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1. [Amps] AB1 input circuits (score: 1): Author: Vic K2VCO <k2vco.vic@gmail.com>; Date: Mon, 25 Mar 2013 12:21:13 -0700; I'm proceeding with my AB1 4CX1000A amplifier. I've taken the advice of several reflector participants and used a pi-section lowpass filter design for the input circuit. It is very simple: a 120 pf t; /archives//html/Amps/2013-03/msg00329.html (7,919 bytes)
2. Re: [Amps] AB1 input circuits (score: 1): Author: Mike Tubby <mike@tubby.org>; Date: Tue, 26 Mar 2013 07:24:03 +0000; Personally, I'd put the higher HT on the '1000 - you'll get a bit more power out with a bit less anode current and you'll less likely dip in to screen current on he negative-going half of the RF cycl; /archives//html/Amps/2013-03/msg00334.html (8,249 bytes)
3. Re: [Amps] AB1 input circuits (score: 1): Author: "Leigh Turner" <invertech@frontierisp.net.au>; Date: Tue, 26 Mar 2013 20:25:13 +1030; Yes, I concur with Mike's advice about the higher plate voltage on the 4CX1000A; I'd suggest circa 3000 V under load or about 3200 V under zero-signal conditions. That operating loadline will work ni; /archives//html/Amps/2013-03/msg00335.html (9,463 bytes)

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