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Re: Weird ideas [humidity gauges]
From: D.C. Cox[SMTP:DR.RESONANCE-at-next-wave-dot-net]
Sent: Sunday, December 07, 1997 2:36 AM
To: Tesla List
Subject: Re: Weird ideas
to: Tesla List
A few months ago Fair Radio Sales, Lima, OH, had some nice 6 inch dia.
humidity gauges for about $10. We added one to the lab wall about 3 years
ago and it works great -- use it more for checking performance on Van de
Graaffs than on TC's, but you can always check the RH in your lab and the
cost if reasonable.
DR.RESONANCE-at-next-wave-dot-net
> From: Adam[SMTP:absmith-at-tiac-dot-net]
> Sent: Friday, December 05, 1997 8:19 AM
> To: Tesla List
> Subject: Re: Weird ideas
>
>
> >From: Mark S Graalman[SMTP:wb8jkr-at-juno-dot-com]
>
> > Actually, IMHO there *really* is no such thing as
> >efficiency in a machine that draws power yet does
> >no actual work or provides no tangible benefits.
> > It really is work/fun input, fun output.
>
> Not true. Tesla coils draw a certain amount of power in, and discharge a
> certain amount of power out. However, the power output is not easily
> measured, so true electrical efficiency is not usually known.
>
> The real figure of merit for a Tesla coil is spark length vs. wallplug
> input power. In order to be a true gauge of performance, we would have
> to standardize the atmospheric conditions, but since this is not often
> controllable, we ignore it or comment vaguely about the humidity, etc...
> Also, spark length is measured point to point, alone a straight line, not
> along the actual path of the arc, which is quasi-fractal in nature, much
> like a coastline.
>
> It should also be noted that spark length vs. wallplug power is also
> frequency dependant, and higher frequency coils seem to have better
> ratios.
>
> -Adam
>
>
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