Hi all,

Check out the variety of magnets on Forcefield or Wonder
magnet.com for a unique variety of shaped magnets:

http://www.wondermagnet.com  (frame or no frame) or:

http://www.wondermagnet.com/dev/main.html

http://www.wondermagnet.com/dev/magnets.html

The items #'s 1, 5, 7, 13, 22 & 23, could all have amateur potential
for home brew seismometers, with their coil, feedback and
even possible damping application uses.

Items 1 & 22 are within + or - one thousandth of an inch, and
for myself they "could" be used for coil pickups; and possibly
a variety of "speaker coil" applications.

Item 13; a 1/2" rod, possibly suggests application for feedback.

Item 5, although more costlier, maybe easier to work with in
seismometer construction, and any pickup "relay coil" used
between will have more area to drift in.

As a rule, most of these units are much cleaner in appearance
than competing surplus sources.

Forcefield is a trustworthy business, and their packing
procedure is very considerate of the enclosed magnetic
influence it could deliver on other mixed shipping packages.

Most unusual is their sphere magnet; it looks for all the world
like a ball bearing.  Even the cube can be stacked....

Take care,

Meredith Lamb


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