Mail Archive Search: <+subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*\[AMPS\]\s+Filament\s+Inrush\s+Current\s+Limiting\s*$/>

Results:

References: [ +subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*\[AMPS\]\s+Filament\s+Inrush\s+Current\s+Limiting\s*$/: 11 ]

Total 11 documents matching your query.

1. [AMPS] Filament Inrush Current Limiting (score: 1): Author: Wt8r@aol.com (Wt8r@aol.com); Date: Tue, 25 Apr 2000 10:05:06 EDT; Specifically, is it necessary to limit inrush current at turn-on in a 8877 tube? If some filaments do not require current limiting, what is the characteristic of a filament which requires limiting th; /archives//html/Amps/2000-04/msg00128.html (8,217 bytes)
2. [AMPS] Filament Inrush Current Limiting (score: 1): Author: 2@vc.net (measures); Date: Tue, 25 Apr 2000 08:23:58 -0700; In one word, no. When cold, Oxide-cathode heaters have much higher resistance than do thoriated tungsten filaments. Eimac says to limit 3-500Z/8008 inrush current to no more than double the normal c; /archives//html/Amps/2000-04/msg00130.html (9,160 bytes)
3. [AMPS] Filament Inrush Current Limiting (score: 1): Author: philk5pc@tyler.net (Phil Clements); Date: Tue, 25 Apr 2000 11:49:38 -0500; There are those who will defend until death that since Eimac does not specify the need for inrush current limiting that it is not required. Most tubes are in commercial service and are not turned on; /archives//html/Amps/2000-04/msg00135.html (10,030 bytes)
4. [AMPS] Filament Inrush Current Limiting (score: 1): Author: 2@vc.net (measures); Date: Tue, 25 Apr 2000 10:17:51 -0700; Eimac specifies inrush limiting for a number of tubes. The 8973 is one of them. The 8877 is not. - Rich..., 805.386.3734, www.vcnet.com/measures. end -- FAQ on WWW: http://www.contesting.com/ampsfaq; /archives//html/Amps/2000-04/msg00138.html (8,048 bytes)
5. [AMPS] Filament Inrush Current Limiting (score: 1): Author: robrk@pgh.net (RCM); Date: Wed, 26 Apr 2000 02:30:03 -0400; What about turning down the voltage, like to half for moderate standby times (dinner). I remember reading something in some broadcast book about the standby transmitter filaments being switched to ha; /archives//html/Amps/2000-04/msg00150.html (8,021 bytes)
6. [AMPS] Filament Inrush Current Limiting (score: 1): Author: harald.gule@mimer.no (Harald Garberg Gule); Date: Wed, 26 Apr 2000 18:47:20 +0200; Some time ago I happened to own a Swedish Radio marine transmitter running 2 x QB4/1100 tubes where the filament voltage was lowered to approx. half in the stand by position. So this approach seems t; /archives//html/Amps/2000-04/msg00156.html (9,077 bytes)
7. [AMPS] Filament Inrush Current Limiting (score: 1): Author: 2@vc.net (measures); Date: Wed, 26 Apr 2000 12:51:01 -0700; This approach work ok for filament-type cathodes. For heater-type cathodes, it sounds risky to me. - later, Harald - Rich..., 805.386.3734, www.vcnet.com/measures. end -- FAQ on WWW: http://www.cont; /archives//html/Amps/2000-04/msg00159.html (8,109 bytes)
8. [AMPS] Filament Inrush Current Limiting (score: 1): Author: rfamps@ic24.net (Steve Thompson); Date: Wed, 26 Apr 2000 17:55:36 -0700; --Original Message-- From: RCM <robrk@pgh.net> To: Phil Clements <philk5pc@tyler.net> Cc: amps <amps@contesting.com> To: <amps@contesting.com> Date: 25 April 2000 23:28 Subject: Re: [AMPS] Filament I; /archives//html/Amps/2000-04/msg00169.html (8,511 bytes)
9. [AMPS] Filament Inrush Current Limiting (score: 1): Author: 2@vc.net (measures); Date: Thu, 27 Apr 2000 09:02:43 -0700; To: <amps@contesting.com> Not enough heater potential causes the oxide coating to flake off the cathode. cheers, Steve - Rich..., 805.386.3734, www.vcnet.com/measures. end -- FAQ on WWW: http://www.; /archives//html/Amps/2000-04/msg00171.html (8,815 bytes)
10. [AMPS] Filament Inrush Current Limiting (score: 1): Author: rfamps@ic24.net (Steve Thompson); Date: Fri, 28 Apr 2000 07:48:22 +0100; To: <amps@contesting.com> somesuch. I can see that this happens if you draw current from a cathode that's too cold, but does it do any damage in standby? Steve -- FAQ on WWW: http://www.contesting.co; /archives//html/Amps/2000-04/msg00176.html (9,295 bytes)
11. [AMPS] Filament Inrush Current Limiting (score: 1): Author: 2@vc.net (measures); Date: Fri, 28 Apr 2000 00:58:19 -0700; To: <amps@contesting.com> To: <amps@contesting.com> Correct - there is no damage until cathode current flows in an insufficienty heated cathode. . No cheers, Steve - Rich..., 805.386.3734, www.vcnet; /archives//html/Amps/2000-04/msg00178.html (9,656 bytes)

Current List: 1 - 11
Page: [1]