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Covering arcade machines with tolex

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quarterback:
Magnetic Shielding


--- Quote ---Monitor Shield

 If one of the problems you are trying to deal with in an NMR facility is the distortion of televisions and computer monitors, then a much more cost effective way to deal with this issue than shielding the entire magnet room is to build a shielding box for the monitor. This can be a sheet metal box with five sides where the front of the monitor faces the open side of the box. Low cost steel plates can be bolted to angle iron and painted to construct the box (keep such a box from getting so close to the magnet that it gets pulled in). Keep at least one inch of space between the box and the monitor for ventilation. With some larger monitors a small ventilation fan is required to keep the monitor cool enough for operation. Boxes such as these are amazingly effective at keeping monitors working without distortion.
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Monitor Shielding and Background


--- Quote ---The interference between monitors is caused by low frequency magnetic fields generated by the yoke coils that surround the neck of the tube. These scan the electron beam horizontally and vertically across the phosphor-coated screen. These fields are best shielded by iron or steel and the more of it the better.  Try putting a thick piece of steel between the monitors. Certain steels are specially designed for magnetic shielding, and they require considerably less steel than other alloys. (Stainless steel is about the worst!)

Magnetic shielding affects both the radiated magnetic fields (a feature often mentioned in the monitor specifications) and also the susceptibility of the monitor to magnetic fields
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Shape D.:
First I question this guys paranoia when reading this.

"A SafeGuard Apron worn on the body will block the electric fields very nicely. Another option is to wear a shielded shirt. Shielded Gloves can be used to protect the hands." 

Hes talking about a laptop, not  uranium, or something else that I could at least see being concerned about.

And secondly you are correct about the copper sheilding, for some reason my brain switched to thinking about RF interference.

but surrounding a monitor by a "magnetic piece of metal" is still a bad idea as far as your monitor is concerned.

quarterback:

--- Quote from: Shape D. on December 10, 2004, 06:20:03 pm ---First I question this guys paranoia when reading this.

"A SafeGuard Apron worn on the body will block the electric fields very nicely. Another option is to wear a shielded shirt. Shielded Gloves can be used to protect the hands."
--- End quote ---

DrewKaree:

--- Quote from: Brocken on December 10, 2004, 01:51:16 pm ---Tolex is an automotive upholsterer (I think) :p

I actually like the idea of using velcro :D or sheet metal that was magnetic so you could stick fridge magnets to it etc

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I personally think you guys are all nuts.

But on a side note, now that you've brought it up - where can I get some of that SHEET METAL] that is NON magnetic?

Brocken:
aluminium?

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