General › G4 Amateur Radio Practices › G4C08
G4C08
Which of the following would reduce RF interference caused by common-mode current on an audio cable?
Pick an answer to check it.
Answer: A. Place a ferrite choke on the cable
A ferrite choke on a cable adds impedance to common-mode current flowing on the outside of the cable. That blocks the RF without affecting the audio signal inside.
Tip: Ferrite chokes common-mode RF.