A Ham’s Guide to RFI, Ferrites, Baluns, and Audio Interfacing by K9YC

I think it was a broken link on the first email notice. This should take you to the full article

Here is a link to an article, “A Ham’s guide to RFI, Ferrites, Baluns and Audio interfacing. This is a well written, by an expert, about RFI, Baluns and Audio Interfacing. It is in down to earth terms where you DO NOT have to be an EE to understand. Jim also writes articles for the ARRL. Definitely worth the read. http://k9yc.com/RFI-Ham.pdf