Is there anyone who has a lead on a supplier for quadrupole magnets?
Hey, Mark, ditto that request!!
I'm not turning up anything. However, I did pick up a hint that the older speaker magnets were quadrupole and perhaps the newer ones are too. I intend to trip around to the shops with my bar magnet and check them out.
Howard
Are you looking for multipole rotor magnets?
(https://overunityarchives.com/proxy.php?request=http%3A%2F%2Fwww.mcmaster.com%2Fcatalog%2F111%2Fgfx%2Fsmall%2F5850kc1s.gif&hash=0c50a949608b62affaa42ee1215eea0940690247)
Try http://www.mcmaster.com? Enter 3466 in the search box to take you to that page.
Jim_Mich
Not quite, Jim_Mich. The configuration looks like this.
what's "quadropole" about that?
"quadro"= four,
all I see is a radially polarised magnet,
with the normal magnetic "dipole" of North and South
oriented radially (from the center outward).
I see no four different poles. No "quadropole"...