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Re: [TCML] More fun with wireless power

Lets not get crazy here. Its been known for a long time that the power attenuates according to 1/(R**2) for far-field reception and 1/(R**3) for near-field reception and I believe that this video confirms that. I love a good demo as much as anyone even when it demonstrates no real practical value. To his credit Greg hasn't promoted this demo as anything more than a lab curiosity that is only practical for very short ranges (10s of feet). Its still very inefficient with kilowatts transmitted and tens of watts received even over these very short range lab demos, at least according to my eyeball analysis. He isn't saying that this can be applied to wide-area long range wireless power ala Tesla's 120-year old scheme, at least I hope not. That is my only problem with these short-range wireless power demos. Many viewers who are perhaps not trained in electrical engineering concepts will extrapolate this immediately to Tesla's world-wide wireless power and the conspiracy theories get started up all over again.

Steve White
Cedar Rapids, Iowa

----- Original Message -----
From: "Liberty Rising" <garretsontech@xxxxxxxxx>
To: "Tesla Coil Mailing List" <tesla@xxxxxxxxxx>
Sent: Saturday, August 1, 2020 8:20:25 PM
Subject: Re: [TCML] More fun with wireless power

I love it. Fantastic demonstration. But I hope that you are working to
determine, refine and publish the overall efficiency of such an
application. I like to show off to my friends the fact that my TC can
brightly illuminate a 48" fluorescent tube at 10' from the source. But in
order to do that I am pulling 12 amps at 140 volts for the primary input.
Its an incredible waste of energy to say the least. That being said, I am
merely a hobbyist. I have zero formal training on the matter other than
having a HAM license. I would really like to see the numbers regarding
power output from the transmitting coil compared to the actual work being
done in HP or some other quantifiable measurement by the receiving device.

My two cents

 - Brandon Garretson

On Sat, Aug 1, 2020 at 8:56 PM jimlux <jimlux@xxxxxxxxxxxxx> wrote:

> On 8/1/20 3:36 PM, David Thomson wrote:
> > Is there any doubt that if someone had attempted to discuss this project
> on
> > this list before building the working model that they would have been
> > moderated into silence?
> Not at all - this would be a perfectly appropriate topic - where it
> would get the side-eye from the moderators if you started to talk about
> "powering the entire country" kinds of things.
> If you want to discuss power transmission using tesla coils in a
> physics/engineering practical sense - how much power into your
> transmitter, what voltages are practical, how would you build a
> receiver, and those sorts of questions, I don't have a problem with it.
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