In a message dated 28/03/2006, Bobhelenmcclure@....... writes:

The  biggest problem I have with this design is the diamagnetism of the 
copper  wire. Having a core of acrylic plastic for the coil and an outer plate of  
acrylic plastic helps to reduce net diamagnetic force on the coil assembly,  
since the plastic is also diamagnetic.


Hi Bob,
 
    Not all Copper wire is diamagnetic! It was because  I had noticed force 
effects when windings were near or over the edges of  the magnets that I used 
the 1" square magnets and the narrower coils.
 
    Regards,
 
    Chris






In a message dated 28/03/2006, Bobhelenmcclure@....... writes:
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  biggest problem I have with this design is the diamagnetism of the copper=20
  wire. Having a core of acrylic plastic for the coil and an outer plate of=20
  acrylic plastic helps to reduce net diamagnetic force on the coil assembly=
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  since the plastic is also diamagnetic.

Hi Bob,
 
    Not all Copper wire is diamagnetic! It was beca=
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I had noticed force effects when windings were near or over the edges o=
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the magnets that I used the 1" square magnets and the narrower coils.
 
    Regards,
 
    Chris