In a message dated 10/17/99 9:22:55 AM Central Daylight Time, tesla-at-pupman-dot-com writes: << I'm hoping the level-shifted power supply will add a new dimension of efficiency to the project and help to achieve never-before-seen levels of VTTC performance. >> John, I assume this is your 833C coil. Please 'splain what a level-shifted power supply is and how it is used. Cheers, Ralph Zekelman