Demonstrates phenomena associated with high frequency, high voltage electric current. Two circular, transparent, plastic sheets with protective covering house the circuit that includes high-tension capacitors. On top of this circular base mounted the primary secondary coil. Spark gap is adjustable. Produces output to the order of 50kV, with a frequency of approx. 1MHz. Complete with bulb holder, bulb, one disc terminal, neon bulb discharge electrode, and one each reel of flexible PVC wire and enameled copper wire. With instruction.