Re: 1/2" tungsten roundstock?

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Dr. Resonance by way of Terry Fritz <teslalist-at-qwest-dot-net>" <resonance-at-jvlnet-dot-com>


Dave:

We carry standard 1/2-13 NC screw-in tungsten tips in stock.  They are
tungsten surface (1/4 inch thick) and are welded to copper.  We use 1 1/4
inch long x 1/2 inch dia brass rod axially in the G-10 rotor.  The
electrodes screw into these brass holders.  They are pressed in to the G-10
rotor.

In our commercial coils used 2-3 times per day x 7 days per week they
usually last 4-5 years.  In a private coil operated on an occassional basis
they would probably last your entire lifetime.

For the two large stationary electrodes we use 1 inch dia. tungsten screw-in
electrodes fitted to 1 inch dia. brass holders which slide tightly into 2 x
2 x 2 inch brass blocks.  A 1/4-20 setscrew in the top allows adjustment of
the holders.

In the range of 7.5 to 15 kVA we use this size electrodes.  Above 15 kVA we
use 1 inch dia. electrodes.

Please contact us off-list.

Dr. Resonance

Resonance Research Corporation
E11870 Shadylane Rd.
Baraboo   WI   53913

 > I am in the process of rebuilding my coil system and
 > have built a SRSG with G-10 and will be using tungsten
 > electrodes. I have been considering 1/4" tungsten elec-
 > trodes since that's the largest diametered size available
 > from a welders supply but I was wondering if I should
 > even consider 1/2" diameter tungsten since I plan on
 > running at about 10 kVA? If I should get that large
 > of dia. tungsten for electrodes, where would I aquire it
 > at this size? Would the 1/4" tungsten be large enough
 > for the relatively short runs that most coilers do?