Hi Gary,

On the small neo magnet photo it appears the magnets are 90 degrees =
turned from what I would think to locate them.  Did you try the other =
orientation?

I have used several speaker magnets.  On most the 4 bolt holes do not go =
through the magnet ring itself.  If you insert and tighten longer =
threaded bolts against the magnet, the pole ring will pop loose and then =
you can easily turn the gap wider to probably 1 cm or more on that =
magnet.  Even if it won't come loose it is fairly easy to open the gap =
on a lathe but be careful of the turnings as they are very sharp and the =
magnetic field tends to align them into finger cutting angles.  =
Extending the center pole into the coil with a short fat bolt after the =
gap is widened also seems to increase output. =20

Randy







Hi Gary,
 
On the small neo magnet photo it =
appears the=20
magnets are 90 degrees turned from what I would think to locate =
them.  Did=20
you try the other orientation?
 
I have used several speaker =
magnets.  On most=20
the 4 bolt holes do not go through the magnet ring itself.  If you =
insert=20
and tighten longer threaded bolts against the magnet, the pole=20
ring will pop loose and then you can easily turn the gap =
wider to=20
probably 1 cm or more on that magnet.  Even if it won't come loose =
it is=20
fairly easy to open the gap on a lathe but be careful of the turnings as =
they=20
are very sharp and the magnetic field tends to align them into finger =
cutting=20
angles.  Extending the center pole into the coil with a short fat =
bolt=20
after the gap is widened also seems to increase output.  =

 
Randy