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Re: Damages to Electronic Equipment



----------
> From: Tesla List <tesla-at-pupman-dot-com>
> To: tesla-at-pupman-dot-com
> Subject: Re: Damages to Electronic Equipment
> Date: Monday, February 14, 2000 11:52 PM
> 
> Original Poster: "David Kronstein" <david_kronstein-at-telus-dot-net> 
> 
> The tesla coil and the computers are _not_ in the same room.
> The computers are all upstairs, and the tesla coil is in the
> basement, in the room _under_ the computer.
> 
> Most of the network cables are run on the outside of the house.
> The computers are in different rooms around the upstairs of the house.
> I could unplug the network cables when I'm going to run the coil.


> 
> 
> Can you tell me why covering the ceiling with a grounded mesh
> wouldn't help?

It "might" help, but, in general, the wavelength of the TC emissions (100's
of meters) is so much longer than the outer dimensions of the mesh (or
solid metal, it doesn't really matter), that the energy would flow right
around it.  You would get some help from the fact that the mesh would make
the field more uniform in its vicinity, but it certainly wouldn't do much
shielding.

The mesh also might make things worse by acting as a capacitor plate or
antenna.

> 
> 
> Thanks
> 
> ----- Original Message -----
> From: "Tesla List" <tesla-at-pupman-dot-com>
> To: "David Kronstein" <david_kronstein-at-telus-dot-net>
> Cc: <tesla-at-pupman-dot-com>
> Sent: Sunday, February 13, 2000 2:39 PM
> Subject: Re: Damages to Electronic Equipment
> 
> > Original Poster: Terry Fritz <twftesla-at-uswest-dot-net>
> >
> > Hi David,
> >
> > At 12:02 PM 02/11/2000 -0800, you wrote:
> > >    Hello
> > >
> > >I have a _very_ expensive computer in the room above where I am
> > >going to run my tesla coil.
> >
> > This is NOT good!!!
> >
> > >
> > >I haven't run it yet because i'm afraid it might damage it.
> >
> > That IS good!!!
> >
> > >
> > >The computer is connected to a network, phone and cable TV
> >
> > All will act as strike rails or conductive RF ground paths that could
> allow
> > say 20 amps of RF to flow through those circuits.  That would lead to
> total
> > destruction...
> >
> > >
> > >Could the network act as an antena and pick up interference?
> > >There are three computers on the network.
> > >
> > >Could this damage anything?
> >
> > If you had a really bad day you could totally destroy every bit of
it!!!
> > The phone and network wires could easily pick up destructive currents
many
> > orders of magnitude higher than is needed to destroy the computer
> circuits.
> >
> > Tesla coils produce hundreds of thousands of volts, extreme magnetic
> > fields, extreme electrostatic fields, extreme current fields.  All
which
> > could destroy a nearby computer with ease.  The voltage will easily fry
> > that 5 volt and 3.3 volt microprocessor buss stuff.  The magnetic
fields
> > could induce equally destructive voltages on long wires or traces on
the
> PC
> > boards.  The electrostatic fields will raise powerful static voltage
> > charges on everything.
> >
> > >
> > >The coil is powerd by a single 15KV 60mA nst.
> >
> > Easily powerful enough to do the damage described above.
> >
> > >
> > >Would covering the ceiling with some sort of grounded mesh be
> > >enough to protect it?
> >
> > Hardy,
> >
> > I would strongly suggest two options.  Move the coil somewhere else far
> > away so it does not use any of the same AC wiring as your computer
stuff.
> > Or, move all your computer stuff equally far away.  The coil must not
be
> > allowed to strike phone lines, cable TV, network lines, or anything
else
> > but lengths of wire connected directly to ground rods.
> >
> > I would say running a 900Watt Tesla coil in a room with three networked
> > computers would almost guarantee extraordinary damage to them.
> >
> > I'll copy you on this directly incase you are just about to....
> >
> > Cheers,
> >
> > Terry
> >
> > >
> > >Thanks
> > >
> >
> 
> 
>