On Fri, 2007-03-30 at 11:24 +0100, Richard Bown wrote: > Hi all > Am I correct in my assumption that a piece of waveguide with a magnet > wrapped around it so the gap > is across the wave guide is an isolator ? > > TIA 73 Richard > If there's some ferrite inside. Needs that ferrite, magnetic field in air does nothing. 73, Jerry, K0CQ