Quote:
Originally Posted by G6Tanuki
I'm thinking that this could be a form of "Modulation Hum".
|
Yes I have experienced that. Looking for sources of hum and using batteries to supply the modulator didn't remove the hum. Researching on the web, I came across modulation hum and it seemed a very good explanation. All the wiring in a house is carrying a high amplitude 50Hz ac waveform. It also acts as an aerial, receiving and re-radiating other transmissions. These get modulated with the mains frequency.
Of course, you shouldn't really be radiating anything with your modulator. Keep it all screened and you won't have a problem.