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Total 4 documents matching your query.

1. [Amps] 3-500 / 4-400 cooling. (score: 1): Author: John E.Cleeve <g3jvc@jcleeve.idps.co.uk>; Date: Sun, 09 Oct 2005 13:06:10 +0100; Good afternoon gentlemen, I would like to re-open the discussion on the effective cooling of the pins on valves like the 3-500 and 4-400 series. Looking back through my old Eimac handbook, and ARRL h; /archives//html/Amps/2005-10/msg00198.html (10,724 bytes)
2. Re: [Amps] 3-500 / 4-400 cooling. (score: 1): Author: R.Measures <r@somis.org>; Date: Sun, 9 Oct 2005 07:40:39 -0700; Who was the mfg of said amplifier? Power level has nothing to do with emissive life. Filament-potential does and the relationship is (E1 / E2)^23.4. 3-500Z air system sockets and chimneys do not prov; /archives//html/Amps/2005-10/msg00202.html (10,237 bytes)
3. Re: [Amps] 3-500 / 4-400 cooling. (score: 1): Author: Chris Pedder <chris@g3vbl.co.uk>; Date: Sun, 09 Oct 2005 15:13:34 +0000; Perhaps that's because air system sockets were designed to be used with centrifugal blowers? But the fact remains that both the SB220 and TL-922 suffer failures due to inadequate cooling of the filam; /archives//html/Amps/2005-10/msg00204.html (7,997 bytes)
4. Re: [Amps] 3-500 / 4-400 cooling. (score: 1): Author: R.Measures <r@somis.org>; Date: Sun, 9 Oct 2005 08:53:51 -0700; Not just any centrifugal blower, one that is designed to produce high-pressure. Kooltronics makes such machines. Only when the 220's fan is not oiled, or where a 922 is operated from 50Hz and used fo; /archives//html/Amps/2005-10/msg00206.html (8,963 bytes)

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