Re: Duncan Cadd on Tesla Coils

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: westland <westland@xxxxxx>

I realize that ... but his point is that there is a charge 'conveyer' 
mechanism in both devices, that pushes charge up the column at 
dq/dt  (a rate that is much faster with a damped intermittent 
resonant tesla 'conveyer') and that both use a column that 
essentially keeps the charge on the top load with what are in effect 
equipotential rings.  ...


Tesla list wrote:
> Original poster: Ed Phillips <evp@xxxxxxxxxxx>
>
> Yeah, the shooter pic is a bit over the top ... particularly the 
> graininess; I kind of expect a ransom note with it.
> Why don't you buy his idea that resonance plays the role of the VdG 
> belt, and is what transports the tesla coil's charge up to the topload?
> Just curious, since the total voltage up there is proportional to 
> the square root of the ration of the secondary capacitance to the 
> primary capacitance, his explanation is an attractive fit with the 
> specs of a VdG generator.
>
> Chris"
>
>    The Van de Graaf generator is a DC device in which charge is 
> attached to the belt at the ground end and transported MECHANICALLY 
> to the HV terminal where it is collected.  Almost exactly analogous 
> to a bucket pump.  Steady state device and output is DC.
>    The TC is a resonant AC transformer and the principle of 
> operation is totally different.  The charge from the primary 
> capacitor is discharged through its inductance to form an 
> oscillating magnetic field which excites the secondary through 
> mutual inductance.
>
> Ed


--
____________________________________________________

J. Christopher Westland, PhD CPA
Professor, ISMT, University of Science & Technology, HK Clearwater 
Bay,Kowloon, Hong Kong
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