50kV rectifier test

[@MasterIvo]

fun! I have just done the same, but with lower voltages. I used a zvs with flyback transformator (china) which already is dc. I used Tungsten for the spark gap. and probed to see the DC sawtooth wave. although it's grounded, it is not DC which surprised me. Adding a microwave diode did not help. 72kc/s was pretty fast for a sparkgap