Hi Chris,

I put up a illustration web photo and text page with two "imaginary ring
magnets and a imaginary coil".  Initially the subject
delved only with the 2 ring magnets and a coil; but in two different
polarity configurations.  In those 2 simple setup/s the question
is, which would be better (?), as is;....and initially without regard to
adding end plates and cores/iron rods/bolts.

http://seismometer.googlepages.com/nssn

I totally agree with the field enhancing use of iron if one can do it.   If
I read your description right...you are using the classic
one magnet.

Of course, Randys email digest setup had 4 magnets...but it was essentially
the same as Bretts thought where the central magnets
were opposing, and, according to Randy (with added iron), it worked.

Take care, Meredith

On Tue, Jun 3, 2008 at 11:03 AM,  wrote:

> In a message dated 2008/06/03, paleoartifact@......... writes:
>
> Hi Meredith,
>
>        Sorry, but I don't understand Brett's suggestion. You would get the
> best results by adding end plates and a central core. One end would be a
> flat plate with the circular central core mounted on it. The other end would
> be an outer ring at the end of the magnets and a gap to the central core.
> This would concentrate all the magnetic flux in the circular gap between the
> central core and the end ring. The end ring collects most of the flux and
> concentrates this over the ring gap. The magnetic saturation of iron is
> about 1.6 x that which is produced by Neo magnets.
>
>        Regards,
>
>        Chris
Hi Chris,

I put up a illustration web photo and text page with two "imaginary ring magnets and a imaginary coil".  Initially the subject
delved only with the 2 ring magnets and a coil; but in two different polarity configurations.  In those 2 simple setup/s the question


is, which would be better (?), as is;....and initially without regard to adding end plates and cores/iron rods/bolts.

http://seismometer.googlepages.com/nssn




I totally agree with the field enhancing use of iron if one can do it.   If I read your description right...you are using the classic
one magnet.

Of course, Randys email digest setup had 4 magnets...but it was essentially the same as Bretts thought where the central magnets

were opposing, and, according to Randy (with added iron), it worked.


Take care, Meredith

On Tue, Jun 3, 2008 at 11:03 AM,  <ChrisAtUpw@.......> wrote:

In a message dated 2008/06/03, paleoartifact@......... writes:






Hi Meredith,



       Sorry, but I don't understand Brett's suggestion. You would get the best results by adding end plates and a central core. One end would be a flat plate with the circular central core mounted on it. The other end would be an outer ring at the end of the magnets and a gap to the central core. This would concentrate all the magnetic flux in the circular gap between the central core and the end ring. The end ring collects most of the flux and concentrates this over the ring gap. The magnetic saturation of iron is about 1.6 x that which is produced by Neo magnets.   






       Regards,



       Chris