Mail Archive Search: <+subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*\[AMPS\]\s+SB\-220\s+Glitch\s+Resistor\s+\?\?\?\s*$/>

Results:

References: [ +subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*\[AMPS\]\s+SB\-220\s+Glitch\s+Resistor\s+\?\?\?\s*$/: 59 ]

Total 59 documents matching your query.

21. [AMPS] SB-220 Glitch Resistor ??? (score: 1): Author: rjohnson@ici.net (Bob Johnson); Date: Mon, 27 Nov 2000 18:04:27 -0500; Hi: I'm getting ready to put a NEW old SB-220 on the air that has been sitting around unused for 15 years. The unit has been slowly brought up on a variac and run for a week with the plate connection; /archives//html/Amps/2000-11/msg00390.html (8,972 bytes)
22. [AMPS] SB-220 Glitch Resistor ??? (score: 1): Author: Ian White, G3SEK" <g3sek@ifwtech.com (Ian White, G3SEK); Date: Tue, 28 Nov 2000 07:44:54 +0000; Not cast in stone. Eimac recommend a resistor that would limit the peak short-circuit current out of the power supply to 40A (for tubes up to 1500W dissipation). So for example, if the B+ is 2.5kV, a; /archives//html/Amps/2000-11/msg00394.html (11,026 bytes)
23. SV: [AMPS] SB-220 Glitch Resistor ??? (score: 1): Author: sm5ki@algonet.se (sm5ki); Date: Tue, 28 Nov 2000 09:28:52 +0100; How about a thyristor in paralell with the hi voltage? You make a simple STEPUP ignition transformer by simply passing the B plus lead through a multiturn coil. An old idea from an old SHORT WAVE MAG; /archives//html/Amps/2000-11/msg00395.html (12,732 bytes)
24. SV: [AMPS] SB-220 Glitch Resistor ??? (score: 1): Author: Ian White, G3SEK" <g3sek@ifwtech.com (Ian White, G3SEK); Date: Tue, 28 Nov 2000 10:39:18 +0000; This keeps on coming around. OE5JFL now has an English-language version of his thyristor crowbar on his own site, with readable schematics: http://www.qsl.net/oe5jfl/flashover.htm That solution is be; /archives//html/Amps/2000-11/msg00396.html (9,221 bytes)
25. SV: [AMPS] SB-220 Glitch Resistor ??? (score: 1): Author: i4jmy@iol.it (i4jmy@iol.it); Date: Tue, 28 Nov 2000 15:47:02 +0100; Statistically, the overall reliability is also an inverse function of the number of components used. The point if adopting some newer and more complex circuit, other than for didactical purposes, sho; /archives//html/Amps/2000-11/msg00397.html (10,751 bytes)
26. [AMPS] SB-220 Glitch Resistor ??? (score: 1): Author: 2@vc.net (measures); Date: Tue, 28 Nov 2000 07:15:39 -0800; The old capacitors were 200pF. In order to use a grid fuse, the total grid bypass needs be c. 1500pF. Whatever it takes to limit the fault current to under 200a, plus the ability to carry 800mA duri; /archives//html/Amps/2000-11/msg00398.html (11,088 bytes)
27. [AMPS] SB-220 Glitch Resistor ??? (score: 1): Author: 2@vc.net (measures); Date: Tue, 28 Nov 2000 07:15:42 -0800; Sound advice. Not sound advice. The Heath HV supply is not capable of generating 40A @3000v. end - Rich..., 805.386.3734, www.vcnet.com/measures. end -- FAQ on WWW: http://www.contesting.com/FAQ/amp; /archives//html/Amps/2000-11/msg00399.html (11,845 bytes)
28. SV: [AMPS] SB-220 Glitch Resistor ??? (score: 1): Author: Wlfuqu00@pop.uky.edu (William Fuqua); Date: Tue, 28 Nov 2000 10:15:33 -0500; I was thinking that perhaps a simpler approach would be to have a glitch resistor of low wattage (in B+ line) such that if you had an arc over in the tube the resistor would quickly self destruct. If; /archives//html/Amps/2000-11/msg00401.html (9,695 bytes)
29. SV: [AMPS] SB-220 Glitch Resistor ??? (score: 1): Author: 2@vc.net (measures); Date: Tue, 28 Nov 2000 07:22:40 -0800; Omitting the glitch resistor is like going boating with no life jacket. cheers, Mauri - Rich..., 805.386.3734, www.vcnet.com/measures. end -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissio; /archives//html/Amps/2000-11/msg00402.html (9,451 bytes)
30. SV: [AMPS] SB-220 Glitch Resistor ??? (score: 1): Author: i4jmy@iol.it (i4jmy@iol.it); Date: Tue, 28 Nov 2000 16:55:18 +0100; My point was: "is it worth the effort to replace a rough but simple resistor with a more complex circuit using of active and passive components ?" 73 Mauri I4JMY of than of jacket. -- FAQ on WWW: htt; /archives//html/Amps/2000-11/msg00403.html (10,296 bytes)
