The Turn Of The Century Electrotherapy Museum
(C) Jeff Behary 2007

3" Pancake Coil

Finished Coil, 1.25" ID, 3" OD

Click here for a movie of the coil in operation!

4000V transformer, 100 - 200 watts, .024 mfd condenser.
Two spark gaps were tested:  1/4" Tungsten, and a 6" diameter
quenched Kinraide reproduction.

3D rendering of Spark Gap inspired by Thomas Burton Kinraide...

Actual gap.  .105" thick Stainless Steel Disks
Spaced Approx. .020" for discharges shown.

3 - 4" Sparks

Nice brush discharges and effluves...