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130kW Coil Stuff


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From:  D.C. Cox [SMTP:DR.RESONANCE-at-next-wave-dot-net]
Sent:  Thursday, March 19, 1998 1:44 AM
To:  Tesla List
Subject:  Re: 130kW Coil Stuff

to: Greg

At a distance of 3-4 feet from the base of your coil try some sharp sewing
machine needles -- they should attract the distance and help prevent it
from striking your coil base.  4-5 needles arranged symetrically around the
base on some simple bamboo or plastic fishing poles which allow you to
raise to what ever height you might need to offer protection will probably
stop the damaging strikes -- a simple idea but it will work to protect your
investment.

Hope to make it up there on Friday to see the fireworks -- please don't
burn it up until after Friday.

DR.RESONANCE-at-next-wave-dot-net


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> From: Tesla List <tesla-at-pupman-dot-com>
> To: 'Tesla List' <tesla-at-pupman-dot-com>
> Subject: 130kW Coil Stuff
> Date: Wednesday, March 18, 1998 8:45 PM
> 
> 
> ----------
> From:  Greg Leyh [SMTP:lod-at-pacbell-dot-net]
> Sent:  Wednesday, March 18, 1998 3:37 AM
> To:  Tesla List
> Subject:  130kW Coil Stuff
> 
> Hi All, 
> 
> A few interesting observations so far:
> 
> The coil is now consuming about 120kW (+/-5%) at the 
> full power setting, with several unexpected results. 
> At this power level, the arcs occasionally follow a 
> curved trajectory from the very top of the sphere, and 
> hit the base of the the secondary tower. I was hoping
> that the spherical electrode geometry would keep the
> arcs sky-bound, but around 80kW or so they start heading
> downward.  The coil may have to be turned down slightly,
> in order to avoid extended cosmetic damage.  The _lineal_ 
> distance of these semi-circular arcs is about 35-40 feet. 
> 
> Also, as the power level is increased the arc length 
> appears to reach a maximum limit (around 70kW), and 
> beyond that the outer 40% or so of the arc length starts 
> to develop a greater number of branches instead, filling 
> a larger _volume_ with streamers, rather than increasing 
> the actual arc length as predicted.  
> 
> The ion lifetimes in the streamer channels also appear to 
> be _much_ longer for this coil than on the old 40kW unit, 
> as the arc length stays at nearly full length down as far 
> as 110BPS, but with much less branching.
> 
> The coil appears to be in good shape for the Wednesday 
> evening tests, when I will be measuring current waveforms 
> from coil-to-electrode and electrode-to-arc.  I will post
> JPEG's of the results as time permits.
> 
> 
> -GL
>