Re: [TCML] Is my 10" Tesla Coil Illegal ?

[johnbrooks@xxxxxxxxxxx]

Is it just me,or did we have this same exact discussion 5-6 years ago?
Moderators?
Regards
Joe in Texas

On Thu, 21 Jan 2010 14:47 -0600, "Steve Ward" <steve.ward@xxxxxxxxx>
wrote:
> Are you aware of something called "conducted emissions"?
> 
> Im all for giving advice and ideas, but this advice seems rather un-sound
> and purely guess work (any of my experience with RFI doesnt completely
> agree
> with your "solution").  Im also not convinced you need the coil to arc to
> the faraday cage for it to be effective.
> 
> >From the solid state systems i work with, the biggest producer of EMI is
> when the coil arcs to something (grounded or just large).  This produces
> bursts of 5-10MHz noise on my large system, comparable in size to Gary's
> 10"
> coil.  I often use my laptop computer (powered from the same circuit, no
> less) about 25 feet away from our twin system that produces up to 20 foot
> discharges.  SS is obviously a lot less EMI, since i dont use anything in
> particular for a line filter (though i really should).  Anyway, just
> wanted
> to point out that all of our EMI related issues have always been from the
> coils sparking to stuff, usually there are zero problems until that
> happens
> (and usually its not a problem anyway).
> 
> A full faraday cage and careful line filtering would be the best ways of
> chopping away at the EMI.  Line filtering is pretty trivial
> (mechanically)
> and has the potential to help considerably.
> 
> Steve
> 
> On Thu, Jan 21, 2010 at 1:40 AM, Christopher Karr
> <chriskarr4@xxxxxxxxxxx>wrote:
> 
> >
> > While it's likely that a Faraday cage would work, it would be expensive to
> > build and a terrible inconvenience to have one in your own back yard, which
> > you would want to eventually mow.
> >
> > A much more simple solution is to make sure that the spark gap, primary
> > coil and secondary breakout are all shielded from RFI. The metho of doing
> > this is taking the tank components and surrounding them with a conductive
> > case or mesh, then earth-grounding said mesh. For the secondary, one would
> > need a method of guaranteeing a 'power-arc' 100% of the time, which isn't
> > very fun to see..
> >
> >  - Christopher
> >
> > > Subject: RE: [TCML] Is my 10" Tesla Coil Illegal ?
> > > Date: Tue, 19 Jan 2010 12:07:39 -0800
> > > From: Shannon.L.Weinhold@xxxxxxxxxxxxxxx
> > > To: tesla@xxxxxxxxxx
> > >
> > > Perhaps a large faraday cage is your solution.
> > >
> > > -----Original Message-----
> > > From: gary350@xxxxxxxxxxxxx [mailto:gary350@xxxxxxxxxxxxx]
> > > Sent: Tuesday, January 19, 2010 9:57 AM
> > > To: Tesla Coil Mailing List
> > > Subject: [TCML] Is my 10" Tesla Coil Illegal ?
> > >
> > > This time of the year when the air is cold and the humidity is extremely
> > > low static electricity is very high I get shocked every time I get IN or
> > > OUT of my SUV, take off my jacket or put on my jacket.  If I move the
> > > blankets in bed at night I see all kinds of sparks.  It is perfect for
> > > firing up my Tesla Coil and getting some very long sparks.   But I worry
> > > that this might be illegal.  My 10" TC makes 12 foot arcs I can make a
> > > 27 ft circle of arcs and sparks in the back yard with the 3 ft top load.
> > > It makes every motion detector light and every security alarm system go
> > > off in a 4 block radius around my house.  After dark I can see motion
> > > detectors lights going on/off, on/off, on/off, on/off, on/off, in all
> > > directions as far as I can see.  My automatic garage door and all the
> > > neighbors garage doors are freaked out going up/down, up/down, up/down,
> > > up/down, up/down, up/down, over and over.  I can hear security alarms in
> > > all directions.  I road my bicycle through the neighbor hood and I can
> > > find alarm systems going off 4 blocks away in several directions from my
> > > house.  It totally distroys TV and it makes no difference if you have
> > > cable, satallite, or antenna TV is totally wiped out all reception for
> > > several blocks.  I don't fire up my 10" TC very often anymore I worry it
> > > might be illegal.
> > >
> > >
> > >
> > >
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> >
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