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1. [Amps] SB-221 parasitic supression upgrade kit (score: 1): Author: ka3qlf@comcast.net; Date: Thu, 20 Nov 2008 17:51:27 +0000; Hello, and thanks for reading this message. I have been troubleshooting an arcing issue with my SB-221. this occurs on all bands, both SSB and CW, and is intermittent. My best idea is parasitic oscil; /archives//html/Amps/2008-11/msg00198.html (6,819 bytes)
2. Re: [Amps] SB-221 parasitic supression upgrade kit (score: 1): Author: Rick Stealey <rstealey@hotmail.com>; Date: Thu, 20 Nov 2008 19:05:05 +0000; If your amp used to be stable why do you think it would suddenly start arcing, or go into parasitic osc.? It IS possible the resistors in the parasitic chokes changed value, and that should be easy t; /archives//html/Amps/2008-11/msg00199.html (7,850 bytes)
3. Re: [Amps] SB-221 parasitic supression upgrade kit (score: 1): Author: Vic K2VCO <vic@rakefet.com>; Date: Thu, 20 Nov 2008 13:50:58 -0800; I would agree with all of the above and add that the arc could be occurring in the tube, if it is gassy. Parasitic oscillations rarely (if ever?) cause arcs anyway, so this is probably the least like; /archives//html/Amps/2008-11/msg00201.html (8,703 bytes)
4. Re: [Amps] SB-221 parasitic supression upgrade kit (score: 1): Author: "Carl" <km1h@jeremy.mv.com>; Date: Thu, 20 Nov 2008 17:43:54 -0500; Dirt, especially in already arced cap plates dont get better with use. Enough times and it takes out switch contacts. Find a 10-12pf 1KV silver mica or a 2-5kV ceramic doorknob and wire it directly a; /archives//html/Amps/2008-11/msg00204.html (10,014 bytes)

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