Simple High voltage generator

This simple circuit creates up to 300 volts depending on the imput voltage and the inductor inductance. I didnt put a fixed inductance because I wanted to make the output voltage variable. R3 is a variable resistor and you can use it to also chance the output voltage without changing the inductance. The D2 doesn't allow more than 300v to the output because its a 300v TVS. I have put in jumpers to make the board's use even more flexable.