Here's a URL about HV, High-current power-supplies developed for 50-300kHz range up to 200 A at 50kV. Kinda interesting. ;) http://www-dsed.llnl.gov/documents/pulser_tech/rcpctta93.html#Ref1 I wish I had the expertise to follow all this, but it sure sounds promising. Dan <ntesla1-at-vm.sc.edu>