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1. [Amps] SB-220 Exciter Foldback (score: 1): Author: "pmihnovets" <pmihnovets@comporium.net>; Date: Mon, 27 Oct 2008 18:12:58 -0400; I recently have been re-furbishing a SB-220. It has the Harbach rectifier board mod and also the Somis parasitic mod. Grids are grounded directly to chasis with copper. The problem I have been experi; /archives//html/Amps/2008-11/msg00001.html (7,444 bytes)
2. Re: [Amps] SB-220 Exciter Foldback (score: 1): Author: "Carl" <km1h@jeremy.mv.com>; Date: Sat, 1 Nov 2008 12:21:57 -0400; Grounding the grids decreases the excellent IMD of the Heath design and increases the possibility of instability not addressed by Measures' voodo science. The Alinco is very sensitive to VSWR. I woul; /archives//html/Amps/2008-11/msg00005.html (8,946 bytes)

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