Re: [TCML] Re: Dummy load for optimum cap size Experimentation

[Gary Lau <glau1024@xxxxxxxxx>]

I have extended my dummy-load testing to include 15/30 NST's as well as
15/60's.  The updated test report may be found at http://drop.io/garylau as
"Dummy Load Experiment.pdf"

There were no startling revelations aside from the fact that all similarly
rated NST's are not at all equivalent, in terms of how much power may be
extracted from them.  I continued to see two capacitive sweet-spots in terms
of how much power is processed, in many but not all test configurations.  I
did not see a clear-cut indication that LTR cap values results in a higher
power throughput over mains-resonant values, although this is sometimes
voltage-dependent.

Regards, Gary Lau
MA, USA

On Fri, Oct 8, 2010 at 9:25 PM, Gary Lau <glau1024@xxxxxxxxx> wrote:

> All,
>
> I'm pleased to have completed my experiment,to determine the optimum
> capacitor value for a Tesla coil using a static gap, by monitoring the
> output of a halogen lamp dummy load in place of the primary coil.  I had
> originally planned to do this for both 15/60 and 15/30 NST, but due to time
> constraints, I just did it for three different 15/60's.  Maybe later...
>
> When I started the experiment, I was certain that I would find that the
> table used to choose cap values based on NST specs wasn't right, since it
> was generated (I think?) using just simulation results.  But it turns out
> that it's pretty close, at least for a 15/60.
>
> Other finding were that using a Variac to boost the NST primary voltage
> above 120VAC results in a huge boost to power throughput.
>
> Also, the power throughput when using a static gap, is far more chaotic
> than I had ever imagined.  It's not enough to try to average things over a
> few seconds, 20 seconds, or even a minute.  Even after averaging for two
> minutes, there are still variations.  I think this may explain why coils
> sometimes deliver the occasional exceptionally long spark, but it's not
> repeatable.
>
> I have generated a comprehensive report, about a megabyte download.  Please
> look in http://drop.io/garylau for Dummy Load Experiment.pdf  It's a good
> read.
>
> To those who loaded me equipment, I thank you again.
>
>
> Regards, Gary Lau
> MA, USA
>
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