Re: Tesla Coil toroid Size

To: tesla-at-pupman-dot-com
Subject: Re: Tesla Coil toroid Size
From: "Malcolm Watts" <MALCOLM-at-directorate.wnp.ac.nz> (by way of Terry Fritz <terryf-at-verinet-dot-com>)
Date: Sun, 20 Sep 1998 18:03:07 -0600
Approved: terryf-at-verinet-dot-com

Hi Rob,
         Definitely agree in the aural sense. I suppose dwell is the 
better electrical term for what I was attempting to describe. 
Enjoyable post :)

Cheers,
Malcolm


> Original Poster: "Robert W. Stephens" <rwstephens-at-headwaters-dot-com> 
> 
> Tesla List wrote:
> > 
> > Original Poster: "Malcolm Watts" <MALCOLM-at-directorate.wnp.ac.nz>
> > 
> > Since I have been involved in this discussion, I will make *my*
> > definition of "bang" 200% clear: A bang starts when the gap first
> > conducts and ceases when the gap ceases to conduct. The trace on the
> > oscilloscope makes it abundantly clear that the secondary is doing
> > nothing for most of the time between bangs in a sparking coil. The
> > energy loss will not permit it.
> > 
> > Now, back to coiling...
> > Malcolm
> <snippage>
> 
> Malcolm,
> 
> It appears that your definition of 'bang' and my own differ slightly.  I
> consider the term synonymous with the acoustical event which accompanies
> a spark gap going from a non-conducting to conducting state.  I suspect
> that most of this acoustical 'bang' occurs on the sharp vertical rise of
> current through the gap and much less so after the plasma channel has
> formed and stabilized.  Hence in 'my definition of bang', assuming that
> the sound pressure wave pretty much ends ends after the sharp vertical
> leading edge of gap current conduction occurs, there can still be a
> closed primary oscillatory circuit (ionized gap) processing an
> oscillatory ringdown after the bang.
> 
> Since one purpose of this forum is to pick at the tinyest of technical
> points, I invite comments.  Any ion acoustical wave experts (if that's
> the correct term) out there?
> 
> I guess if a totally encapsulated solid state switch were employed
> instead of a spark gap, we could be talking about a 'click' size.
> Furthermore, the primary inductor definitely creates acoustical output
> from mechanical motion when clobbered by a large electrical pulse!  I've
> also 'heard' T-03 silicon transistors 'sing'.  If you ever get the
> chance to go into an AM radio station's tuning hut at the base of the
> antenna tower and they are crankin' at least 10 kW you will hear
> metallic sounding speech and music coming from the large silver plated
> copper tubing, air cored tuning coils.  It is very etherial.
> 
> Robert W. Stephens