Test with 150V at 220uF on a 400V capacitor, energy 2.475J piece of stranded copper wire.
~100V output without load... with load (capacitor) its ~11V
What is the max voltage and current ratings? I found that the MOSFETS I used needed to be switched at the gate with at least 10V. It says 5V in the data sheet but 5V wasn't 'completely' closing the 'switch'. SO when I used my 555 PWM circuit @ 5V to switch the MOSFET it got very hot very quickly.
I suspect the 5v spec you saw was called gate threshold voltage.
I also read in an app note that the frequency in these circuits ranges from 100KHz to 5MHz.
I used electrolytic capacitors, but with frequencys above 100kHz I think I should use ceramic ones.
Go back and read that again. I think you will find it said from 100Hz to 5KHz.