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RE: tungsten alloys for SG electrodes?



Original poster: "David Thomson" <dwt@xxxxxxxxxxxx>

Hi David,

> I'm currently in the process of trying to source some rod stock
> tungsten for electrodes for an RSG. I noticed that McMaster-
> Carr has some tungsten alloy as well as tungsten carbide in
> rod form and I was wondering about the suitability of these ma-
> terials for SG electrodes for a high powered coil system.

I realize you're building a rotary spark gap, but the tungsten balls are
excellent for a static spark gap.  I brazed the tungsten balls on the ends
of tungsten rods and they work great.  The balls on McMaster Carr are grade
C1/C2, which is very hard and doesn't pit.

I'm now curious as to whether a spheroid contact would work with a rotary
spark gap.  I may try to build one.

Dave