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1. [Amps] Step start resistors (score: 1): Author: peter.chadwick@Zarlink.Com; Date: Mon, 5 Jan 2004 11:41:21 +0000; Any ideas on what values to use for step start resistors? In the past, I've tended to choose a value from the available stock - something like 50 ohms, 100 watts, which limits the surge current to ju; /archives//html/Amps/2004-01/msg00043.html (6,710 bytes)
2. Re: [Amps] Step start resistors (score: 1): Author: R.Measures <r@somis.org>; Date: Mon, 5 Jan 2004 05:31:52 -0800; ** I use a minimum value of R that - when added to the transformer primary R - does not exceed the mains circuit-breaker (or fuse) ampere rating. For example, a Heath SB-220 has 10A breakers and c. 2; /archives//html/Amps/2004-01/msg00046.html (8,594 bytes)
3. Re: [Amps] Step start resistors (score: 1): Author: Radio WC6W <wc6w@juno.com>; Date: Mon, 5 Jan 2004 09:11:03 -0800; <snip> Hi Peter, I've been using 120 ohms @ 50W as of late. This keeps the inrush very peaceful. There is no "rush" since my indirectly heated tubes aren't going to be doing anything for a couple min; /archives//html/Amps/2004-01/msg00052.html (7,810 bytes)
4. Re: [Amps] Step start resistors (score: 1): Author: "Ian White, G3SEK" <G3SEK@ifwtech.co.uk>; Date: Mon, 5 Jan 2004 17:07:17 +0000; Any ideas on what values to use for step start resistors? In the past, I've tended to choose a value from the available stock - something like 50 ohms, 100 watts, which limits the surge current to ju; /archives//html/Amps/2004-01/msg00053.html (10,252 bytes)
5. Re: [Amps] Step start resistors (score: 1): Author: R.Measures <r@somis.org>; Date: Mon, 5 Jan 2004 09:56:21 -0800; ** Which is taken care of if relay pull-in is set so that it occurs when the filter caps are at c. 2/3rd of max potential. _______________________________________________ Amps mailing list Amps@cont; /archives//html/Amps/2004-01/msg00054.html (10,813 bytes)
6. Re: [Amps] Step start resistors (score: 1): Author: "K7RDX" <k7rdx@earthlink.net>; Date: Mon, 5 Jan 2004 13:12:01 -0800; Most ops here in the good ol USA don`t have a problem with house lights diming when powering up our amps....We usually run the psu from a dedicated 240vac line....At least that`s my way here in Centr; /archives//html/Amps/2004-01/msg00055.html (12,237 bytes)
7. Re: [Amps] Step start resistors (score: 1): Author: "Ian White, G3SEK" <G3SEK@ifwtech.co.uk>; Date: Mon, 5 Jan 2004 21:51:41 +0000; K7RDX wrote: Most ops here in the good ol USA don`t have a problem with house lights diming when powering up our amps.... Sorry, I didn't mean serious dimming, you might only see a slight flicker. We; /archives//html/Amps/2004-01/msg00058.html (9,000 bytes)
8. Re: [Amps] Step start resistors (score: 1): Author: "K7RDX" <k7rdx@earthlink.net>; Date: Mon, 5 Jan 2004 16:32:01 -0800; _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps; /archives//html/Amps/2004-01/msg00061.html (9,345 bytes)
9. Re: [Amps] Step start resistors (score: 1): Author: "Marcinio Afonso Stabile" <marcinio@terra.com.br>; Date: Wed, 7 Jan 2004 18:05:53 -0300; Hi Peter! I am using thermistors as inrush current limiters, for a variable frequency AC drives, in a pre-charge system, to limit the charging current on the DC bus capacitors. More information at Am; /archives//html/Amps/2004-01/msg00079.html (9,774 bytes)
10. Re: [Amps] Step start resistors (score: 1): Author: "Barry Kirkwood" <bjk@ihug.co.nz>; Date: Wed, 7 Jan 2004 20:57:39 -0000; Guess value of surge limiting resistor is an empirical question, start with high value, observe response on scope.... Thought : use of incandescent lamp as resistor. Understand that tungsten filament; /archives//html/Amps/2004-01/msg00080.html (11,626 bytes)
11. Re: [Amps] Step start resistors (score: 1): Author: "Phil Clements" <philk5pc@tyler.net>; Date: Wed, 7 Jan 2004 15:16:34 -0600; A cheap trick I use for filament current limiting was "borrowed" from Henry. If your filament voltage is a bit high, or you have a tapped filament transformer, or better yet, a variac, just insert a; /archives//html/Amps/2004-01/msg00082.html (9,115 bytes)
12. Re: [Amps] Step start resistors (score: 1): Author: R.Measures <r@somis.org>; Date: Wed, 7 Jan 2004 14:40:19 -0800; ** Starting with a resistance that will limit current to the circuit-breaker rating will get one in the ballpark. ** You are correct, Barry _______________________________________________ Amps maili; /archives//html/Amps/2004-01/msg00084.html (11,645 bytes)

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