The Turn Of The Century Electrotherapy Museum http://www.electrotherapymuseum.com         26. June 2008 - More Tests:  18" Tall 4.5" OD Coil with 6" Copper Sphere = 24" Discharges (2) 3.5" OD Coils insulated with 1/4" Paraffin Wax Centered in 4.5" OD PVC Pipe with 6" Copper Spheres = 18" Discharges Note:  Most of these photos are 1/2 or 1 second exposures. Click here for a movie! Approx .1 MFD Condenser; 4 Turn Copper Ribbon Primary Must raise that ball a bit higher! Low power discharges Medium power discharges... Still a nice array of discharges BIPOLAR COILS: I definitely need to cover those pipes with some black cloth! Quick snap - 1/4 second or so. .015 MFD