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.


> 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
> Adam Smith
> absmith-at-tiac-dot-net
> Epoch, Inc. Digital Music Project
> www.tiac-dot-net/users/absmith/                 MP3 Demo Tracks Now