Maybe I'm wrong, but I thought it took more than 1million volts to get 31ft arcs, and I'm sure it takes more than 500,000... Or else we'd all have 31ft arcs. ?? --Rick-- > Longest sparks were 31 feet or so, highest voltage was maybe 1/2 to > 1 million volts or so at the very most, I would think. > Cheers, > John Freau