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281. [AMPS] Need HV connectors (score: 1): Author: stevek@jmr.com (Steve Katz); Date: Mon, 19 Nov 2001 11:22:15 -0800; The Millens are single-contact connectors rated 7000Vdc. I never had a safety concern with them, as B- is typ at ground potential or just 1V or so above ground potential (to provide for metering), an; /archives//html/Amps/2001-11/msg00342.html (9,287 bytes)
282. [AMPS] 8877 rectifier board considerations (score: 1): Author: stevek@jmr.com (Steve Katz); Date: Mon, 19 Nov 2001 11:27:44 -0800; Hi Jim, K2AW Silicon Alley telephone (516) 334-7024. "Same day shipping." 8kV, 250A surge modules = $10.00/each. They're not large, I cannot imagine a "board" version being any smaller. 73, Jim! Stev; /archives//html/Amps/2001-11/msg00343.html (9,368 bytes)
283. [AMPS] 8877 rectifier board considerations (score: 1): Author: stevek@jmr.com (Steve Katz); Date: Mon, 19 Nov 2001 12:02:17 -0800; Hi Paul, There's no 6A equivalent part to the JTX1N5554. Problem is, JAN parts must be hermetically sealed by spec, and to make a 6A glass or ceramic dual-plug, metalurgically-bonded part is nearly i; /archives//html/Amps/2001-11/msg00344.html (12,071 bytes)
284. [AMPS] 8877 rectifier board considerations (score: 1): Author: stevek@jmr.com (Steve Katz); Date: Mon, 19 Nov 2001 14:33:23 -0800; -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contesting.com Administrative requests: amps-REQUEST@contesting.com Problems: owner-amps@contesting.com; /archives//html/Amps/2001-11/msg00348.html (11,030 bytes)
285. [AMPS] 8877 rectifier board considerations (score: 1): Author: stevek@jmr.com (Steve Katz); Date: Mon, 19 Nov 2001 15:06:35 -0800; Hi Rich, The K2AW modules are rated 1.0A at 55 degrees C, derating to zero at 150 degrees C. Thus, a bridge made of four such modules would have a 2.0A/55 deg C rating, attached to any surface having; /archives//html/Amps/2001-11/msg00351.html (12,794 bytes)
286. [AMPS] mark-1 (score: 1): Author: stevek@jmr.com (Steve Katz); Date: Mon, 19 Nov 2001 15:53:23 -0800; Have you tried consulting the Hubbell website (http://www.hubbell.com)? They make just about any kind of power connector. I remember the T-bolt as having a detachable power cord that was kind of a "t; /archives//html/Amps/2001-11/msg00355.html (8,420 bytes)
287. [AMPS] 8877 efficiency (score: 1): Author: stevek@jmr.com (Steve Katz); Date: Mon, 19 Nov 2001 16:27:54 -0800; I doubt it's the tube, Alfredo. You didn't describe the circuitry, but it sounds as though your 3CX800 amp is 20% more efficient than your 8877 amp! I built an 8877 for 144 MHz that provided ~60% eff; /archives//html/Amps/2001-11/msg00358.html (8,188 bytes)
288. [AMPS] HV connectors (score: 1): Author: stevek@jmr.com (Steve Katz); Date: Mon, 19 Nov 2001 16:33:27 -0800; Roger, soft and flexible silicone rubber insulated HV wire which is half the diameter of RG8's dielectric and will withstand 20kV safely is readily available and lasts decades without service or dete; /archives//html/Amps/2001-11/msg00360.html (9,960 bytes)
289. [AMPS] mark-1 (score: 1): Author: stevek@jmr.com (Steve Katz); Date: Mon, 19 Nov 2001 16:37:27 -0800; Oh. That has nothing to do with a "tuned input," so I was confused by your statement. If signals are weaker on 10m with the amp in line, sounds like a T-R relay problem. Are you noting they are weake; /archives//html/Amps/2001-11/msg00361.html (7,930 bytes)
290. [AMPS] mark-1 (score: 1): Author: stevek@jmr.com (Steve Katz); Date: Tue, 20 Nov 2001 07:41:20 -0800; [Steve Katz] Yes, not surprising. But if you go to a real electrical supply outlet (not Home Depot or an electronics store) and bring with you a sketch of the connector on the T-bolt, along with dim; /archives//html/Amps/2001-11/msg00372.html (7,728 bytes)
