Re: Magnetic Field in a Flat Spiral

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

Original poster: "David Sharpe by way of Terry Fritz <twftesla-at-qwest-dot-net>" <sccr4us-at-erols-dot-com>

Ed

I'm in fact working on upgrading my 6 point biphase super series
ASRSG with ceramic magnets out of a microwave magnetron.
Part of ongoing IDR adventure.

Magnetic quench assist on HV electrodes that receive 100%
duty cycle, other electrodes are 50%DC.  Will advise list of
outcomes, and provide JPGs of before and after modifications.

Regards
Dave Sharpe, TCBOR
Chesterfield, VA. USA

Tesla list wrote:

> Original poster: "Ed Phillips by way of Terry Fritz <twftesla-at-qwest-dot-net>"
<evp-at-pacbell-dot-net>
>
> Tesla list wrote:
> >
> > Original poster: "David Sharpe by way of Terry Fritz
> <twftesla-at-qwest-dot-net>" <sccr4us-at-erols-dot-com>
> >
> > Paul N., All
> >
> > NIB - Neodymium-Iron-Boron Rare Earth Magnets.
> > One supplier is Edmund Scientifics in USA. Used
> > them as a suppler for work, recommended.
> >
> > <http://www.scientificsonline-dot-com/>http://www.scientificsonline-dot-com/
> >
> > Relatively inexpensive for the extreme power of these
> > magnets.  Edmunds stocks various sizes and shapes
> > most prevalent are rectangular or disc shaped.
>
>         Edmunds has a good stock, but at very high prices.  Wondermagnet
> (www.wondermagnet-dot-com) has a good selection too, at much lower prices.
> They have some interesting things like small spherical magnets, again at
> pretty good prices.  Their web site has interesting links and also
> possible experiments which can be performed with magnets.  I haven't
> bought anything from them, but my friends who have report complete
> satisfaction.  All Electronics (www.allcorp-dot-com) often has some good
> magnet buys too, and I have a lot of their magnets around the shop
> here.  Another source of really cheap magnets is swap meets, but that
> takes more work on your part.  Finally, Radio Shack has some need little
> disks which are great for static magnetic levitation demonstrators.
> Less than a buck each.
>
> > Watch the warning(s) on these magnets, they nearly
> > 10X more powerful then old school alnico magnets!
> > They can destroy credit cards, FD's, and with higher
> > power units, can remove skin from fingers/or cause
> > blood blisters, when contacting magnetic steel.  Some
> > units removed from old HD are so powerful they can
> > not be pulled normally apart, they must be slid apart.
>
>         How true!  There has been one of the head drive magnets from a
very old
> IBM head drive stuck to my Mosler safe for a couple of years, and even
> stayed there during a 20 mile move!  Will eventually have to slide it
> off, but that's hard because of the rough finish on the safe, and there
> will be ugly scratches when the deal is done.  King Kong might be able
> to pull it off with his fingers, but I don't think there's a man alive
> who could.
>
> > Wear safety glasses, they are brittle and can shatter
> > like glass.  Having a super magnet sliver in your eye
> > is something I don't want to ponder...and has
> > happened to other folks in the past.  Consider what
> > happens in that event when you walk by a steel door
> > trying to get medical assistance...enough said.
>
>         The dust is highly flammable in addition to the mechanical problems
> with the splinters.
>
> > <<Off topic shield down Terry!!!>>   :^)
> >
> > Regards
> > Dave Sharpe, TCBOR
> > Chesterfield, VA. USA
>
> Ed
>
> P.S. To perhaps get this by Terry, I suspect that some of these magnets
> could be used as very effective magnetic blow out devices for spark
> gaps, and would sure like to encourage someone to give it a try and
> report the results here.  Should be reasonably easy and cheap to get at
> least a couple of thousand gauss across a 1" gap.