Original poster: "Steve Greenfield by way of Terry Fritz <twftesla-at-qwest-dot-net>" <alienrelics-at-yahoo-dot-com> > Original poster: Finn Hammer > http://home5.inet.tele.dk/f-hammer/tesla/tesla.htm Very nice! Check out Finn's site, the primary and the rotary spark gap are continuously variable and appear to be adjustable while operating. Love the control panel, too. Steve Greenfield