Re: [TCML] Tesla coil threat to pacemakers

["Carl" <cn8@xxxxxxx>]

15 kV/m is an electric field of 15,000 volts per meter.  If you are outside 
in a strong thunderstorm, the electric field due to charges in the cloud can 
get as high as 15 kV/m or even higher.  If the field is this high, lightning 
may be imminent.  If you have a Tesla coil generating 500,000 volts, the 
field in its immediate vicinity could be 250,000 V/m.  Walking across a 
carpet on a winter day can generate fields in the vicinity of 1 kV/m or 
1,000 V/m.
---Carl




-----Original Message----- 
From: Jim
Sent: Monday, April 21, 2014 3:31 AM
To: Tesla Coil Mailing List
Subject: Re: [TCML] Tesla coil threat to pacemakers

Please define 15kv/m ?

On 4/20/2014 10:22 PM, Carl wrote:
> 15 V/m and 3 V/m are tiny electric fields.  Walk outside and you are
> in about 100 V/m due to the charge on the ionosphere.  Are you sure
> you haven't dropped a k?  Even 15 kV/m at that distance seems low.
>
> ---Carl
>
>
>
>
> -----Original Message----- From: Adam Munich
> Sent: Sunday, April 20, 2014 6:17 PM
> To: Tesla Coil Mailing List
> Subject: Re: [TCML] Tesla coil threat to pacemakers
>
> Bturner,
>
> For what it's worth, I have measured e-field strengths of up to 15V/m
> about 2 meters from my DRSSTC. I would advise caution.
>
> Regards,
> -Adam
>
> On Sun, Apr 20, 2014 at 8:31 PM, Jim <electrical@xxxxxxxxxxxx> wrote:
> > I worry about my classic coil all of the time. A friend recommends
> > putting
> > the static spark gap only in a faraday cage (like metal screening). He
> > believes the spark gap is the only culprit.
> >
> >
> > On 4/20/2014 3:02 PM, Kuba Anglin wrote:
> > > Hey,
> > >
> > > I recently finished my first Tesla coil and am very impressed by its
> > > performance. After a couple minutes of tuning, I was looking at 3-4
> > > foot
> > > streamers. There have been no problems with the coil so far except
> > > for the
> > > over-coupling issue, which I solved.
> > >
> > > The Tesla coil is now no secret to my immediate or extended family,
> > > and I
> > > have many requests for demonstrations. Especially from my
> > > grandmother who
> > > is very impressed with me and my brother's work (I worked on this
> > > project
> > > with my twin brother). However, she has a pacemaker, and I have
> > > explained
> > > to her that the inductance field produced by the Tesla coil will damage
> > > any
> > > nearby electronics including pacemakers. I did some reading and for my
> > > Tesla coil, 20 feet is a safe distance. Interestingly, I had my
> > > phone in
> > > my
> > > pocket (samsung s4) during my first few runs and it works perfectly
> > > even
> > > though it had been within fluorescent tube igniting range for at
> > > least 20
> > > seconds.
> > >
> > > Before I built my Tesla coil, I had nearly 4 months of research
> > > behind me.
> > > I made sure I had a very good understanding of every component and
> > > its use
> > > before I bought one piece. I have never taken a physics class as I am
> > > currently a 16 year old high school sophomore taking AP chemistry,
> > > but I
> > > feel as though I may not need to at this point (don't worry, I will
> > > take
> > > physics next year and AP physics the year after as I have heard that
> > > the
> > > curricula are different). That said, I have done extensive research
> > > on all
> > > aspects of how and why a Tesla coil works.
> > >
> > > The only problem is that anyone who sees the Tesla coil makes
> > > assumptions.
> > > The ignorance I have experienced from others has become infuriating.
> > > This
> > > is why I would finally like to settle this.
> > >
> > > *What is a safe distance to stand from my Tesla coil if the person in
> > > subject has a pacemaker?* Please include your education and/or
> > > experience.
> > > Any other unrelated comment or questions are also welcome. I have all
> > > information regarding my Tesla coil below:
> > >
> > > *Video:*
> > >
> > > https://www.youtube.com/watch?v=Y1jNe0FIZ8g&feature=youtu.be
> > >
> > > *Image:*
> > >
> > > http://s30.postimg.org/9d1txzls1/Tesla_Pic.jpg
> > >
> > > *Parts:*
> > >
> > > 12KV 60mA Transformer (input 120V 60Hz)
> > >
> > > 28 (14X2) .15uF 2KV Capacitors
> > >
> > > 28 Resistors
> > >
> > > Tungsten Spark Gap
> > >
> > > Brass Safety Gap
> > >
> > > 1/4" 11 Turns Copper Primary
> > >
> > > 1/2" Strike Rail
> > >
> > > 4" PVC Pipe 2' Secondary 26 AWG Magnet Wire 1200 Turns
> > >
> > > 13"X4" Aluminum Spun Toroid
> > >
> > >
> > > Thank You,
> > >
> > > Kuba Anglin
> > > _______________________________________________
> > > Tesla mailing list
> > > Tesla@xxxxxxxxxx
> > > http://www.pupman.com/mailman/listinfo/tesla
> >
> > --
> >
> > _______________________________________________
> > Tesla mailing list
> > Tesla@xxxxxxxxxx
> > http://www.pupman.com/mailman/listinfo/tesla

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