Original poster: "by way of Terry Fritz <twftesla-at-qwest-dot-net>" <Cydesho-at-aol-dot-com> My coil is running off of a 15kV NST, so it seems that a stacked poly cap made of the 1/16" HDPE wouldn't be able to withstand the voltage. Would the 1/8" thick sheets work? What is the dielectric strength per mil? Justin