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References: [ +subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*\[AMPS\]\s+HV\s+Fusing\s+\/\s+Diode\s+Protection\s*$/: 18 ]

Total 18 documents matching your query.

1. [AMPS] HV Fusing / Diode Protection (score: 1): Author: 2@vc.net (measures); Date: Sun, 23 Jul 2000 11:32:31 -0700; long ? When a resistor explodes, there is a flash over. ......... - Rich..., 805.386.3734, www.vcnet.com/measures. end -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contesting.; /archives//html/Amps/2000-07/msg00139.html (7,263 bytes)
2. [AMPS] HV Fusing / Diode Protection (score: 1): Author: nq5t@home.com (Grant Youngman); Date: Mon, 12 Jun 2000 09:45:24 -0500; In the L4-B power supply, Drake used an IRC type BWH/SPH "fail-safe" resistor (0.82 ohms/2W) as a fuse to protect the diode strings in the event of a short or closure of the RF deck cabinet interlock; /archives//html/Amps/2000-06/msg00105.html (8,602 bytes)
3. [AMPS] HV Fusing / Diode Protection (score: 1): Author: siezzi@aeronix.com (Steve Iezzi); Date: Mon, 12 Jun 2000 10:59:32 -0400; I have used the Metal Oxide resistors available in Digi-Key (Panasonic and Yageo) for the same purpose. They are flame retardant and handle high surge currents. 0.82 ohms is listed as a stock value i; /archives//html/Amps/2000-06/msg00107.html (8,437 bytes)
4. [AMPS] HV Fusing / Diode Protection (score: 1): Author: philk5pc@tyler.net (Phil Clements); Date: Mon, 12 Jun 2000 10:09:48 -0500; Take a single strand out of a piece of small stranded hook-up wire, and solder it across a 2 watt resistor. The purist can adjust the wire size so it will melt at the desired current. GL! (((73))) Ph; /archives//html/Amps/2000-06/msg00108.html (9,781 bytes)
5. [AMPS] HV Fusing / Diode Protection (score: 1): Author: kb7ww@chatusa.com (KB7WW Art Moe); Date: Mon, 12 Jun 2000 15:15:25 -0700; Phil and all. Why the resistor ??? Art KB7WW -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contesting.com Administrative requests: amps-REQUEST@contesting.com Problems: owner-am; /archives//html/Amps/2000-06/msg00109.html (10,689 bytes)
6. [AMPS] HV Fusing / Diode Protection (score: 1): Author: philk5pc@tyler.net (Phil Clements); Date: Mon, 12 Jun 2000 10:29:39 -0500; The resistor is just for cosmetics...Drake collectors are finicky about these things! (((73))) Phil, K5PC -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contesting.com Administra; /archives//html/Amps/2000-06/msg00110.html (8,340 bytes)
7. [AMPS] HV Fusing / Diode Protection (score: 1): Author: 2@vc.net (measures); Date: Mon, 12 Jun 2000 11:04:47 -0700; But not this much surge current. An arc has only about 20v drop across it. Thus, in a 2500V circuit, it hardly limits current at all. A glitch resistor must be robust enough to suffer no damage duri; /archives//html/Amps/2000-06/msg00117.html (9,477 bytes)
8. [AMPS] HV Fusing / Diode Protection (score: 1): Author: 2@vc.net (measures); Date: Mon, 12 Jun 2000 11:04:50 -0700; ? A 0.82-ohm, 2w glitch resistor is not good engineering practice. it can not possibly limit fault current to a safe value. later, Phil - Rich..., 805.386.3734, www.vcnet.com/measures. end -- FAQ on; /archives//html/Amps/2000-06/msg00118.html (9,090 bytes)
9. [AMPS] HV Fusing / Diode Protection (score: 1): Author: 2@vc.net (measures); Date: Mon, 12 Jun 2000 11:04:51 -0700; Yes. The ''glitch'' resistor. A glitch resistor limits fault current. It is not a fuse. It must be able to discharge the hv supply filter C without sustaining any damage. A fusable link does not lim; /archives//html/Amps/2000-06/msg00119.html (9,775 bytes)
