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1. [Amps] GS1B / GS31B life span? and DC heater voltages (score: 1): Author: JEREMY ENGBROCK via Amps <amps@contesting.com>; Date: Thu, 4 May 2017 12:20:49 +0000 (UTC); I have recently purchased a set of GS1B tubes that were listed as GS31B tubes. The main difference as far as I can tell is the GS1B spec sheet says the rated life is over 250 hours and the GS31B life; /archives//html/Amps/2017-05/msg00050.html (8,576 bytes)
2. Re: [Amps] GS1B / GS31B life span? and DC heater voltages (score: 1): Author: Alek Petkovic <vk6apk@bigpond.com>; Date: Fri, 05 May 2017 06:35:43 +0800; I think those tubes were strictly made for military use and that those ratings are for inside a tank or war plane. They probably pulled the tubes after that many hours. 73, Alek. VK6APK On 4/05/2017; /archives//html/Amps/2017-05/msg00058.html (9,718 bytes)

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