60hz hum in wireless headphones

[Hi Ho]

I have a rather complicated setup involving my wireless headphones. I use them with my PC for late night gaming and with my receiver for TV and music. The thing is, my PC is about twenty feet away from my receiver.

I have two RG-6 cables running under the house that connect my PC to the receiver. I have a series of three switches that allows me to either send video/digital audio from the PC to the receiver, or send analog audio from the receiver to the headphone transmitter, which is located at my PC. This all works well except for one thing. When listening from my receiver, there is a 60hz hum that is very loud if I turn the volume up past very quiet. This is extremely annoying and I cannot enjoy late night TV or movies with this constant buzzing. Is there any way to eliminate this buzz?

A very crude drawing is attatched.

 

[mtrycrafts]

I have a rather complicated setup involving my wireless headphones. I use them with my PC for late night gaming and with my receiver for TV and music. The thing is, my PC is about twenty feet away from my receiver.

I have two RG-6 cables running under the house that connect my PC to the receiver. I have a series of three switches that allows me to either send video/digital audio from the PC to the receiver, or send analog audio from the receiver to the headphone transmitter, which is located at my PC. This all works well except for one thing. When listening from my receiver, there is a 60hz hum that is very loud if I turn the volume up past very quiet. This is extremely annoying and I cannot enjoy late night TV or movies with this constant buzzing. Is there any way to eliminate this buzz?
.

There has to be a way, of course. You are getting some ground loop issues but right now I just don't see where it might be entering: your switcher for video and digital audio. Why not experiment. See if you still have the hum with the video disconnected, just digital audio
Or, disconnect everything but the hookup to the audio all by itself and see if it hums. You may need to temporarily try a cheater plug to lift ground to see if that is the cause, or, your wiring someplace, the way you have it hooked and switched?
Need to experiment for now.