Hi all,

Just got a ring magnet from All Electronics
Corporation.  Its their cat #MAG-50.  Its
1.240" in outside diameter, .840" inside
diameter, by .250" thick.  

My postal scale (non-precision)says about
..8 ounce.  Am getting the strong feeling
that for maximum weight, its the ring magnets
that work better than even disk magnets.  
More mass could mean more enertia stabilility,
if temperature problems can be controlled.
This is the largest weight I've seen.

It floats with one of my carbon units, and
acouple side bar magnets.  I was surprised!
It will be interesting to try bismuth with
this sometime.

All electronics identifies it as a neodymium
magnet; but I have suspicions it could be
another element like samarium or ?; as it
doesn't seem to have the magnetic attraction
of my other neo's...i.e., weaker overall.

They come unplated, and have a silver-gray
with a tinge of yellow color to them.

With this size, vertical vibrations seems to
be easily displayed by eye, with the magnet
tipping back and forth horizontally.

Check out: http://www.allcorp.com
See magnetic devices.

For the coil/magnet crowd:
All Electronics also has a curved neo magnet,
but this is nickel plated. 1.735" length X
1.435" X .245" thick.  $5.50 plus shipping
handling; probably a very good buy if one
can build a mechanism to keep the magnets
apart.  Believe the curve face is somewhere
in the neighborhood of some 3-4" diameter,
which means one could add magnets for
larger coils other than small relay coils.
Very nice clean unit, except for some glue
deposits on the outside back.  Probably a
cheaper and better buy than the Forcefield
unit, of the prior message.

Meredith Lamb




Signup for your free USWEST.mail Email account http://www.uswestmail.net

_____________________________________________________________________

Public Seismic Network Mailing List (PSN-L)