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1. [Amps] New Design Question (score: 1): Author: TexasRF@aol.com; Date: Wed, 20 Oct 2010 10:58:11 EDT; Before I run off to invent a new square wheel, here is a question for the group: I want to tune up a new cathode input circuit for a 222 MHz amplifier using a GS23B tetrode (I have some already). I a; /archives//html/Amps/2010-10/msg00329.html (7,400 bytes)
2. Re: [Amps] New Design Question (score: 1): Author: "Bill, W6WRT" <dezrat1242@yahoo.com>; Date: Wed, 20 Oct 2010 09:07:05 -0700; ORIGINAL MESSAGE: REPLY: I don't think you would be successful with only grid current flowing. In a grounded grid circuit, a large part of the input impedance is created by "modulating" the cathode c; /archives//html/Amps/2010-10/msg00332.html (7,779 bytes)
3. Re: [Amps] New Design Question (score: 1): Author: TexasRF@aol.com; Date: Wed, 20 Oct 2010 13:09:07 EDT; Bill, I was thinking the nominal 50 ohm value was derived from the time varying elements of the cathode voltage and current over the drive cycle. It occurred to me that I can easily test this idea on; /archives//html/Amps/2010-10/msg00334.html (8,358 bytes)

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