Keying Kenwood TL922 with Yaesu FT1000D (both old guys) (score: 1): Author: Bryan Swadener <bswadener@yahoo.com>; Date: Sat, 19 Oct 2013 14:17:13 -0700 (PDT); My comments are the same! Nothing to get excited about! vy 73, Bryan WA7PRC Wrong Jim, Bryan ! Youre respondeing to W8ZR, not W7RY! I think I put the text of my msg under W7RYs header in his ear; /archives//html/Amps/2013-10/msg00346.html (9,639 bytes)
48. Re: [Amps] Tokyo High Power is no more... (score: 1): Author: Bryan Swadener <bswadener@yahoo.com>; Date: Sat, 28 Dec 2013 13:48:27 -0800 (PST); Thanks for the update. A local newbie ham who recently purchased a water-damaged THP amplifier has been berating THP on the air for not selling him a replacement part. Bryan WA7PRC http://www.arrl; /archives//html/Amps/2013-12/msg00160.html (8,461 bytes)
49. Re: [Amps] Harbach metering board in SB-220 (score: 1): Author: Bryan Swadener <bswadener@yahoo.com>; Date: Sat, 8 Mar 2014 12:21:51 -0800 (PST); Heath used three 4M7/5%/1W Carbon Composition resistors in the series leg of the HV meter multiplier (R6, R7, R8). Those, or the 14 1M0/5%/0.25W Metal Film resistors W8CQ used can be replaced with th; /archives//html/Amps/2014-03/msg00030.html (8,468 bytes)
50. Re: [Amps] transformer winding (score: 1): Author: Bryan Swadener <bswadener@yahoo.com>; Date: Mon, 17 Mar 2014 22:02:53 -0700 (PDT); Hi Paul, When I rewound a transformer for my GS35b amplifier project, I found NMN333 "paper" from: OTS Wire & Insulation 9155 SW Barber Street Wilsonville, OR 97070 503-682-7050 It wasn't terribly ex; /archives//html/Amps/2014-03/msg00093.html (9,430 bytes)
51. Re: [Amps] L4-B (score: 1): Author: Bryan Swadener <bswadener@yahoo.com>; Date: Mon, 31 Mar 2014 16:18:41 -0700 (PDT); Also, Kapton(tm) aka polyimide tape will work FB. It works well at high temperature and high voltage. vy 73, Bryan WA7PRC -- Date: Sun, 30 Mar 2014 23:07:13 -0500 From: Edwin Karl To: amps@contesting; /archives//html/Amps/2014-03/msg00197.html (7,751 bytes)
52. Re: [Amps] L4-B (score: 1): Author: Bryan Swadener <bswadener@yahoo.com>; Date: Mon, 31 Mar 2014 16:33:25 -0700 (PDT); Yes, really. We used it for decades, in both tape form and Kapton-insulated wire form, in critical applications at the world's largest OEM of RF-driven sealed CO2 Lasers. The stuff is VERY tough. The; /archives//html/Amps/2014-03/msg00199.html (9,284 bytes)
53. Re: [Amps] L4-B (score: 1): Author: Bryan Swadener <bswadener@yahoo.com>; Date: Tue, 1 Apr 2014 18:26:57 -0700 (PDT); Mark: I was done with my first posting. You haven't changed and won't change my opinion. Kapton/polyimide is FB in this application. YMMV -30- Fini Done End vy 73, Bryan WA7PRC Subject: Re: [Amps] L4; /archives//html/Amps/2014-04/msg00043.html (7,366 bytes)

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