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There is a thing called a Farraday Cage that I have heard rumors about. I have heard that some have had success building a chicken wire cage that is grounded directly to earth, but it seems that it is only good on RF, and that it won't impact ELF (60 hz). Any experience with the cage?[/QUOTE]
There is stuff on line about Faraday cages. A company I work for is into RFID tagging, and their stuff works on 433 MHZ (heavy TV and FM area). SOmetimes they have a problem that the reader can "see" through the ceiling to read tags on the floors above it. The answer to that is a Faraday cage. It's called a cage, which implies a sealed metal box, and indeed it can be a wholly-enclosing box.
But it can also just be a sheet of metal bent around the top of the reader, between it and the floor. And, it can be a fine mesh. It doesn't have to be heavy steel sheet I think (but my physics isn't great), that it depends on the frequency of the interference whether you need sheet or mesh.
And it has to be steel mesh tho
It's why you are safe in a car hit by lightning...the charge goes around the skin of the metal as it acts like a Faraday cage.
Phil
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