RE: Magnetic quenching.

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

Original poster: "David Trimmell" <humanb-at-chaoticuniverse-dot-com> 

Dave, what power level have you used your magnetically quenched gap?
Also, have you used a gap like this on a PT or other non-shunted
transformer? I have 4 1" cube NdFeB magnets I am interested in using for
this application. They can easily lift 80-90 lbs.

Regards,

David Trimmell

-----Original Message-----
From: Tesla list [mailto:tesla-at-pupman-dot-com]
Sent: Thursday, March 11, 2004 10:36 AM
To: tesla-at-pupman-dot-com
Subject: RE: Magnetic quenching.

Original poster: "David Thomson" <dave-at-volantis-dot-org>

Hi Marco,

  > Have you got any evidence that magnetic quenching rises the gap
  > threshold voltage? If yes, can you quantify it?

No, I don't.  As I noted in my earlier post in this thread, I presented
a
theoretical dimensional analysis of the magnetic quenching.  I have a
pretty
nice test bench now, but I don't know how I can measure the
electrostatic
potential of the gap terminals and magnetic flux of a running system.
If
there are engineers here who have some ideas, I would be willing to
entertain them.

  > Can you post more information about your magnetic gap arragement?

http://www.tesla-coil-builder-dot-com/images/sparkgapmagnetic01.jpg
You can see the magnetic spark gap I have been using up until now at the
above link.  There are three more magnets under the wood block.  The
rods
are thoriated tungsten ground flat at the gap.  There is a noticeable
change
in coil operation (intensity of spark, louder operating) when the
magnets
are used as opposed to when they are not used.

As I mentioned in a previous post, I attribute most of the cool running
of
the coil due to the secondary construction technique (Tesla also used it
for
some coils after 1905.)  The magnetic gap itself is a loose
modernization of
Tesla's magnetic spark gap.

Dave