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1. Re: [Amps] 4-250A and interesting socket information. (score: 1): Author: Bill Fuqua <wlfuqu00@uky.edu>; Date: Wed, 25 Aug 2004 08:58:45 -0400; The specifications for the 4-250A are the same as the 4-400A except for the plate dissipation. The 4-400A has fins added to the anode. I prefer the 4-250A tubes when I have an amplifier with a window; /archives//html/Amps/2004-08/msg00289.html (8,169 bytes)
2. Re: [Amps] 4-250A and interesting socket information. (score: 1): Author: R.Measures <r@somis.org>; Date: Wed, 25 Aug 2004 06:56:07 -0700; On Aug 25, 2004, at 5:58 AM, Bill Fuqua wrote: The specifications for the 4-250A are the same as the 4-400A except for the plate dissipation. The 4-400A has fins added to the anode. I prefer the 4-25; /archives//html/Amps/2004-08/msg00291.html (8,353 bytes)
3. Re: [Amps] 4-250A and interesting socket information. (score: 1): Author: Bill Fuqua <wlfuqu00@uky.edu>; Date: Wed, 25 Aug 2004 10:29:31 -0400; My first experience with real anode glow was when I built my fist amplifiers as a teenage ham.I first acquires a old AM transmitter in Miami, Fl at a store called Ham Shack Electronics ( I think).Thi; /archives//html/Amps/2004-08/msg00294.html (8,595 bytes)
4. Re: [Amps] 4-250A and interesting socket information. (score: 1): Author: jsb@digistar.com; Date: Wed, 25 Aug 2004 11:32:30 -0400 (EDT); How were these tubes cared for in the days when they were in typical usage during wartime, etc.? Seems like a tube that got that hot wouldn't last long under battle conditions. 73 Jason N1SU ________; /archives//html/Amps/2004-08/msg00298.html (7,878 bytes)
5. Re: [Amps] 4-250A and interesting socket information. (score: 1): Author: Bill Fuqua <wlfuqu00@uky.edu>; Date: Wed, 25 Aug 2004 12:11:24 -0400; For one thing the transmitters that used these tubes were mostly used in fixed communications sites. Or in Shelters that were placed at some location and did not move often. 250th tubes were shipped; /archives//html/Amps/2004-08/msg00300.html (9,008 bytes)
6. Re: [Amps] 4-250A and interesting socket information. (score: 1): Author: Roger Parsons <ve3zi@yahoo.com>; Date: Wed, 25 Aug 2004 19:52:59 +0100 (BST); ... wartime, etc.? Seems like a tube that got that hot wouldn't last long under battle conditions.... I have the remains of an ex-military Marconi transmitter which used a pair of 4-125 tubes. It has; /archives//html/Amps/2004-08/msg00306.html (7,018 bytes)

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