My big tesla coil ("The Phoenix") running at Nottingham 2016. Power is around 7 to 8kW from a pole distribution transformer using an external ballast. <br />Toroid is 50 x 11 inch. Rotary is a Synchronous rotary (SRSG) with the phase control taken care of by a John Fraeu type controller. Disc is 11 inch and uses 0.25 and 0.375 inch diameter Tungsten electrodes, spaced at 10 thou clearance. The bps rate is 200 bps from 4 flying electrodes on the disc running at 3000rpm. <br />Max spark achieved in suitable location conditions is in excess of 10 feet. <br />This particular location is limited because of low ceiling height, as can be seen. <br />Several times in the video I deliberately set the phase wrong, and also run it lower at power, to encourage ground strikes. These periods are easily detected by the difference in the tone of the coil. <br />More details about the coil and equipment used at www.hvtesla.com
