This traditional method of producing high voltages for electrostatic experiments has been enhanced by modern design and construction techniques. The system is self exciting and charge is collected off a synthetic belt passing over rollers - by a comb system positioned near the top and the bottom pulleys. The spun aluminium dome collects the charge. The electrical potential increases until the surrounding air starts to break down. The base contains an earth socket - speed control and an on/off switch. Electrical supply is 230V 50 Hz. Superior Quality.