* Originally By: Lisanap-at-cats.ucsc.edu
 * Originally To: Richard Quick
 * Originally Re: RE: TESLA VIDEO
 * Original Area: UUCPE-Mail
 * Forwarded by : Blue Wave v2.12

From: lisanap-at-cats.ucsc.edu
Date: Mon, 30 Jan 1995 19:53:40 -0800
To: lisanap-at-cats.ucsc.edu, richard.quick-at-slug-dot-org


The gap parts I bought are from a Miller welder, although you should
be able to get gap assemblies or parts from Lincoln and other welder
companies as well.  Gary Legel of TCBA turned me on to these.
The Miller part numbers are:
     095 621 base       $3.50     porcelain, each one holds 2 gaps
     020 622 point holder $8.52   Al, 4/base, cooling fins all around
     020 603 HF point   $3.25     steel slug w/ tungsten face, 4/base

Prices are for each piece.  This also comes as an assembly.  I had some
inspiration at the time to ask the guy to price it out per piece and
it came out 15 or 20 dollars less than the assembled unit.  Got the screws
at the hardware store.  You could also just order what you wanted and
build the rest.  The points are pretty nice and I don't know any other
source for tungsten.  If you go to the welding shop though, ask if they
have any used ones from junked units.  You might find some real cheap
that way.  Also some of the ones I've seen did not have cooling fins
like the Miller ones.

Here is another idea for someone looking to add on an air quenching
device.  Woodworker's Supply, Inc. (1-800-645-9292), mail order catalog
has a blower that connects to an air compressor and has a magnetic base.
Off the mag base is a plastic articulated arm with a fan nozzle on the
end.  Part # 826-182  $15.95.  This doesn't have the simplistic elegance
of the air quenched gaps you designed, but could be a nice add on.
I have not tried it though.  Just a thought.

I'm still working out the specs on my new attempt.  I ran some numbers
thru one of the calculators (can't remember which one) and it told me 
that for a 4" by 16", 22 gauge would not give me a length within the
parameters of that program (an optimum length, I guess). You push for
22 gauge, right?  Should I stretch the secondary ratio a bit to get 
that length or drop to 24 gauge?

I'm going to start working on the 60' of 3/8" tubing at 30 degrees.
Is that angle good?

Also thinking about caps.  Haven't run any calcs yet.  Plate or roll?
Plate or roll?

More soon,

Mark R. Napier
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