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Re: Top Toroid



In a message dated 97-01-30 03:33:50 EST, you write:
>snip
><<    One quick remark. try to construct the cap with the least amount of
> metal just a thin shell of metal is best (aluminum duct tape on 4 pvc
> joints fitted together works well) The reason being is that the top cap is
> also in the midst of the magnetic field that is set up by the primary ind.
> If the terminal cap was a solid chunk of metal, the changing magnetic
> field would set up an E field in the cap and induce current flow causing
> heating of the Terminal cap which is a waste of energy. you don't want the
> toroid to soak up the energy of the magnetic field you want that energy to
> be soaked up by your secondary coil.
>      There is a good toroid home brew description on Bill Beaty's Tesla
> web page.     
  >                      enjoy!
 >                           --Bert S.
  >>

Interestingly, toroids (even thin metal ones) get quite warm when used on a
tube coil, at high power levels.
John Freau