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RE: Static Gap question.
Original poster: "David Thomson" <dave-at-volantis-dot-org>
Yes, I use rare neodymium magnets for my spark gaps. You could use any
strong magnet. Tesla used a strong electromagnet for his.
For the terminals, I use tungsten welding rod and grind the ends flat each
day I fire up the coil. The spark gap works great for me. The spark gap is
also very easy to construct. The magnets hold themselves in place. I
position the gap of the tungsten rod right in between the powerful magnets.
It's easy to adjust the strength of the magnetic field by adding or
subtracting magnets and/or adjusting the distance between the magnets.
I mentioned the tungsten balls on McMaster Carr because they are both cheap,
and I believe are a better shape for the spark gap. Now that I have a new
HP 34970A coming in, I'll see if I can test the spark gap somehow. (But I
can assure you it won't be my first test. I'm not going to get anywhere
near high voltage until I feel comfortable with sensor safety.)
> -----Original Message-----
> From: Tesla list [mailto:tesla-at-pupman-dot-com]
> Sent: Wednesday, February 11, 2004 10:28 PM
> To: tesla-at-pupman-dot-com
> Subject: RE: Static Gap question.
> Original poster: Brett Miller <brmtesla2-at-yahoo-dot-com>
> I have some rare earth neodynium (did I spell that
> right?) magnets I pulled out of some old hard drives.
> I wonder if they would have suffient strength to
> quench such a gap at about 1KVA or so. How about
> 2KVA? I know some people have claimed success with
> magnetic quenching in the past and I've always wanted
> to try it. I think I'll search the archives.
> --- Tesla list <tesla-at-pupman-dot-com> wrote:
> > Original poster: "David Thomson" <dave-at-volantis-dot-org>
> > You might want to make your static gap with tungsten
> > carbide balls. Do a
> > search for "tungsten ball" at www.mcmaster-dot-com. You
> > can quench the gap with
> > permanent magnets.
> > Dave
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