Original poster: "James B by way of Terry Fritz <twftesla-at-qwest-dot-net>" <zebulan123-at-yahoo-dot-com> Thanks for all the help with the making of my sstc. I am very plzed. it preforms well and ill have pics soon:)) I have been wondering how small of a coil might be built and still have spark output? and what kind of control circuit should i use as freq go past 600khz James