EMP weapon project II
Introduction
This EMP device is very similar to the first project, but it produce high voltage using a ignition coil; infact the step-up circuitry is the simple ignition coil driver presented in this site. All the components needed are quite cheap and easy to find (if you can't find the 4093 you can use any Shmidt triggered quad nand IC).
Theory
There's not much to say about this device, it is composed by a variable duty-cycle (R4) and frequency (R3) oscillator that drives the ignition coil trought the mosfet. Is very important trim the duty-cycle to obtain a high voltage ouput of about 3000-3500 V, higher voltage will destroy all marx capacitors. The high voltage produced charges the marx generator connected to the magnetron. The resistor R6 is very important (it will get hot quickly), because it protects the capacitors from overload in case of non-firing of the spark-gaps.
Safety Hints
Microwave radiation is very dangerous
Don't touch any part of the circuit while the device is operating
Pay attention to the caps, they may be charghed to high voltage
Don't stand in front of the magnetron while the circuit is on because you may be radiated
Don't use this circuit near any electronic device