Re: Low-powered coil definition (fwd)

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: List moderator <mod1@xxxxxxxxxx>



---------- Forwarded message ----------
Date: Tue, 12 Dec 2006 19:05:12 -0700
From: resonance <resonance@xxxxxxxxxxxx>
To: Tesla list <tesla@xxxxxxxxxx>
Subject: Re: Low-powered coil definition (fwd)



It's not so much the coil's antenna effect that creates the problem.  The 
radiation drops off rapidly and usually is not the problem.  The problem 
usually occurs in power line distribution, or "kickback" effects.

If the signal is traveling thru a buildings main ground it travels adjacent 
to both hot and neutral wires.  The ground, running RF currents thru it, 
radiates a spurious signal into space which is picked up by the nearby hot 
and neutral conductors.  They, in turn, transmit it all over the building 
and even to neighboring buildings as these RF signals can capacitively 
couple directly across transformer windings in distribution transformers.

It can be done, but one must proceed with caution and carefully check to be 
sure you are not interferring with their pleasure time.  Zapped tvs, stereo, 
and telecommunication equipment can produce a very nasty set of neighborhood 
"bad bees" which may come after your coiling work.

It's a very "grey area" in the FCC, and usually ignored for "educational 
content", but, if you stir up the local bees nest with a flagrant attitude 
towards your hobby they can and will shut you down.  The FCC has the 
authority to do it.  A former classmate of mine is an FCC engineer ---  
that's how I know.

Throw a big BBQ, invite all the neighbors and s-l-o-w-l-y introduce them to 
your hobby.  Make them think it's interesting.  Have their kids draw off 
some sparks to a ground rod with a very low power coil.

Once they think you are "weird" the damage is nearly irreversible.

Dr. Resonance



>
> ---------- Forwarded message ----------
> Date: Wed, 13 Dec 2006 08:11:41 +0800
> From: westland <westland@xxxxxx>
> To: Tesla list <tesla@xxxxxxxxxx>
> Subject: Re: Low-powered coil definition (fwd)
>
> I was wondering what to do with the RF ground as well Gary.  I'm a bit
> wary of connecting to the mains ground, because I think that would tend
> to cause some of the TC power to be pulled over to the mains circuit.
> (I was previously planning simply on connecting the RF ground to the NST
> case, and not bringing a mains ground to the NST).   Ed Phillips in an
> earlier post provided arguments that because the TC is not a
> transmitter, rather keeps most of its energy balled up around the
> secondary, that a counterpoise -- maybe a cloth under the coil, and the
> strike rail -- (with a dedicated ground if you are lucky enough to have
> one) would be sufficient -- his argument that the RF ground is the
> second plate to the toroid capacitor.  But he follows by suggesting that
> the counterpoise be grounded to the mains ground.  So I still don't know
> what to do since I'll be initially running this in my apartment (or a
> University lab if I can convince one of the EE profs to let me use one
> of theirs -- the ideal solution :-)   ).   I suppose that it depends on
> how much RF energy there is away from the coil to short into the mains
> ground.... with an antenna there is a lot floating around far away from
> the transmitter; in a TC comparatively little.
>
> I'd be interested to hear other views
>
> Chris
>
>
> Tesla list wrote:
>> Original poster: List moderator <mod1@xxxxxxxxxx>
>>
>>
>>
>> ---------- Forwarded message ----------
>> Date: Tue, 12 Dec 2006 09:02:00 -0500
>> From: "Lau, Gary" <Gary.Lau@xxxxxx>
>> To: Tesla list <tesla@xxxxxxxxxx>
>> Subject: Low-powered coil definition
>>
>> Ed Wingate - I'm surprised that you haven't chimed in here ;-)
>> When Ed runs his monster pole pig-powered magnifier (see
>> http://home1.gte.net/res07cmo/hv/wingate/wingate.htm), he routinely
>> connects the secondary base to the mains 3rd wire ground in his Tesla
>> lab, with no ill effects that I'm aware of.  So unless YOU want to tell
>> Ed that his coil is low powered, I would reject your definition.
>> Granted, his lab is a structure separate from his house, and I wouldn't
>> dream of doing the same in my house with a coil powered by anything that
>> I wouldn't want dropped on my foot.
>>
>> Gary's "low powered coil" definition:  If you can deliberately drop the
>> transformer on your foot, it is "low powered".
>>
>> But in all seriousness, this is one area of coiling that is seriously
>> lacking any real data.  No one has EVER scoped or measured just what it
>> is that we suspect and fear would be contaminating our power lines.  I
>> think most of us have some opinion on this, but no one can defend it
>> beyond "this is what I do and I've not destroyed anything".
>>
>> Regards, Gary Lau
>> MA, USA
>>
>>
>>> Date: Tue, 12 Dec 2006 00:05:54 EST
>>> From: Mddeming@xxxxxxx
>>> To: tesla@xxxxxxxxxx
>>> Subject: Re: Can anyone diagnose problems with our coil? (fwd)
>>>
>>> While the definition of a low-powered coil is iffy, a low powered
>>>
>> coil
>>
>>> can be safely connected to the mains ground.
>>>
>>> Regards, Gary Lau
>>> MA, USA
>>>
>>>
>>>
>>>
>>> Hi Gary, All,
>>>
>>> How about this as an operational definition of a low power TC?
>>>
>>> A low power TC is any one which, when grounded to the power mains
>>>
>> ground
>>
>>> connection, does NOT blow out other electrical devices in your house,
>>>
>> neighbor's
>>
>>> house, school, neighborhood, etc.
>>>
>>> Matt D.
>>>
>>
>>
>>
>>
>
>
> -- 
> ____________________________________________________
>
> J. Christopher Westland, PhD CPA
> Professor, ISMT, University of Science & Technology, HK Clearwater 
> Bay,Kowloon, Hong Kong
> Tel: 852 2358 7643
> Fax: 852 2358 2421
> Mob: 852 9528 1745
> URL: ihome.ust.hk/~westland
> Mobile e-mail: chris.westland@xxxxxxxxxxxx
>
>
>
>
>