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Re: And what of the FCC? (fwd)
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To: tesla@pupman.com
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Subject: Re: And what of the FCC? (fwd)
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From: Tesla List <mod1@pupman.com>
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Date: Sun, 28 Sep 1997 14:19:47 -0600 (MDT)
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Approved: mod1@poodle.pupman.com
---------- Forwarded message ----------
Date: Mon, 29 Sep 1997 07:48:58 +1200
From: Malcolm Watts <MALCOLM@directorate.wnp.ac.nz>
To: tesla@pupman.com
Subject: Re: And what of the FCC?
I also have done radiation checks on running coils.....
> From: Greg Leyh <lod@pacbell.net>
> To: Tesla List <tesla@pupman.com>
> Subject: Re: And what of the FCC?
>
> Julian Green wrote:
>
>
> > My first coil resonated at 220KHz which is on the LW band of a domestic radio.
> >
> > I did a walk test and at close range (20 meters) I could tune into the coil.
> > At 150 meters - zippo.
>
> Given R. Hull's and your experiences with measuring RFI,
> it would seem that the radiation from a tesla coil is
> almost entirely 'near-field', as opposed to the radiated
> field from a quarter-wave antenna.
>
> There is some hope then for future coils, if the RFI can
> be counted on to die away within 100 coil lengths distant
> from the TC.
A well tuned coil loaded by spark and with a good ground radiates
very little. Remove any of the above three items and you can guarantee
you are causing someone a problem.
Malcolm