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1. [Amps] RF coupling to 8877 filaments? (score: 1): Author: "Mike McCarthy, W1NR" <lists@w1nr.net>; Date: Mon, 12 Mar 2012 13:33:47 -0400; I am in the process of building an 8877 amp and through the course of comparing various designs I came across one in Orr's Handbook where the input RF was coupled to the filaments with .01 capacitors; /archives//html/Amps/2012-03/msg00145.html (6,759 bytes)
2. Re: [Amps] RF coupling to 8877 filaments? (score: 1): Author: "Han Higasa" <higasa@plum.ocn.ne.jp>; Date: Tue, 13 Mar 2012 08:45:38 +0900; hi Mike and all The goal of the filament choke is to prevent a feedthrough - leakage - from the cathode to the filament transformer, and the break down between cathode and filaments, if filaments hav; /archives//html/Amps/2012-03/msg00146.html (7,565 bytes)
3. Re: [Amps] RF coupling to 8877 filaments? (score: 1): Author: Ron Youvan <ka4inm@gmail.com>; Date: Tue, 13 Mar 2012 22:26:04 -0400; I think filament chokes are used with cathode driven amplifiers only. I have never heard of using them with grid driven amplifiers. The only alternate that I have ever heard of is threading one condu; /archives//html/Amps/2012-03/msg00163.html (8,251 bytes)

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