[eric_bullington]

Can you clarify what you mean here? Are you saying that certification would be required to build this device in the U.S. (not sell or market it)?

If so, this is incorrect. There is no FCC certification required for low-powered, non-licensed devices like this one if you don't sell or market them. You can run up to 5 such devices without any certication. See page 3 on:

http://transition.fcc.gov/Bureaus/Engineering_Technology/Doc...

[mschuster91]

I'm living in Europe, here you are liable for any RF device you use - and even in the license free bands, if you operate a self built jammer (or accidentally build a jammer instead of a working device) you're liable.