Original poster: "J Whyte by way of Terry Fritz <twftesla-at-qwest-dot-net>" <xoom321-at-hotmail-dot-com> OBIT's usually operate around 10,000 volts AC at 23 mA. I have seriesed 4 together to get 960 VA -at- 10,000 volts. 50" sparks are possiable with this TC setup.