Mail Archive Search: <+subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*\[Amps\]\s+Step\-Starts\s*$/>

Results:

References: [ +subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*\[Amps\]\s+Step\-Starts\s*$/: 9 ]

Total 9 documents matching your query.

1. [Amps] Step-Starts (score: 1): Author: "Harold B. Mandel" <ka1xo@juno.com>; Date: Sat, 13 Aug 2005 07:58:38 -0400; Gents, In building step-start units to ease the trauma of powering up various amplifiers a number of issues were addressed: The filter capacitors present an almost dead short when first being charged; /archives//html/Amps/2005-08/msg00459.html (7,618 bytes)
2. Re: [Amps] Step-Starts (score: 1): Author: Steve Thompson <g8gsq@ic24.net>; Date: Sat, 13 Aug 2005 14:16:08 +0100; My personal views: Running against most opinions, I see no problem in having a 'long' soft start - where there's going to be insignificant power drawn from the supply until after the soft start is ov; /archives//html/Amps/2005-08/msg00460.html (7,616 bytes)
3. Re: [Amps] Step-Starts (score: 1): Author: R.Measures <r@somis.org>; Date: Sat, 13 Aug 2005 06:30:56 -0700; The rectifiers are typically not the weak part, it's the power contactor's contacts (or switch in smaller amplifiers) that connects the mains to the HV xfmr. For example, the first component to fail-; /archives//html/Amps/2005-08/msg00461.html (9,980 bytes)
4. Re: [Amps] Step-Starts (score: 1): Author: "Jim Forsyth" <jim@forsyth.net>; Date: Sat, 13 Aug 2005 08:06:56 -0700; When switching from 2.5kV to 4kV the capacitors once again look like a dead short so now you are applying 1.5kV to a short as compared to the original 2.5kV to a short. Not a huge difference in the; /archives//html/Amps/2005-08/msg00464.html (7,030 bytes)
5. Re: [Amps] Step-Starts (score: 1): Author: "Peter Chadwick" <g3rzp@g3rzp.wanadoo.co.uk>; Date: Sat, 13 Aug 2005 18:22:53 +0100; I choose a capacitor for the delay on what looks reasonable and leave it to sort itself out.........The delay on the present amp is about 5 seconds: the series resistor is a 50 ohm 200 watt vitreous; /archives//html/Amps/2005-08/msg00466.html (7,525 bytes)
6. Re: [Amps] Step-Starts (score: 1): Author: R.Measures <r@somis.org>; Date: Sat, 13 Aug 2005 10:49:54 -0700; The lights blink less with a 2500v headstart than starting from 0v. Actually, a filter capacitor looks like a dead short 120 times a second during normal operation. Richard L. Measures, AG6K, 805.386; /archives//html/Amps/2005-08/msg00467.html (8,015 bytes)
7. Re: [Amps] Step-Starts (score: 1): Author: John Irwin <crazytvjohn@yahoo.com>; Date: Sat, 13 Aug 2005 12:08:38 -0700 (PDT); On my power supply which I am finishing up,has a adjustable period before the 30 amp contactor shorts the 100ohm 50 watt dale resistor. With a microwave analyzer reading the 3000 volts dc. power on s; /archives//html/Amps/2005-08/msg00469.html (11,285 bytes)
8. Re: [Amps] Step-Starts (score: 1): Author: "Phil Clements" <philc@texascellnet.com>; Date: Sat, 13 Aug 2005 16:04:02 -0500; If you have chosen the proper size contactors for the step-start and the step-start resistor(s) are robust enough, no damage will occur. The only damage will be to one's ego as the visitor's chortli; /archives//html/Amps/2005-08/msg00471.html (8,121 bytes)
9. Re: [Amps] Step-Starts (score: 1): Author: "Jim Forsyth" <jim@forsyth.net>; Date: Sat, 13 Aug 2005 14:21:17 -0700; Not relevant because the voltage applied across the short 120 times a second is not very high. _______________________________________________ Amps mailing list Amps@contesting.com http://lists.cont; /archives//html/Amps/2005-08/msg00476.html (7,777 bytes)

Current List: 1 - 9
Page: [1]