How can I block AM from a wire?

Question

I have an "Invisible Fence" system for my dog, because of the unusual layout of my yard I need to block the AM signal coming from the wire for a stretch.

Is there some type of DIY shielding I can make to block the signal coming from the wire?

Answer 1

This doesn't make a great deal of sense. If you want no signal, why not just switch the drive off?

You can shield wire by putting a screen around it and earthing the screen although the more normal arrangement is to use shielded wire (or even co-axial cable). But it's effectiveness varies. If the shield gets excited (no, I am not joking) it will radiate which might lessen the impact of the exercise.

Answer 2

Just use a piece of well grounded coax in that stretch instead of wire. The RG6 you get at Radio Shack or Home Depot will work.

Answer 3

RG56 Coaxial just uses grounded aluminum sheilding outside the dielectric and copper.  You can do the same with some wire mesh wrapped around 2 2x4's with a space inbetween for the dogwire to traverse through. Then, bury the 2x4's. Voila