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1. [Amps] 3-500Z amp producing output with no input, why? (score: 1): Author: Bill Dzurilla <billdz.geo@yahoo.com>; Date: Wed, 16 Jun 2010 07:54:48 -0700 (PDT); Hello, My homebrew 6 meter 3-500Z amp has made the trip to Europe. The only visible damage was that one of the lines to the filament pin of the 3-500Z had broken off. I soldered it back on. The amp p; /archives//html/Amps/2010-06/msg00171.html (7,425 bytes)
2. Re: [Amps] 3-500Z amp producing output with no input, why? (score: 1): Author: Vic K2VCO <vic@rakefet.com>; Date: Wed, 16 Jun 2010 08:11:33 -0700; It's become an oscillator! The high swr is an indication that it is oscillating on a frequency removed from the resonant frequency of the antenna. How to fix it could be complicated. You need to dete; /archives//html/Amps/2010-06/msg00172.html (8,988 bytes)
3. Re: [Amps] 3-500Z amp producing output with no input, why? (score: 1): Author: mikea <mikea@mikea.ath.cx>; Date: Wed, 16 Jun 2010 10:12:58 -0500; Sounds like something has gone seriously wrong with the neutralization, OM, and it's going into oscillation when keyed. The high SWR tells us that it's not oscillating in the 6m band, either. It may; /archives//html/Amps/2010-06/msg00173.html (8,526 bytes)

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