At 04:19 PM 11/11/04 -0500, Tyler Durden wrote:

Anyone know from first-hand experience about cellphone jammers?

I need...

1) A nice little portable, and 2) A higher-powered one that can black out cell phone calls within, say, 50 to 100 feet of a moving vehicle.

Cell Jammers do a DoS on the frequency used by the base station to contact the handset, preventing a ring-in. Or a ring-out; the handset reports no service. After a ring-in the base tells the handset to jump to another freq, so you can't drop an ongoing conversation with a typical jammer. The < $200 jammers will stop folks in the next car, or in your office, but not too much farther; depends on the strength of the local base station. To jam the entire cell freq *bands* would take more power and more complex circuits. A jacob's ladder and/or tesla coil might work but would be indiscrete at least.