31. SV: [AMPS] SB-220 Glitch Resistor ??? (score: 1): Author: 2@vc.net (measures); Date: Tue, 28 Nov 2000 10:40:04 -0800; good question, Mauri. - 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@co; /archives//html/Amps/2000-11/msg00406.html (9,345 bytes)
32. SV: [AMPS] SB-220 Glitch Resistor ??? (score: 1): Author: 2@vc.net (measures); Date: Tue, 28 Nov 2000 10:40:06 -0800; The metal vapour arc of an exploding resistor is unlikely to limit peak fault current. not necessarily I would select a resistor that could withstand the fault current without damage. end - Rich...,; /archives//html/Amps/2000-11/msg00407.html (9,906 bytes)
33. SV: [AMPS] SB-220 Glitch Resistor ??? (score: 1): Author: N6BUU@aol.com (N6BUU@aol.com); Date: Tue, 28 Nov 2000 13:53:03 EST; << good question, Mauri. - Rich..., 805.386.3734, www.vcnet.com/measures. end LESS IS BETTER! HANK, N6BUU -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contesting.com Administra; /archives//html/Amps/2000-11/msg00409.html (9,418 bytes)
34. SV: [AMPS] SB-220 Glitch Resistor ??? (score: 1): Author: Ian White, G3SEK" <g3sek@ifwtech.com (Ian White, G3SEK); Date: Tue, 28 Nov 2000 17:42:23 +0000; The main advantage is in reducing the risk to an expensive tube. That's why I haven't got around to building OE5JFL's circuit yet - GS35Bs are cheap! On the other hand, many UHF QRO operators use TV; /archives//html/Amps/2000-11/msg00410.html (11,942 bytes)
35. [AMPS] SB-220 Glitch Resistor ??? (score: 1): Author: Ian White, G3SEK" <g3sek@ifwtech.com (Ian White, G3SEK); Date: Tue, 28 Nov 2000 17:30:56 +0000; Nobody but you imagined it was. But *some* HV power supplies with high-rated mains fuses will keep going for long enough to burn out the glitch resistor... and then the HV pops up again. 73 from Ian; /archives//html/Amps/2000-11/msg00411.html (10,102 bytes)
36. [AMPS] SB-220 Glitch Resistor ??? (score: 1): Author: 2@vc.net (measures); Date: Tue, 28 Nov 2000 13:36:53 -0800; selecting a glitch R that can be burnt out by a dead short is Not good engineering practice. Mr. White -- How can the HV "pop up" if the burned out glitch resistor is in Series with the HV supply, ?; /archives//html/Amps/2000-11/msg00412.html (10,157 bytes)
37. SV: [AMPS] SB-220 Glitch Resistor ??? (score: 1): Author: 2@vc.net (measures); Date: Tue, 28 Nov 2000 13:36:55 -0800; If the glitch R can not withstand the dreaded "screwdriver test", a more substantial glitch R is needed. cheers, Bill - Rich..., 805.386.3734, www.vcnet.com/measures. end -- FAQ on WWW: http://www.c; /archives//html/Amps/2000-11/msg00413.html (11,267 bytes)
38. SV: [AMPS] SB-220 Glitch Resistor ??? (score: 1): Author: w.knol@niwa.cri.nz (Wilbert Knol); Date: Wed, 29 Nov 2000 16:21:26 1300; I had a look at the OE5JFL crowbar. It looks like a good idea. But I would still use the glitch resistor. The cascaded thyristor network looks a bit dubious though. The ones slowest to fire could fa; /archives//html/Amps/2000-11/msg00420.html (9,263 bytes)
39. SV: [AMPS] SB-220 Glitch Resistor ??? (score: 1): Author: Ian White, G3SEK" <g3sek@ifwtech.com (Ian White, G3SEK); Date: Wed, 29 Nov 2000 07:58:46 +0000; The 10 ohm resistor in the negative return has many of the functions of the glitch resistor, along with the inductor in the B+ lead. Those two components limit the peak surge current, and are also wh; /archives//html/Amps/2000-11/msg00425.html (11,751 bytes)
40. [AMPS] SB-220 Glitch Resistor ??? (score: 1): Author: Ian White, G3SEK" <g3sek@ifwtech.com (Ian White, G3SEK); Date: Wed, 29 Nov 2000 07:20:21 +0000; I agree with you that it's bad practice to use a small glitch resistor instead of an HV fuse. In the case I'm thinking of, the glitch resistor was sensibly rated for power dissipation in normal opera; /archives//html/Amps/2000-11/msg00426.html (11,034 bytes)

Current List: 21 - 40
Page: [1] [2] [3]