Safety Shutdown prevents accidental shock if contact is made to the ladder elements.

The finished unit intended for museums and similar displays is fully enclosed with the traveling plasma arc inside of a clear plastic shroud. The base of the unit is a plastic enclosure.

An internal fan supplies a slight over atmosphere pressure at the bottom starting point of the arc ladder to prevent any arc hangup from forming.

Produces a traveling wave of plasma that starts at the base of the ladder electrode elements, rises and widens as it ascends and evaporates into space. The vertical travel distance of the arc is about 16" and reaches a width of 2-3 inches as it extinguishes. It then repeats and continues traveling up the ladder, evaporating and restarting.

Allows varying the arc texture by a simple control that also is the main power switch. Texture can be a thin wispy like spark to a heavy hot energetic plasma arc.

Size of base is 10 x 7.5" with an overall height of about 21.5" (with shroud), and a weight of about 3 pounds. Runs from wall power (115 vac at 2 amps) through a standard three-wire grounded cord. A 220 volt version (JACK30-220) is also available for international use.

Instructions