Thanks, Gary, for explaining that so eloquently. I think yours is the most understandable reply. It should make sense to all AMPS listers. 73 John K5PRO > Message: 4 > Date: Sun, 30 Aug 2009 21:11:54 -0500 > From: "Gary Schafer" <garyschafer at comcast.net> > Subject: Re: [Amps] SB-220 bias question ---- > 73 > Gary K4FMX