Original poster: dhmccauley-at-spacecatlighting-dot-com > that would make one heck of a marx generator using 10 21kv .5mfd caps. i > think i might build one. any one have any suggestions The problem here is that you will need a pretty serious charge supply, especially if you want fast discharge rates. Also, the capacitors still need to be able to withstand the high current discharges. Dan