Or switch mode power supplies (SMP), they can be noisy evil things especially cheap wall wart ones. Also desktop power and lap top supplies.
Just go near them with a portable am radio tuned off station around 600khz, turn up the volume, make sure it doesn’t auto mute because it’s off station, and that’s via the air, imagine what they’re injecting into your house mains wiring.
Cheers George
Just go near them with a portable am radio tuned off station around 600khz, turn up the volume, make sure it doesn’t auto mute because it’s off station, and that’s via the air, imagine what they’re injecting into your house mains wiring.
Cheers George