Extremely small, simple and powerful EMP box. I was lucky to have bought a very good power supply that already on it's own generates EMP, as long as there is a spark gap connected to the output.
Use 4xAAA or 4xAA batteries in series. (Tested non stop for 15 minues)
Intially tested using a 6VDC 450mA power supply with perf board 3 hole spark gap, and functioned for 2 hours non stop. DO NOT USE 3 HOLE SPARK GAP WITH BATTERIES! THE HV MODULE WILL BURN OUT!
Intial 3 hole spark gap for 6VDC @ 450mA power supply. (Tested for 2 hours, non stop.) [DO NOT RUN OFF OF BATTERIES!!!, IT WILL BURN OUT]
Final 8 hole spark gap for 6VDC 4xAA, 4xAAA. (Tested for 15 minutes, non stop.)
Decrease spark gap for higher pulse repetition. (Solder holes together on perf board)
Final result (with SMA connector):
Main component, HV MODULE:
HF warning decal to put on modules.:
I was able to disrupt this calculator at a distance of about 3.5 inches.
3D printable chassis: