The Turn Of The Century Electrotherapy Museum http://www.electrotherapymuseum.com Experimental Quenched Tungsten Spark Gap Based on Herman Fischer / Hugh Thompson Gap Enclosed spark chamber for introducting hydrocarbon gas 4 Series Spark Gap, Adjustable Aluminum disks with tungsten press-fit into brass contacts Two contacts per middle gap section Insulators are XX Phenolic (Bakelite).  Copper shorting rod allows quick adjustment for number of gaps Port for introducing liquids or gases Introducing Turpentine Appearance of gap in operation ____________________________________________________________________________________________ 18. Jan 09 - Update: Complete Gap Mounted To G10 Base An array of similar spark gaps made this weekend... JuJu (neighbour kitten) Coming soon: Poulsen Arc Powered Tesla Coil Mejla and Hippo!