In a message dated 04/03/2009, rog@.......... writes:

I am  working on a VS system with Larry's coil, magnet and signal-chain.
Is there  any impact to the pick up coil signal from the strong magnets 
mounted  nearby?
Rob



Hi Rob,
 
    It depends whether the magnets can move with  respect to the coil. 
Interactions between moving and stationary magnets may  give problems.
 
    The U Alnico magnets do not give a very strong  output voltage. I get 
over 20x the voltage output using a quad NdFeB magnet  block. Have a look at 
_http://jclahr.com/science/psn/chapman/as1%20damping/index.html_ 
(http://jclahr.com/science/psn/chapman/as1%20damping/index.html)  and  at  
_http://jclahr.com/science/psn/chapman/lehman/index.html_ 
(http://jclahr.com/science/psn/chapman/lehman/index.html) 
 
    What period are you trying to get? 
 
    Regards,
 
    Chris Chapman






In a message dated 04/03/2009, rog@.......... writes:
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  working on a VS system with Larry's coil, magnet and signal-chain.
Is t=
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  any impact to the pick up coil signal from the strong magnets 
mounted=20
  nearby?
Rob


Hi Rob,
 
    It depends whether the magnets can move with=20
respect to the coil. Interactions between moving and stationary magnets=
 may=20
give problems.
 
    The U Alnico magnets do not give a very st=
rong=20
output voltage. I get over 20x the voltage output using a quad NdFeB ma=
gnet=20
block. Have a look at http=
://jclahr.com/science/psn/chapman/as1%20damping/index.html and=20
at  http://jcla=
hr.com/science/psn/chapman/lehman/index.html
 
    What period are you trying to get? 
 
    Regards,
 
    Chris Chapman