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Re: [TCML] Skin effect



Frank,

I tried to access your bookmark and was parked at their homepage only.
How do you access the search function or go inside?

Carey

----- Original Message ----- From: "Frank" <fxrays@xxxxxxxxxx>
To: "Tesla Coil Mailing List" <tesla@xxxxxxxxxx>
Sent: Tuesday, December 16, 2008 9:42 PM
Subject: Re: [TCML] Skin effect


Hi Christopher,

You might consider looking at 1920's medical papers as well. They used spark gap Tesla and D'Arsonval machines for surgery. In some of the Fischer Diathermy manuals of that period they always suggested the Doctor practice on pieces of meat before using it on a patient! They showed photographs of the desiccation of tissue with different shaped objects.
There is a spark gap machine still widely used today called a Bovie.

There are modern machines still in use for this same purpose and if you could contact the vendors they might shed some light on the best frequencies for different applications. One such machine is called a hyfrecator and is used to remove surface growths and etc.

An on line source to view the older manuals is: http://www.electrotherapymuseum.com/

Frank


At 06:20 PM 12/16/2008 -0800, you wrote:
Hi Christopher,

I'm with Gary in that I commend you for looking at this. I also agree with Jim Lux that there are vast papers on the subject, but not all those papers are easily accessed for the general public. Most skin effect papers will deal with RF cabling and pcb engineering. But regarding human body skin depth, affects at F with X current, well, I don't know how much is actually written about (possibly several papers). It would be an interesting study. I also look forward to what you can bring to light.

Bart

Christopher Karr wrote:
Hello, everybody,

I've been reading up on the skin effect, and there's nothing that's very conclusive on it. I have seen arguments that go either way, but no actual studies. I'm in the process of testing this. If you'd like to read about my test set-up, and, possibly, donate to the cause, you may go to my website at

http://www.teslasurplus.3000farad.com/donations/donations.htm

I am in need of a microscope and capacitors, as described on the page, and I was wondering if anybody knew of a way to acquire said items. I haven't been able to find any microscopes powerful enough for under $100 to test the burning of the tissue.

I was wondering if anybody knew of any group that had tested the skin effect on biological conductors.

The theory for the skin effect is simple, but it is hard to understand exactly what forces are to blame. It's also difficult to determine what amperage is enough to cause RF burns over extended periods.
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