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

9" Pancake Coil Testing Photos...

9" Pancake Coil Movie

Click here for a second movie!

1.5 turns per layer, 300 turns total, 26 AWG wire.  1" ID, 9" OD.
Brass tube is 1/2" OD.

Low power, approx. 175 watts
4000 watt transformer, .024 mfd condenser, single 3/8" diameter spark gap.

Side view of same.

Medium power - 500 watts.

High power - 750 watts.

Plugging it in on the second day...

Gap is closed so that only a few arcs pass to the primary...

Cylindrical Electrode Removed, discharge is now from bare wire...