50mm Spark Induction Coil, 11.5 x 7 x 6" Manufacturer_Eisco Two variable 0 to 6V

Two variable 0 to 6V DC outputs paired with two fixed 6V/10W and 12V/20W AC outputs on this power supply controller

and wave-shaping student investigations

the megohm-scale reference for high-impedance bridge circuits and electrometer investigations

paired with electroscopes and pith balls in classic electrostatic-charging investigations

Adjustable height from 3 to 16 inches distinguishes this polished hardwood single-funnel stand

50mm Spark Induction Coil, 11.5 x 7 x 6" Manufacturer_Eisco Two variable 0 to 6VBuilt on a step up transformer with an electromagnetic shaker pulsing the primary winding, this coil draws tens of thousands of volts from a 9 12V DC source to strike 50mm sparks.