Re: Rotary Spark Gap. (materials for...)

From: 	Jim Lux[SMTP:jimlux-at-earthlink-dot-net]
Sent: 	Thursday, December 04, 1997 10:17 AM
To: 	Tesla List
Subject: 	Re: Rotary Spark Gap. (materials for...)

I wouldn't use plexiglas (acrylic) or polycarbonate (Lexan). If they get
hot, they get soft, which is bad news at several thousand rpm. Use a fiber
composite, like fiberglass G10 or even XXXP paper/phenolic. They have
better hi temp characteristics, and the strength is provided by something
that doesn't soften (i.e. glass or cellulose fibers).

You might check the local welding supply store for tungsten electrodes in
various sizes. Available in a bewildering variety, etc.