Hi Garry If you have a web site With details could you post your address. Luc Benard(Montreal) Tesla List wrote: > Original Poster: "Gary Johnson" <gjohnson@ksu.edu> > > Who holds the record for spark length to a grounded object from a solid > state driven Tesla coil? I hit 57 inches recently before a group of over 50 > people. I was direct driving an Extra coil at about 2 sparks per second with > an IGBT inverter. > > Gary Johnson