hey i found it:
To make an EMP blast on the Megawatt Range. That will basicly shut down a city. What fun.
You take a copper hollow tube, and fill it with some kind of fast but even burning explosive.
TNT whould work, as it is a very consistant material. Then you wrap an insulator around the tube.
Then you would wind approx 10 gauge wire around that in arcs about 1" apart.
Connect the ends to a capacator set capable of releasing about 100f ( farads ) You would want to energize
the coil about 200ns before you detonate the explosive. This will create a kind of rolling short
circit between the copper tube and the energized coil. ( the coil will crate a Magnetic field in the coper tubing )
The Short circut will build on itself untill you run out of copper tube, and the magnetic field
will pe "pushed" along the tube, with an EMP as the result. Frankly, It will probably kill every
computer within 20 miles, with only a small explosion. Do not do this, as it will be very bad for
all man kind. If you do decide to try it, make sure to stand over it, so we can get rid of you
As for making a small scale one to kill a specific target, ( too mess with your friends ) ya pretty much got me