Re: [TCML] rotary gap disk

[Ed Phillips <evp@xxxxxxxxxxx>]

Acrylic is a very poor choice for an RSG disk.  As you observed, it is brittle and would be dangerously stressed in an RSG application.  Polycarbonate, a.k.a. Lexan, would be a better choice, but still not as good as G10, as Lexan will soften if the electrodes heat up.

If one has limited machine skills and equipment, a propeller RSG is a very good alternative to a disk.  See mine at http://www.laushaus.com/tesla/sync_gap.htm

Regards, Gary Lau
MA, USA"

	There have been countless discussions like this in past times and I always wonder why guys don't use what, at least to me, seems the obvious and almost certainly cheapest choice.  That is a metal disk with insulating hub of almost any material since the tensile stress will all be in the metal and the hub will remain cool.  An additional advantage of the metal disk would be additional cooling due to conduction away from the electrodes.  I know some of the members of this group have used such designs and "in the good old days of wireless" almost all spark gaps, up to many kW power levels, were made that way.

Ed


_______________________________________________
Tesla mailing list
Tesla@xxxxxxxxxxxxxx
http://www.pupman.com/mailman/listinfo/tesla