Links to interesting publications. Non Resonant Long Wire with 9/1 UNUN Common-Mode Chokes by W1HIS RFI and HAM Radio by K9YC The Benchmark Beverage by W8WWW Low Band Receive Antennas by W8JI Windom, OCF antenna with 4/1 BALUN by W8JI Ferrite Chokes and Baluns by GM3SEK A Ham’s Guide to RFI, Ferrites, BALUNs, … by K9YC A wealth of information about antenna designs, online calculators and specific tools for HAM operators by ON4AA.