The Turn Of The Century Electrotherapy Museum
(C) Jeff Behary 2010 

Solid State Dimmer Circuit for Induction / Ignition Coils

Arc will extend 1.5" or more under oil

Same experiment to current-limit a microwave oven transformer (MOT)

Same circuit powering an electromagnet from a Violet Ray machine.  Two layers of wire originally
used for a cautery circuit were used for the primary winding.

The small induction coil can power Geissler tubes.

(C) Jeff Behary, 2010