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how to eliminate air-born RF

any ideas on how to eliminate airborn RF. I have disconnected all equipment from themselves and the ac outlet. Even shut off the main circuit breaker in the service panel. Have disconnected all video cabling and antenna wires. after all this, when I place my head behind my rack, which just holds my amps, I can here a humming noise similar to the ground like hum you hear from an electric guitar/amp combo or similar to a bad tonearm phono ground loop. With system wired up and operational, this humming is easily heard at idle on, with gain on preamp down. Again, this is occuring with nothing physical wired together or to the ac outlets and with all ac power shut off in the house. PLEASE HELP!!!
mooncrikit

Showing 2 responses by sean

sean
6,231 posts
 
Help me to understand something here. You have everything disconnected from component to component and no AC applied to any component and you still have a hum coming from behind your component rack ? Sean
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sean
6,231 posts
 
I corresponded with Mooncrikit briefly and from what i can gather, Edisilva seems to be on the right track. It is almost as if there is an external source for the vibration / hum. Only problem is, Mooncrikit has experienced this when the AC mains were disabled, meaning that the power to the entire house was not functional. As such, it looks like Philip's suggestion about an EM field could be coming into play here. I have experienced this problem to what most would consider a "scary" and very visible extent before, but not inside of a house.

As to try and narrow things down, how far is your house from a large pole transformer ? Do you have High Voltage power lines in close proximity to your house ? Is the AC feed into your house in very close proximity to this room ?

To be quite honest, this sounds rather baffling to say the least. Sean
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