A Classic Spark-Gap Tesla Coil

I built this Spark-Gap Tesla Coil (with some help from a couple of friends, Jeff & Brian) from plans and parts purchased from Alan Majernick @ TeslaStuff.com.    Alan ships fast, is happy to help, and has been an overall joy to work with.

Sparking Tesla Coil

And here’s a shot by day, before the final wiring and control box were completed.  Photos by Melissa Bishop.

Tesla Coil

There were only a couple of hiccups getting it going, all related to arcs burrowing through the grade XX phenolic used to support the spark-gaps.   I switched to nylon bolts, and its been quite a robust device ever since.  Currently “in production”,  the coil regularly runs 20+ minutes at-a-time.

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