Re: Damages to Electronic Equipment
First off... The walls and floors (unless made of solid metal and bonded
together.. highly unlikely) are invisible as far as the EMI problems are
concerned. So, depending on where your coil sits downstairs, the top of the
coil may only be a meter from the power cords and cables on the floor above.
Ignore the wood, carpet, gypsum board, plaster, etc.
Shielding for radiated fields (as opposed to a direct spark or arc) is only
effective if there is a closed "box" around the source (or the victim). A
flat plane would shield, if, and only if, it is much larger than a
wavelength (not likely at 100 kHz).
A screen DOES provide a safety function, in that a spark will not (usually)
penetrate it, so if you wanted to set up a show where the sparks radiate
towards an audience, you could set up a grounded screen in front of the
audience and the sparks would go to the screen, and no further. The EM
radiation, though, would flow right around the edges of the screen, and, in
fact, would likely be conducted by the surface of the screen.
From: Tesla List <tesla-at-pupman-dot-com>
To: tesla-at-pupman-dot-com <tesla-at-pupman-dot-com>
Date: Friday, February 18, 2000 12:34 PM
Subject: Re: Damages to Electronic Equipment
>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
>----- Original Message -----
>From: "Tesla List" <tesla-at-pupman-dot-com>
>To: "David Kronstein" <david_kronstein-at-telus-dot-net>
>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: