G0UUT has already mentioned the W1HIS document, however before everyone rushes out to buy ferrite a look at the following might be worthwhile.
A Ham's Guide to RFI, Ferrites, Baluns, and Audio Interfacing http://www.audiosystemsgroup.com/RFI-Ham.pdf Common-mode chokes http://www.karinya.net/g3txq/chokes/ 73 to all Trevor G0KTN _______________________________________________ FlexRadio Systems Mailing List FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ Knowledge Base: http://kc.flex-radio.com/ Homepage: http://www.flex-radio.com/
