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1. [Amps] home brew 811a amp - need some advice (score: 1): Author: "Ulf (SM0NOR)" <ulf@sm0nor.com>; Date: Sat, 17 Dec 2011 16:20:22 +0100; Hi all, I need some advice from you more experienced guys.... I've been building on my 811a amp for some months now and I'm reaching quickly the point of the "big" test. Every section of the amp has; /archives//html/Amps/2011-12/msg00133.html (8,898 bytes)
2. Re: [Amps] home brew 811a amp - need some advice (score: 1): Author: Vic K2VCO <k2vco.vic@gmail.com>; Date: Sun, 18 Dec 2011 08:18:23 -0800; My guess is that moisture in the transformer caused an insulation breakdown. I've seen recommendations here in the past for how to dry out a transformer before use. If it was stored in a damp locatio; /archives//html/Amps/2011-12/msg00138.html (10,771 bytes)
3. Re: [Amps] home brew 811a amp - need some advice (score: 1): Author: "Carl" <km1h@jeremy.mv.com>; Date: Sun, 18 Dec 2011 11:56:54 -0500; It sounds like the step start relay did not release and the resistor burnt. That occurs often in Ameritron amps but should not be necessary for 811's. Carl KM1H ______________________________________; /archives//html/Amps/2011-12/msg00140.html (11,002 bytes)
4. Re: [Amps] home brew 811a amp - need some advice (score: 1): Author: "Ulf (SM0NOR)" <ulf@sm0nor.com>; Date: Sun, 18 Dec 2011 20:32:44 +0100; Yes, I guess I could do without the step start. I may try without it when I get a new transformer. I just need to find a way of protecting it better. I would probably put in a fast acting circuit bre; /archives//html/Amps/2011-12/msg00143.html (11,753 bytes)
5. Re: [Amps] home brew 811a amp - need some advice (score: 1): Author: Thomas Carlsson <thomascarl@gmail.com>; Date: Tue, 20 Dec 2011 06:51:39 -0200; Hej, Några av kommentarerna följer mina tankar, Fukt i trafon som orsakat kortis mellan primär o sekundär, i så fall ny Trafo Det är inte röret som behöver step start utan det är mest för att skydda; /archives//html/Amps/2011-12/msg00153.html (13,192 bytes)
6. Re: [Amps] home brew 811a amp - need some advice (score: 1): Author: "Carl" <km1h@jeremy.mv.com>; Date: Tue, 20 Dec 2011 10:45:16 -0500; It would have to have been in a Scandanavian sauna for a few years since that transformer is pretty well sealed in heavy transformer varnish. Carl KM1H _______________________________________________; /archives//html/Amps/2011-12/msg00157.html (12,569 bytes)

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