291. [AMPS] HV connectors (score: 1): Author: stevek@jmr.com (Steve Katz); Date: Tue, 20 Nov 2001 07:43:35 -0800; [Steve Katz] Only problem I find with RG400 is that it's very expensive (retail $2.00 per foot or higher) and very inflexible, maybe 1/4-1/8 the flexibility of RG58 which is equivalent diameter. It'; /archives//html/Amps/2001-11/msg00373.html (8,627 bytes)
292. [AMPS] HV connectors (score: 1): Author: stevek@jmr.com (Steve Katz); Date: Tue, 20 Nov 2001 07:49:51 -0800; [Steve Katz] Hi Roger! Whatever floats your boat...but I wouldn't use RG59 for 2700V, it's kinda pushing the limit. Polyethylene is a good RF dielectric but doesn't have a high DWV, and it gets wors; /archives//html/Amps/2001-11/msg00374.html (8,650 bytes)
293. [AMPS] Millen HV Connectors Factory Pricing (score: 1): Author: stevek@jmr.com (Steve Katz); Date: Tue, 20 Nov 2001 08:42:41 -0800; [Steve Katz] Not a bad deal. About the same price they were 10-15 years ago. And, despite all the naysaying here, I've been using these connector pairs on amps for at least 30 years, never seen one; /archives//html/Amps/2001-11/msg00380.html (9,194 bytes)
294. [AMPS] Millen HV Connectors Factory Pricing (score: 1): Author: stevek@jmr.com (Steve Katz); Date: Tue, 20 Nov 2001 09:45:25 -0800; [Steve Katz] The cheap 4.2kV (yellow) ones are classified as non-hydroscopic mica-filled phenolic; the more expensive 7.2kV (red and black) one are classified as non-hydroscopic linked polytetraolef; /archives//html/Amps/2001-11/msg00387.html (10,347 bytes)
295. [AMPS] Millen HV Connectors Factory Pricing (score: 1): Author: stevek@jmr.com (Steve Katz); Date: Tue, 20 Nov 2001 16:00:22 -0800; [Steve Katz] Don't know about the 1kV rating, sounds pretty skinny. But I've seen the blue corona (darkened room) around Millen HV sockets only when improper mounting hardware was used or the socket; /archives//html/Amps/2001-11/msg00394.html (10,493 bytes)
296. [AMPS] ALC connection (score: 1): Author: stevek@jmr.com (Steve Katz); Date: Mon, 26 Nov 2001 07:43:49 -0800; [Steve Katz] The antenna installed on a tower works much better than the one still in the carton in the garage. Personal experience! WB2WIK/6 To: <amps@contesting.com> -- FAQ on WWW: http://www.cont; /archives//html/Amps/2001-11/msg00432.html (10,701 bytes)
297. [AMPS] Request for Advice Please (score: 1): Author: stevek@jmr.com (Steve Katz); Date: Wed, 28 Nov 2001 08:04:48 -0800; Kevin, based on what you've said here, I'd go for the TL922 and use the audible tuning indicators to tune it carefully. For $450 it's a great deal, and even if all the caps need replacement, it's sti; /archives//html/Amps/2001-11/msg00460.html (9,588 bytes)
298. [AMPS] TS-940 and SB-200 (score: 1): Author: stevek@jmr.com (Steve Katz); Date: Wed, 28 Nov 2001 08:10:11 -0800; Use a clip lead to short out the key terminals on the SB200 and see if the relay keys and the idling current comes up to normal. That will answer your question re the SB200. Don't know if the TS940 r; /archives//html/Amps/2001-11/msg00461.html (8,799 bytes)
299. [AMPS] TS-940 and SB-200 (score: 1): Author: stevek@jmr.com (Steve Katz); Date: Wed, 28 Nov 2001 08:43:39 -0800; [Steve Katz] Maybe you have been lucky. I added a reverse polarized diode across the relay contacts in my TS850 as a kickback suppressor, and the contacts seem to be lasting okay switching 24Vdc @ 1; /archives//html/Amps/2001-11/msg00464.html (7,651 bytes)
300. [AMPS] Another Stupid Question (score: 1): Author: stevek@jmr.com (Steve Katz); Date: Thu, 29 Nov 2001 07:38:58 -0800; I always used what was most economically available, based on dielectric performance and not capacitance value...if there was a great sale on .001/10kV doorknobs, that was the obvious choice! Ditto fo; /archives//html/Amps/2001-11/msg00483.html (10,793 bytes)

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