Extra class question #26

What is a common characteristic of interference caused by a touch controlled electrical device?
A The interfering signal sounds like AC hum on an AM receiver or a carrier modulated by 60 Hz hum on a SSB or CW receiver
B The interfering signal may drift slowly across the HF spectrum
C The interfering signal can be several kHz in width and usually repeats at regular intervals across a HF band
D All of these choices are correct

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