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21. Re: [TenTec] Centurion Amplifier history (score: 1): Author: Kimberly Elmore <cw_de_n5op@sbcglobal.net>; Date: Thu, 15 Mar 2012 12:54:36 -0700 (PDT); I've heard all sorts of variations on "burn-in." Is the appropriate burn-in different for thoriated tungsten cathodes vs. oxide cathodes? What's an authoritative recommendation? Kim N5OP It has alway; /archives//html/TenTec/2012-03/msg00163.html (9,845 bytes)
22. Re: [TenTec] Centurion Amplifier history (score: 1): Author: "jack" <jfriend31@comcast.net>; Date: Thu, 15 Mar 2012 18:39:39 -0600; years ago when Eimac was here in SLC, Utah, I visited the place a few times. Vern Campbell and Irwis Isgitt were two hams I knew there. Vern was in charge of testing the 3- series of tubes at the tim; /archives//html/TenTec/2012-03/msg00164.html (11,209 bytes)
23. Re: [TenTec] Centurion Amplifier history (score: 1): Author: Stuart Rohre <rohre@arlut.utexas.edu>; Date: Thu, 15 Mar 2012 19:48:41 -0500; For Kim and those interested in burn in of power tubes: Likely a University that has an engineering school would have back issues in the Tech Library of RCA Reviews, or other old tube company technic; /archives//html/TenTec/2012-03/msg00165.html (9,907 bytes)
24. Re: [TenTec] Centurion Amplifier history (score: 1): Author: carboyhat@juno.com; Date: Fri, 16 Mar 2012 06:11:35 -0400; Kim, Check out W8JI.com and go down to vacuum tubes in amplifiers article. He gets into the topic of activating the 'getter' in tubes to remove oxygen. _______________________________________________; /archives//html/TenTec/2012-03/msg00168.html (8,979 bytes)
25. Re: [TenTec] Centurion Amplifier history (score: 1): Author: Kim Elmore <cw_de_n5op@sbcglobal.net>; Date: Fri, 16 Mar 2012 06:58:20 -0500; Ah, yes! That much I'm familiar with. For example, the older 3-500z anodes had zirconium on their exterior surface that acts as a getter when it's hot enough (glowing red). W8JI's pages are excellent; /archives//html/TenTec/2012-03/msg00169.html (9,914 bytes)

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