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1. [Amps] Initial capacitor settings 8877 (score: 1): Author: "Drax Felton" <draxfelton@gmail.com>; Date: Mon, 18 Feb 2013 23:52:40 -0500; I'm building an 8877 amp for 6 meters. What rough values should the input and output capacitors be set to as an initial starting points? The tables in the Radio Handbook stop at 10 meters. I want to; /archives//html/Amps/2013-02/msg00138.html (8,086 bytes)
2. Re: [Amps] Initial capacitor settings 8877 (score: 1): Author: Mike Tubby <mike@tubby.org>; Date: Tue, 19 Feb 2013 23:36:49 +0000; Hi, Firstly I suggest that you look at the G3WOS and GJ4ICD amplifier designs both use a 8877 on 6m - these will get you in the right ball park for anode tune (30pF vacuum variable), the main inducto; /archives//html/Amps/2013-02/msg00149.html (9,515 bytes)
3. Re: [Amps] Initial capacitor settings 8877 (score: 1): Author: Mike Tubby <mike@tubby.org>; Date: Tue, 19 Feb 2013 23:55:40 +0000; ... forgot to say ... having removed the tube you are testing the output tank in the RF deck "cold" - no supplies (no HT, no bias, no supplies) _______________________________________________ Amps ma; /archives//html/Amps/2013-02/msg00150.html (10,937 bytes)
4. Re: [Amps] Initial capacitor settings 8877 (score: 1): Author: Bill Turner <dezrat1242@yahoo.com>; Date: Wed, 20 Feb 2013 00:02:01 -0800; REPLY: The values can be scaled up or down linearly. Just multiply or divide as necessary. Don't forget to include the tube's output capacitance in the final tune cap value. Bill, W6WRT _____________; /archives//html/Amps/2013-02/msg00170.html (8,854 bytes)
5. Re: [Amps] Initial capacitor settings 8877 (score: 1): Author: "Chris Gare" <chris@gare.co.uk>; Date: Thu, 21 Feb 2013 10:53:34 -0500; Mike has it right. Just set the caps to centre and tune for max. Start with low drive and gradually increase drive and you should be OK. Never had any issues with several 8877 amps I've built. Chris; /archives//html/Amps/2013-02/msg00172.html (10,842 bytes)

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