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1. [Amps] Fw: Step Start on a 3KA Amp (score: 1): Author: PA3DUV <pa3duv@planet.nl>; Date: Thu, 21 Sep 2006 07:30:53 +0200; _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps; /archives//html/Amps/2006-09/msg00255.html (8,268 bytes)
2. Re: [Amps] Fw: Step Start on a 3KA Amp (score: 1): Author: PA3DUV <pa3duv@planet.nl>; Date: Thu, 21 Sep 2006 13:39:23 +0200; Thats right Harold. But when one switches the amp on the switching of the triac can be heard on the HF transceiver. However, this is not really an issue since it disappears in approx. 2 seconds. I ha; /archives//html/Amps/2006-09/msg00256.html (8,147 bytes)
3. Re: [Amps] Fw: Step Start on a 3KA Amp (score: 1): Author: "Tom W8JI" <w8ji@w8ji.com>; Date: Thu, 21 Sep 2006 09:07:59 -0400; Hal, Unfortunately a zero crosser does not do anything for inrush. It is good for the switch, but that's all. To limit inrush you have to add series resistance so current is limited over some time p; /archives//html/Amps/2006-09/msg00259.html (7,459 bytes)
4. Re: [Amps] Fw: Step Start on a 3KA Amp (score: 1): Author: PA3DUV <pa3duv@planet.nl>; Date: Thu, 21 Sep 2006 17:37:33 +0200; Hal, The softstarter in the Emtron amps is a phase control triac system, not a zero crosser. It allows gradually more of the primary AC sinewave into the powersupply. By doing so there is no need for; /archives//html/Amps/2006-09/msg00263.html (8,557 bytes)
5. Re: [Amps] Fw: Step Start on a 3KA Amp (score: 1): Author: jeff millar <wa1hco@adelphia.net>; Date: Thu, 21 Sep 2006 18:25:17 -0400; I tried the zero crossing switch on two HV power supplies (8877 and GS35B), both power up just fine, nice and quiet, no blinking lights. Using a zero crossing switch makes a significant difference co; /archives//html/Amps/2006-09/msg00273.html (8,256 bytes)
6. Re: [Amps] Fw: Step Start on a 3KA Amp (score: 1): Author: "Tom W8JI" <w8ji@w8ji.com>; Date: Thu, 21 Sep 2006 20:34:04 -0400; If your supply fully and smoothly charges in one quarter cycle and only draws 20 amps while doing it that is a miracle Jeff. You either have a supply with horrible ESR or you are missing something.; /archives//html/Amps/2006-09/msg00277.html (8,578 bytes)
7. Re: [Amps] Fw: Step Start on a 3KA Amp (score: 1): Author: jeff millar <wa1hco@adelphia.net>; Date: Fri, 22 Sep 2006 17:15:39 -0400; You clipped the test conditions from my original email In some modeling with a 4000V supply with 50 Ohms equivalent series secondary resistance and 20 uFd of capacitance, the single cycle peak capaci; /archives//html/Amps/2006-09/msg00287.html (10,013 bytes)
8. Re: [Amps] Fw: Step Start on a 3KA Amp (score: 1): Author: "Tom W8JI" <w8ji@w8ji.com>; Date: Fri, 22 Sep 2006 22:04:20 -0400; Hi Jeff, I get about six amps peak current in the diodes with a 1 amp load, and a start up current starting at zero of 23 amps into the cap. That 23 amps has to come from the power line, and is incre; /archives//html/Amps/2006-09/msg00288.html (10,141 bytes)

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