ARRL RFI Book 2nd Edition
There are two kinds of hams: Those who don’t have interference problems and those who get on the air!

ARRL’s team of experts have compiled the best advice available on every type of radio frequency interference (RFI), from automotive to television, from computers to DVD players, from audio equipment to telephones. This second edition also includes resources for tackling power line noise, cable television interference, and RFI solutions for other electrical devices. If it’s a device that can be affected by interference, including your radio receiver, you’ll find practical cures in this book.