Here you see me with my first large coil. I had 10 12,000 volt 60 milliamp neon transformers connected in parallel on the secondary side. The primaries were, connected 5 in parallel to one side of the 250 volt line and the other 5 were connected in parallel to the other side of the line. This supplied the Tesla Coil with 12,000 volts at 600 milliamps or 0.60 amp or 7.20 KVA. The maximum arc length with this power was 3 feet. The capacitor was Plexiglas and aluminum sheeting for a capacitance of 0.100 mf. The rotary spark-gap was 6 brass slugs 5/8" x 2" mounted on an old 10" saw blade running at 1,800 rpm. The pop cans were mounted about 10" above the coil, this was my cheap high voltage terminal. The neon transformers did not last very long, one at a time they would fail until there was not enough power to run the coil. The capacitor had problems to, since it was not submerged in oil once in a while it would arc over and if you did not turn off the power soon it would leave a burned track in the plastic. The rotary spark-gap worked good for about 1 hour of accumulative time before it needed cleaning. Next step, was to find more reliable power, submerge the capacitor in oil, and find contacts for the rotary spark-gap that did not corrode over.