On Fri, 5 Dec 1997, Michael Wilson wrote: > mission-critical IS systems. These threatened attacks were said to > include hacking, virus attacks, and use of radio-frequency weapons > capable of destroying computer systems with blasts of high energy. Hey, a friend built one of those, once. He made a beam antenna using elements out of an old thrift-store microwave oven. He found the plans for a beam antenna in some old electronics book. It worked, too --- but he dismantled it for being too dangerous. The original plan was to cut the length of the elements just a tiny bit so the microwaves don't spin water and it's dangerous only to computers and not brains and bodies. Then we were going to fabricate a turret on the top of his Honda Civic and mount it up there -- until his car exploded in the high school parking lot and he had to tear it up with his Saws-All. Anyway, if you've got electronics know-how and about $40 they're fairly simple to make, and theoretically work from a comfortable range. Transmitting, a beam antenna concentrates about 85 to 90% of the energy in a particular direction. If total anarchy breaks loose, I guess you could just omit the part about shortening the transmission elements -- but fashion some sort of operator shield. Mark
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