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

15 kV - 9" Pancake Coil Tests
These tests were performed with a 6 series spark - actual gap voltage was around 7,500V.  The Pancake must be oil-filled
to do further testing at higher voltages.  Brilliant effluves and soft brush discharges can be obtained.  The transformer is
a 15kV 60mA neon transformer.   The capacitor is made from 10.5" x 28" 3/16" thick polycarbonate sheets and is rated for
.008 mfd at 50kV or more.  Additional comments below.

The coil discharger is a vertical 12" tall x 1/4" diameter steel rod sharpened at the far end.

This photo has the long post removed.

View of transformer, capacitor directly under transformer, and spark gap in the back.

Close view of the discharges

The brush at this setting is 3 - 4" long from the top.

Note the heavy ionization around the bottom of the Pancake.

A translucent violet haze