On Mon, 30 Nov 2009 21:15:57 -0500, Mike wrote: >Recently I read an interesting article about using toroid chokes to >reduce noise. Yeah, I probably wrote it. :) http://audiosystemsgroup.com/RFI-Ham.pdf W1HIS wrote something 4-5 years ago, but I don't have a link to it. 73, Jim K9YC