Tenatra: Devmapall: I've thought about building one just for movies in a theater. I have not researched this at all so what are the chances I'd be caught using one?

It is highly unlikely that anyone around you is going to know that it is you that is creating the dead spot unless one of your buddies that is in on it decides to out you. The FCC created a Jammer Tip Line to have a place to report sellers or users of jamming devices. If you end up doing it then do not purchase it from a company, the FCC started going after sellers last month and they have to give the information of people that purchased devices from them since jammers are contraband.

Jammers are a horrible thing. As someone who is on-call on the weekends, if I don't get a message/call to come in then someone could die or become disabled for life.

/don't jam, call assholes out, or report them to the theatre.

Frisbee shaped. Very fine copper wires, say an inch square, in a band around the nearly outer rim. the very outer rim is a ceramic band (non emp blocking) with an inch of c4, or a higher velocity explosive if you can find one. The interior is filled with aerogel capacitor material. The aerogel supercaps are amazing, if you havent played with one, a cubic centimeter has a capacity of one farad. Thats right, not any kind of MICRO farad. One cc, ONE FARAD. That is a lot of juice. Timer, set, pull the pin, fling the frisbee, on a timer the aerogel dumps the juice into the fine wires, a small explosive dumps the aerogel out of the disk, the c4 goes off, and the fine wires, running high amperage high voltage are already about to melt from the juice, find themselves going from a ring a foot across to an inch across.

Did the math once, for about 100 feet the emp is equivalent to being 10 miles from a nuke going off. Construction costs, really not that much more than a claymore mine, since mass producing that much of the aerogel would likely drive it's costs down.