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G4C04
What sound is heard from an audio device experiencing RF interference from a CW transmitter?
Pick an answer to check it.
Answer: A. On-and-off humming or clicking
A CW transmitter switches on and off as it sends code, so an affected audio device produces on-and-off humming or clicking. The tones follow the keying.
Tip: CW RFI clicks on and off.