Original poster: "tmoore by way of Terry Fritz <twftesla-at-qwest-dot-net>" <tmoore-at-erie-dot-net> Hello evryone I was just woundering if some one knows the exzact spacing between spark gap electrods for 7.5KV Perhaps some one has a data sheet on various voltages on breakdown distances, or maybe a formula? Thanks a bunch! Sincerely, Nolan Moore