The 10" Powersupply is made from 6 Microwave-Oven-Transformators. These transformers are very strong and can handle up to 2KW per unit. They are not isolated for switching them in series, so I had to put them into an oil bath. The whole unit has 13KV output voltage.
This is a spark from the 6 MOT supply running with big ballast at ~4000VA.
This are the two ballast MOTs switched serial to the primaries of the MOT supply to limit current. The littler one limits the 13KV supply to 8A, the big one to 16A (the shunts of the big MOT are removed).
For the 10"coil both ballasts are used for 13KV@350mA at 4500VA. It would be possible to use a smaller inductive ballast to get up to 10000VA, but where to get the power from?
This is one unit rated 4,3KV@700mA. Thes boxes can be set in series for 8,6KV or 13KV.
I built 3 identical frames for the powersupply to carry it around. The box is completely closed, so no oil can run out when carrying around.