How big of a top load can a single transistor Tesla coil use? A pretty big one, apparently.

We meant to get much more done at the shop today, however our efforts were thwarted by extreme cold temperature and wind.

Even with an oversize Toroid and sub freezing temperatures (low 20s F), the circuit still managed to outperform our expectations.

This is by no means an optimized setup, but it clearly demonstrates the flexibility of the driving board.