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Our Classic Ruhmkorff Coil elegantly produces a 50,000-volt, 2-inch spark from only 12 volts DC. We specially designed our interpretation to maintain the historically accurate appearance, and color scheme of the 1800's. We go as far as to antique the wood finish as well as use mechanisms and methods Ruhmkorff himself would have been very familiar with.
We designed our interpretation of Heinrich Ruhmkorff's coil as a high voltage power supply for operating Crookes Tubes and Geissler Tubes, as these machines were used when manufactured on a large scale. Aside from powering vacuum tubes, this coil proves to be an impressive demonstration in it's own right, perfectly suited for explaining Faraday's Law of Induction to even the hardest to impress students.
During our design process, we took the liberty to improve upon coils that were available over 165 years ago by incorporating some modern materials. Acrylic plastic supports the coil and spark gap for the best insulation. Modern high temperature insulation surrounds bus wires to ensure proper isolation. In addition, we employ tungsten alloy contact points in our interrupter mechanisms and modern commercially proven capacitors to ensure dependable operation.