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Re: AC Resistance (formerly Spice Simulation Pictures)

Tesla List wrote:
> 
> >From lod-at-pacbell-dot-netThu Oct 31 22:39:48 1996
> Date: Tue, 31 Oct 1995 12:04:31 +0000
> From: GE Leyh <lod-at-pacbell-dot-net>
> To: tesla-at-pupman-dot-com
> Subject: Re: AC Resistance (formerly Spice Simulation Pictures)
> 
<SNIP>
> 
> Nice analysis, Bert!  I am curious as to how the streamers appear on your coil,
> do you have any pictures posted of it in operation?  Have you noticed any
> peculiarities in how the streamers grow, or move about?  Also, have you by
> chance measured the wall-plug power of your coil at a given arc length?
> 
> I have been collecting data on all types and sorts of coils, and your region of
> parameter space is still sparsely populated (ZL at Fo = 42000 Ohms).
> 
> Quantitative coilin' to ya, Bert!
> 
> -GL

Greg,

A couple of pictures of the coil in operation are on Kristian Ukkonen's
Tesla ftp site at:
   ftp://nic.funet.fi/pub/sci/electrical/tesla/pictures/hickman 

The streamers are blue-white and quite loud. They seem to pack a fair
amount of heat, and you can watch the base of the streamers wander
around the surface of the toroid due to thermal convection. Arcs to
ground are brilliant blue-white and very loud. I haven't noticed
anything out of the ordinary about the streamers themselves. I'm using
static and vacuum gaps which are firing at about 3-4 times/half cycle. I
am able to see rapid streamer growth (fraction of a second speed), but
nothing like that described for slower rep-rate and synchronously firing
coils. What kind of streamer peculiarities were you thinking about?

Power is supplied by two 15 KV 60 MA neons in parallel, with 200 uF of
power factor correction. I do have 60 Hz resonance with the tank cap,
and run with a maximum static + vacuum gap setting of about 0.54". I
measure about 25-28 amps at 120 volts under maximum input power.
Repeatable multiple-strike arc length is about 62-63" point-to-point at
full power, and "single-shot" length is about 20-21". 

I'm very interested in seeing your analysis results when they're
available!

Safe coilin' to ya, Greg!

-- Bert --