10. [AMPS] HV Fusing / Diode Protection (score: 1): Author: N6BUU@aol.com (N6BUU@aol.com); Date: Mon, 12 Jun 2000 14:25:35 EDT; << Yes. The ''glitch'' resistor. A glitch resistor limits fault current. It is not a fuse. It must be able to discharge the hv supply filter C without sustaining any damage. RICH: IN MY 30L-1 COLLINS; /archives//html/Amps/2000-06/msg00121.html (8,925 bytes)
11. [AMPS] HV Fusing / Diode Protection (score: 1): Author: nq5t@home.com (Grant Youngman); Date: Mon, 12 Jun 2000 13:57:47 -0500; Ok, I'm confused. Per the L4-B manual, "In the event of a short circuit, resistor R-12 [the one we're talking about] ... will be destroyed. The resistor protects the diodes in the power supply ...."; /archives//html/Amps/2000-06/msg00122.html (9,177 bytes)
12. [AMPS] HV Fusing / Diode Protection (score: 1): Author: philk5pc@tyler.net (Phil Clements); Date: Mon, 12 Jun 2000 16:41:28 -0500; You are getting advice you do not need, Grant. The .82 ohm resistor is not for glitch protection, as some have assumed without looking at the L-4B schematic. It is exactly for the purpose you mention; /archives//html/Amps/2000-06/msg00124.html (10,293 bytes)
13. [AMPS] HV Fusing / Diode Protection (score: 1): Author: gdaught6@leland.Stanford.EDU (George T. Daughters); Date: Mon, 12 Jun 2000 15:12:20 +0008; Phil wrote... < snip > Not quite. The energy stored in the filter capacitors depends only on the (filter) capacitance and the voltage to which it is charged. The glitch resistor limits the CURRENT in; /archives//html/Amps/2000-06/msg00125.html (9,398 bytes)
14. [AMPS] HV Fusing / Diode Protection (score: 1): Author: 2@vc.net (measures); Date: Mon, 12 Jun 2000 21:46:01 -0700; There is no peak current limiting afforded by an exploding resistor. - Rich..., 805.386.3734, www.vcnet.com/measures. end -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contesti; /archives//html/Amps/2000-06/msg00129.html (9,061 bytes)
15. [AMPS] HV Fusing / Diode Protection (score: 1): Author: 2@vc.net (measures); Date: Mon, 12 Jun 2000 21:46:03 -0700; No clue, HANK - Rich..., 805.386.3734, www.vcnet.com/measures. end -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contesting.com Administrative requests: amps-REQUEST@contesting; /archives//html/Amps/2000-06/msg00130.html (9,139 bytes)
16. [AMPS] HV Fusing / Diode Protection (score: 1): Author: Peter_Chadwick@mitel.com (Peter Chadwick); Date: Tue, 13 Jun 2000 09:41:39 +0100; The arcs are likely to be enough strain on the diodes, transformer and capacitors that mayhap you need good supply of those, too. Not every time, of course. Also, you need a mechanical arrangement so; /archives//html/Amps/2000-06/msg00138.html (8,495 bytes)
17. [AMPS] HV Fusing / Diode Protection (score: 1): Author: 2@vc.net (measures); Date: Tue, 13 Jun 2000 09:34:32 -0700; ... length helps because it lower the V gradient. Two 10w resistors in series are better than one 25w resistor. cheers, Peter - Rich..., 805.386.3734, www.vcnet.com/measures. end -- FAQ on WWW: http; /archives//html/Amps/2000-06/msg00150.html (8,496 bytes)
18. [AMPS] HV Fusing / Diode Protection (score: 1): Author: Peter_Chadwick@mitel.com (Peter Chadwick); Date: Tue, 13 Jun 2000 17:47:37 +0100; Very true - I use one resistor in the present PSU, but it's about 6 inches long and 1-1/2 inch diameter, though. (Over the years, I've collected physically big vitreous enamelled resistors of 50 watt; /archives//html/Amps/2000-06/msg00151.html (9,581 bytes)

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