This is the first time that I have heard this being asked, but yes, it 
would act like a shorted turn and probably eliminates the windings near 
the top as useful turns   It might be worth trying to make the toroid look 
more like a big C.  It might add a few volts to the final output.  It 
would also lokely change the resonant frequency of the secondary wince it 
will likely change the inductance of the secondary.  A shorted turn at the 
end of the secondary would effectively shorten the length of the 
secondary.  By "unshorting" it the inductance would increase a bit.
Skip Malley
At 03:01 AM 9/5/2008, you wrote:
Just curious if a corona ring on top of the  secondary coil, or the 
torroid
itself acts like a shorted turn? If so, is  it just insignificant?
Tony Greer
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