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1. [Amps] 813 cathode zener bias (score: 1): Author: "Steve Flood" <kk7uv@bresnan.net>; Date: Mon, 25 May 2009 05:09:43 -0600; I am considering building the adjustable zener bias circuit as used in the GM3SEK triode board to try in my 3x813 grounded grid amp project. The GM3SEK documentation says the cicuit is good for 3 to; /archives//html/Amps/2009-05/msg00186.html (6,908 bytes)
2. Re: [Amps] 813 cathode zener bias (score: 1): Author: "Bill, W6WRT" <dezrat1242@yahoo.com>; Date: Mon, 25 May 2009 10:37:37 -0700; ORIGINAL MESSAGE: REPLY: When reading the characteristic curves chart, it doesn't matter whether the tube is operated in GG or 'normal'. Just select the plate voltage and the desired idling current a; /archives//html/Amps/2009-05/msg00189.html (7,547 bytes)

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