Re: TSG Construction

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

Original poster: "Terry Fritz" <twftesla-at-qwest-dot-net>

Hi Steve,

I can fairly easily position the copper loop so the arc goes directly
between the electrodes without hitting the trigger loop.  I use welders
glass to watch the arc and determine what is going on.  I don't think you
have to get to close since the ~30kV trigger pulse seems to easily trigger
the gap regardless.

http://hot-streamer-dot-com/temp/MarcGap/

Cheers,

	Terry


At 08:54 PM 12/25/2001 -0700, you wrote:
>Gappers,
>
>I went to Lowe's Hardware store yesterday looking for ideas for supports for
>tungsten electrodes for a TSG.  I wanted something which would absorb,
>conduct and dissipate heat and hold the tungsten rods (3/16 inch) firmly and
>allow the gap spacing to be varied and didn't cost much.
>
>I ended up with half inch copper male and female threaded pipe adapters.  I
>drilled a hole 3/16th inch through the female adapter through which the rod
>goes.  The male adapter screws down against the rod and holds it firmly and
>adds more copper mass.  These are held vertically by a copper T coupling
>bolted to the GPO3 base.  Thus the only tools needed were a drill and a
>propane torch to solder the T to a piece of 1/2 inch pipe to the female
>adapter.  With a bit of care, the electrodes line up well and it looks good
>and it is cheap.
>
>Has anyone used a piece of sheet metal with a hole in it (say 1-1.5 inches -
>maybe a large washer) with the edge of the hole filed very sharp (like a
>knife edge) as the trigger electrode?  This is placed perpendicular to the
>main gap electrodes so that the main arc goes through the center of the
>trigger electrode hole.  Supposedly Maxwell Corp discovered the sharp edge
>greatly increases the field intensity and causes multiple channel arcs in
>the main channel, lowering the gap resistance and thus the losses.  Seems
>worth a try.
>
>Terry I noticed you did a variant of this with a wire loop as a trigger
>electrode.  How does that work as compared to the typical setup with the
>trigger electrode being similar to the main electrodes but perpendicular to
>them?
>
>--Steve
>
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