On Tue, 2 Dec 2008 15:51:06 -0800 (PST), rick darwicki wrote: >My question is what core material should I use to install the big >binocular type chokes on the coax and how do you wind them? There >must be a link to the info, but I can't find it. http://audiosystemsgroup.com/RFI-Ham.pdf 73, Jim K9YC