130kW Coil Stuff

• To: "'Tesla List'" <tesla-at-pupman-dot-com>
• Subject: 130kW Coil Stuff
• From: Tesla List <tesla-at-stic-dot-net>
• Date: Wed, 18 Mar 1998 21:45:40 -0600
• Approved: tesla-at-stic-dot-net

----------
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

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