The Turn Of The Century Electrotherapy Museum http://www.electrotherapymuseum.com Some Experimental Coils A small experimental Tesla Coil Produces 3" sparks or more with 3.5kV 8mA, .006 mfd Copper Ribbon Pancake Coil - 5/16" copper ribbon, 1/4" silicone interleaves (1/32" thick) Coil is getting impregnated in paraffin wax Nighttime views of Carbon Arc lamp