Re: D.C. from tesla coil

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "davep by way of Terry Fritz <twftesla-at-qwest-dot-net>" <davep-at-quik-dot-com>


> so can this be done with a sphere and a point ?


	I would expect if CAN be done.
	How well it would work, would be 'application
	dependent'.  I would expect it to NOT work, if
	an actual arc/spark passes.

	(For 'power handling' applications, be it attempts
	at HVDC or at br*adcast p*wer, it is expected
	that operation should be 'sub breakout': arcs/sparks
	while pretty, waste power...)

> cheers
> colin

> ----- Original Message -----
> From: Tesla list <tesla-at-pupman-dot-com>
> To: <tesla-at-pupman-dot-com>
> Sent: Friday, July 12, 2002 12:19 AM
> Subject: Re: D.C. from tesla coil
 
>>Original poster: "davep by way of Terry Fritz <twftesla-at-qwest-dot-net>"
> <davep-at-quik-dot-com>
 
>>>a lecture by tesla:

>>>>Another peculiarity of the rapidly alternating
>>>>discharge of the induction coil is it's radically
>>>>different behavior with respect to points and rounded
>>>>surfaces.

>>>>If a thick wire, provided with a ball at one end and
>>>>with a point at the other be attached to the positive
>>>>terminal of a static machine, practically all the
>>>>charge will be lost through the point, on accoundt of
>>>>the enormously greater tension, dependent on the
>>>>radius of curvature.  But if such a wire is attached
>>>>to one of the terminals of the induction coil, it will
>>>>be observed that with very high frequencies streams
>>>>issue from the ball almost as copiously as from the
>>>>point.
>>>end

>>Much has been learned of field ion rectifiers
>>(which is what is being discussed here...) since
>>then.

>>>He goes on to explain that the round surface disturbs
>>>the air inductively, the air molecules not
>>>necessarily coming in contact with the ball.

>>There are no 'air molecules'. tho that is a fine
>>point.

>>>>"Also, the larger the ball with a given frequency, or
>>>>the higher the frequency, the more will the ball have
>>>>advantage over the point."

>>Is he discussing rectification or ???

	best
	dwp

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