G4NSJ - Common Mode Chokes used with coax and HF antenna aerials

Common mode chokes are very easy to construct and they are extremely useful when using coax fed HF dipole antennas. They help to block RF from traveling back down the outside of the coax. See the article below by Steve Hunt... https://gm3sek.files.wordpress.com/20... https://www.radio-workshop.co.uk/g4ns...