RE: copper static SG problems

• To: tesla-at-pupman-dot-com
• Subject: RE: copper static SG problems
• From: "Jan Florian Wagner" <jwagner-at-cc.hut.fi> (by way of Terry Fritz <twftesla-at-uswest-dot-net>)
• Date: Thu, 09 Mar 2000 13:51:20 -0700
• Approved: twftesla-at-uswest-dot-net
• Delivered-To: fixup-tesla-at-pupman-dot-com-at-fixme

> Your power level is fairly modest and shouldn't be a problem for the gap you
> described.  Do you have any forced air flow over your gaps?

I've a strong cooling fan (25W) that blasts the gap.
But, errm, as I have connected the fan in parallel with the NST primary,
the fan slows down very much during operation... logical, but I don't see
a way around it (is there any?), as the NST is directly on the mains and I
don't have any 200W isolation transformer, not to mention a variac. Too
$$$ for me...

> In addition to keeping it at a reasonable temperature, performance will
> benefit with forced air as quenching is improved.

Well it get's barely warm after short runs (~40 secs), but the specles are
there after a few seconds.
 
> Or, could there be some contamination (flux?) on your pipes that's
> carbonizing as it heats up? 

Nope, I sanded the pipes thoroughly before mounting them. And was careful
not to get the epoxy on elsewhere but the bottom of the pipe.

> Just how close are they spaced?

About 1.5 .. 2 mm apart.

I still haven't gotten around to what the problem is. The pipes are
ordinary copper, seem to be sufficiently cooled, but oxidize anyway.

What struck me as strange after a bit of thinking is that how come most
coilers copper gaps don't oxidize? 
Would it be better to use "non-rusting" (hardened?) steel?

thanks,
Jan

--
*************************************************
 Jan Florian Wagner
 http://www.hut.fi/~jwagner

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