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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 mijostyn

mijostyn's avatar
mijostyn
8,570 posts
 
As for RFI, keep all your cables as short as possible and use shielded power cords. They should be three conductor plus shield. The shield should be connected to the male end only. The best way to make sure thi is the case is to make your own which you can easily do at the state of the art. You can even make them look sharp if you care. I don't. Use balanced cables everywhere you can.
If you still have trouble then you will need to move.
mijostyn's avatar
mijostyn
8,570 posts
 
If I understand this correctly the hum still exists with the mains breaker is off = no power at all to the house. What we have here is a case of tinnitus.
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