Re: Magnets

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "Drake Schutt" <drake89@xxxxxxxxx>

If you're so interested in magnetics I would check out the maglab at 
Florida State University.  They're one of the top magnetics research 
facilities in the world and do all kinds of crazy stuff.

On 4/16/07, Tesla list <<mailto:tesla@xxxxxxxxxx>tesla@xxxxxxxxxx> wrote:
Original poster: <mailto:gary350@xxxxxxxxxxxxx>gary350@xxxxxxxxxxxxx

You missed the point I guess I should explain better.  You should
have seen the TV show.  One thing they showed was medical
magnets.  It has been discovered that a magnet can make a broken bone
heal faster in old people.  Electro magnets and perment magnet pads
are taped to the damaged area and the bone heals several times
faster.  It has also be discovered a magnetic field speeds up the
growth of cancer cells.  The TV shows showed a large round 15 ft
diameter electro magnet designed to concentrate the magnetic field of
dozens of magnets in the center of a circle producing a super
saturated magnetic field in the center capable of holding a plasma in
suspension.  Don't ask me what that is I have no idea or what good it
would be.  Magnetic stuff is useful in the medical industry we can do
things that were not possible 40 years ago.  I remember them showing
how to float an object with a magnet field I can not remember how
that worked I wish I had recorded the TV show.  There was a lot of
other good stuff I bet if you do a web search you might be able to
find it and down load it. They showed how magnets are made and
magnitized I went to my shop and build a magnitizer.  I took a tiny
speaker magnet 5/8" diameter by 1/2 long and tested it.  It could
pick up about 1 lb.  I zapped it with my magnitizer and found I could
not remove it from a piece of metal even with a pair of plyers for
several seconds.  A magnet is capable of soaking up a magnetic field
like a spunge soaks up water.  The magnet has a half life of about 2
seconds.  I attached the tiny magnet to a 500 lb lift and zapped the
magnetic with my magnitizer the tiny magnet picked up a 250 lbs piece
of steel for about 2 seconds.  It would hold 100 lbs up for about 6
or 7 seconds.  It would hold up 25 lbs for about 10 to 12
seconds.  After about 30 seconds the magnetic power retuned back to
normal. It has been several months since I saw the show I think I
have forgotten more than I ever knew.

Gary Weaver




-----Original Message-----
>From: Tesla list <<mailto:tesla@xxxxxxxxxx>tesla@xxxxxxxxxx>
>Sent: Apr 15, 2007 9:23 PM
>To: <mailto:tesla@xxxxxxxxxx>tesla@xxxxxxxxxx
>Subject: Re: Magnets
>
>Original poster: Ed Phillips <<mailto:evp@xxxxxxxxxxx>evp@xxxxxxxxxxx>
>
>Original poster: <mailto:gary350@xxxxxxxxxxxxx>gary350@xxxxxxxxxxxxx
>
>Did anyone see the TV show a few months ago about magnets.  They
>said, there was not much known about magnets 40 years ago they were
>not considered very useful.  Magnet technology has increased 30 fold
>in the past 10 years and now have 1000s of applications.  Has any
>research been done with magnets on a Tesla Coil?"
>
>    That TV show was putting out pure uninformed nonsense.  Magnets
>(I assume you mean permanent magnets as electromagnet have no
>mysteries at all) have been thoroughly understood even at the
>theoretical level for at least 100 years and used by the billions
>over the years.  Just about every speaker in every radio built since
>1940 (and many before that) uses permanent magnet field structures
>and ALL telephone receivers ever built from the first Bell one on
>used permanent magnets in the receivers.
>
>    What has happened in the past 40 years that a number of new
>permanent magnet materials have been developed which offer greater
>energy in a given volume and their price has become reasonable.  At
>one extreme are the ubiquitos ceramic magnets which have low energy
>but are dirt cheap and at the other would be the NdFeB magnets which
>have far more energy and are now quite affordable.
>
>Ed
>
>
>
>