A high-voltage transformer I built in 2007.
Based on the work of Nikola Tesla. 120V 60Hz AC power is kicked up to 15kV using a neon sign transformer. This charges up a capacitor, which is then discharged across a spark gap at high frequency. This excites the secondary coil, where a very high voltage is produced!
Dedicated to my uncle, Tony Bowers (1948-2007).