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Re: Secondary Coil Electrostatic Charge

tesla-at-grendel.objinc-dot-com On Mon, 18 Mar 1996 08:32:03 +0700, you
wrote:


>Hello Everybody,
>
>I am Robert Stephens and new to this group.  I've been following your 
>mail exchange for the past week with interest.  The subject of 
>electroststic charge being deposited on the surface of the TC 
>secondary winding has been an interesting topic of discussion over 
>the past few days.  I see that several of you now have surmised the 
>correct mechanism of storage of this charge (dielectric polarization, 
>and to a lesser degree static surface charge of the insulation on the 
>secondary windings), but can anyone explain WHY an alternating 
>current high voltage source like a TC can charge dielectrics 
>(capacitors) just like a Van de Graaff generator?  
>
[snip]
>-a properly coupled TC with a well designed top load terminal, even a 
>large coil driven to multi megavolt levels will have hardly any 
>secondary residual surface charge after a good run.
>-an overcoupled secondary will develop firecracker hot areas of 
>surface charge in a specific zone, or zones along its length.  This 
>occurs in those areas where the coil will begin to arc across its own 
>windings if pushed hard enough.
>
YES, I've observed the same - 10 hemisphere => charge 28" toroid => no
charge.

[snip]
> IF YOU TRY THIS SAME 
>EXPERIMENT WITH A VAN DE GRAAFF GENERATOR INSTEAD OF THE 
>SPARK GAP DRIVEN T.C. YOU WILL GET EXACTLY THE SAME EFFECT!
>
>The answer to this phenomenon is hidden in the term DAMPED SINUSOID.  
>There, I just gave it away.
>
Robert,
	Given a damped wave form: at some point, the damped waveform
is to weak to cause a discharge. That leaves the previous half cycle's
charge on the object.

	jim