This SSTC was the first one that came to Hvguy Labs, and is based on a half-bridge circuit using two IRF840 MOSFET's and a TL494 (NTE1729) Driver IC. Aron first experimented with this coil for several months, getting the design right. After he finished the coil, Justin REALLY wanted to make one! And so here we are in the year 2002, with a couple of new H-bridges and arcs over 14" long.

The output of the TL494 driver IC is buffered by a couple of bipolar transistors, then fed into the primary of an isolation transformer. From there, the isolated outputs drive the two power MOSFET's, which then drive the primary of the Tesla Coil. The primary is 4.5" O.D. with around 15 turns of #14 wire. The secondary is 3.5" O.D. wound 10" with #32 magnet wire. Input power to the system is 120VAC 60Hz at 2.5A. The coil is extremely reliable and has been used to catch the eye of many trick-or-treater's on Halloween...