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Total 3 documents matching your query.

1. [Amps] SB-220 filament pin cooling was: Re: Replacing 3-500Z tubes with 4-400A tubes (score: 1): Author: Pete Smith <n4zr@contesting.com>; Date: Wed, 07 Dec 2011 06:48:46 -0500; I have had recurrent trouble with filament pins coming unsoldered in my SB-220 during heavy contest operation, even though I have the replacement Harbach fan that is supposed to move something like 3; /archives//html/Amps/2011-12/msg00059.html (12,238 bytes)
2. Re: [Amps] SB-220 filament pin cooling was: Re: Replacing 3-500Z tubes with 4-400A tubes (score: 1): Author: "Carl" <km1h@jeremy.mv.com>; Date: Wed, 7 Dec 2011 12:33:07 -0500; Ive heard that the Harbach fan provides less actual cooling. A cleaned and lubed original fan, correct placement of the blade and the little top plate in place should be all that is required. Replaci; /archives//html/Amps/2011-12/msg00063.html (14,609 bytes)
3. Re: [Amps] SB-220 filament pin cooling was: Re: Replacing 3-500Z tubes with 4-400A tubes (score: 1): Author: Pete Smith <n4zr@contesting.com>; Date: Wed, 07 Dec 2011 15:04:39 -0500; The melting was occurring inside the pins, not in the wiring of the socket. I used good high-temperature silver solder to do the resoldering. Interesting point about the Harbach fan - it certainly ma; /archives//html/Amps/2011-12/msg00066.html (16,060 bytes)

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