You can make a good choke using the "biggest clamp-on" (a snap-on #31 ferrite) with 8 turns of smaller diameter coax (i use Teflon high power rg-404 piece about 4 feet long). details and more info at http://www.audiosystemsgroup.com/RFI-Ham.pdf
Mouser carries the "biggest clamp-on": http://www.mouser.com/ProductDetail/Fair-Rite/0431177081/?qs=KmHvPbTOE4RJzgtUylmsjQ%3d%3d K3JT _______________________________________________ UR RST IS ... ... ..9 QSB QSB - hw? BK
