AcidFlashGordon
TGT Addict
As I understand it, essentially, a faraday cage is a foil lined box that may have something like chicken wire also around lining it (but I can't remember what that layer is designed to prevent). The main thing with lining it with foil is all edges need to be covered (cracks around your door for example).
Yes, I was talking about leaving your onstar device in the vehicle. I had a chevy cobalt with an onstar system in it that didn't have a separate antenna. While GPS antennas do help the gps get a more accurate signal, I think they can still operate without them. At least the little bit of reading I just did about them was pointing me in that direction.
An inexpensive way to construct a Faraday cage is to take some copper screen, make a box or enclosure around the device you want to shield, making sure to seal all edges with solder or weld and then ground it. That's basically what we did at a former job when we needed an R.F. cage to test certain modules that needed to be shielded from outside R.F. interference AND to prevent the module from affecting surrounding electronics. The "cage" worked very well because as long as the door was open, we could listen to our FM radio. Once the door was closed, no radio.
Finding a ground is relatively easy without having to drive a copper rod 4' to 6' or more into the earth. Your metal cold water pipes will work as a ground. A good substitute is the electrical ground at your circuit breaker box.