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1. [Amps] Failure: SB-220 bias supply (Harbach board) (score: 1): Author: "Bill VanAlstyne W5WVO" <w5wvo@cybermesa.net>; Date: Wed, 13 Jan 2010 11:13:35 -0700; This morning I turned on my converted SB-220 6-meter amp and discovered it was not amplifying any more. A little checking with a voltmeter revealed that there was no operating bias being generated by; /archives//html/Amps/2010-01/msg00148.html (7,832 bytes)
2. Re: [Amps] Failure: SB-220 bias supply (Harbach board) (score: 1): Author: "Carl" <km1h@jeremy.mv.com>; Date: Wed, 13 Jan 2010 17:00:40 -0500; Undersized diodes IMO Bill. I only use 1N5408's when replacing that zener as they are impervious to something like a little arc. Carl KM1H _______________________________________________ Amps mailing; /archives//html/Amps/2010-01/msg00158.html (9,028 bytes)

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