Dear Alex, You have summed it up quite well. I had lost sight of the term "choke balun" - all I could think of was coax balun and the W2DU balun. Tnx for reminding me of the correct terminology, "choke" balun. 73 de W9DMK - Bob Lay, Dahlgren, VA http://www.qsl.net/w9dmk w9dmk at crosslink.net