This is not exactly engineering. Please move where appropriate if it's not. I am testing some 4G netcomm wireless routers to see how much traffic they can handle in certain situations. We are trying to find ways to "impede" them. They have two antennae that can be unscrewed. Removing both pretty much messes them up completely - good to know. Removing one slows things down a bit, but doesn't grind it to a halt. The best someone came up with at work to test was: In our meeting I said that I believed this was the old "tin foil hat" thinking. The foil makes it EASIER for the aliens/government to track your thoughts, right? Anyway, in this case, is the can impeding or boosting? What would be a good way to impede the signal? -Dave K p.s. this is becoming a fun place to work. Let's hope I get hired full time.