Subject: Magnets

Chris, in a recent email to the PSN list you mentioned that you were using=
 four NdFeB magnets in your "pickup" setup. Can you tell me the number/siz=
e of these magnets and are they in any special configuration? Thanks, Ed.
?
Hi Ed,
?
??? Check out www.jclahr.com/science/psn/chapman?for drawings of my design=
s. I use 1" x 1/2" x 1/8" NdFeB bar magnets, magnetised through the large=
 faces. Two 1/4" thick mild steel backing plates are provided with the mag=
nets mounted in N/S pairs with the 1/2" ends adjoining. The 2" long N/S pa=
ir on one plate is opposed by a 2" S/N pair on the opposing plate. The pla=
tes are mounted on 1/4" OD zinc plated mild steel bolts. This is very effe=
ctive.
?
??? Regards,
?
??? Chris Chapman
?

?


Subject: Magnets




Chris, in a recent=
 email to the PSN list you mentioned that you were using four NdFeB magnet=
s in your "pickup" setup. Can you tell me the number/size of these magnets=
 and are they in any special configuration? Thanks, Ed.


 


Hi Ed,


 


   =
 Check out www.jclah=
r.com/science/psn/chapman for drawings of my designs. I use 1" x=
 1/2" x 1/8" NdFeB bar magnets, magnetised through the large faces. Two 1/=
4" thick mild steel backing plates are provided with the magnets mounted=
 in N/S pairs with the 1/2" ends adjoining. The 2" long N/S pair on one pl=
ate is opposed by a 2" S/N pair on the opposing plate. The plates are moun=
ted on 1/4" OD zinc plated mild steel bolts. This is very effective.


 


   =
 Regards,


 


   =
 Chris Chapman