Which electronics emit RF frequencies? Specifically, do tape recorders?

Do audio recorders emit RF frequencies?  I know that many will find this question beneath them, but I thought I'd give it a shot. I am trying to purchase AUDIO detecting equipment specifically for tape recorders. Please, help an Elec-Idiot out. Thanks. 

orksecurity7 years ago
Seconding Re-design: Which RF frequencies are you interested in/worried about, at what levels? What are you trying to accomplish -- I'm not sure what you mean by "audio detecting equipment" in this context.
Re-design7 years ago
Almost ALL electronics emit some kine of RF frequencies. Any time there is a oscillator, motor, very fast switch like in dimmer switches and switching computer supplies there is some RF generated.

Whether or not it's the RF you're trying to find is another question.

Am radios are particularly disturbed by stray RF.