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1. [AMPS] filament life again (score: 1): Author: w4eto@rmi.net (Richard W. Ehrhorn); Date: Tue, 30 Nov 1999 21:36:55 -0700; Hello John... ETO had some life data on the 8877s used in our MRI amplifiers by GE Medical, Philips Medical and others. It was presented as a curve as number of tube failures due to all causes (per m; /archives//html/Amps/1999-11/msg00004.html (11,844 bytes)
2. [AMPS] filament life again (score: 1): Author: jtml@lanl.gov (John Lyles); Date: Mon, 29 Nov 1999 19:05:36 -0700; Thoriated Tungsten vs oxide cathodes Both. Although the mechanical changes in TT filaments in larger tubes with handles are more prone to failure than the lower power heaters of oxide cathodes. For i; /archives//html/Amps/1999-11/msg00552.html (9,994 bytes)

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