The Turn Of The Century Electrotherapy Museum
http://www.electrotherapymuseum.com
(C) Jeff Behary 2007

Quenched Spark Gaps of various designs... 15. / 16. Sept 2007

Dual quenched gap using 3/4" diameter Tungsten

Side view showing gaps.  Lower gaps are mounted to individual heat sinks, upper gaps are attached to a bridge pressed against a 6" disk heat sink / percussion plate

Side view of gap.  Note that the light and noise are somewhat shielded by the large heat sink.

New 1.25" Diameter Tungsten Spark Gap, Top view.

Side view showing close up of gap... The three rubber insulators can be compressed to adjust the size of the gap.  Three points are used to accurately adjust the two planes to make them parallel.

A special woven brass washer is used between the tungsten contact and aluminum heat sink to allow maximum contact between the slightly tapered bottom of the tungsten contact and the flat heat sinks.  The tungsten disks are .060" thick are permanently fixed to 5/16 - 18 Elevator Bolts.

Bottom view of the gap.

Tungsten gap made from 1/2" x 3" x .060" thick tungsten sheet mounted to flat aluminum heat sinks with copper cooling fins.

Gap is mounted to a marble base, as the discharge occurs close to the surface of the base.

Adjustable Tungsten Gap - 1/4" Tungsten.  Stationary segments that can be short-circuited to lower the voltage of the gap.

Side view with rod removed.

Gap in operation with only 2 of the gaps in use.

Adjustable 1.25" Diameter Tungsten Spark Gap - Heavy Duty

Side view showing discharge surfaces.

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