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Thread: Magnetic Shielding

  1. #1
    Constant Bitrate captain_jim1's Avatar
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    Magnetic Shielding

    What can I use to shield my laptop from the large speakers I have so damn close to it?

    If I move the hard drive to a location out of the way, do I have to worry about anything else on the motherboard (cmos, etc) that might have problems with a big magnet?

    This is a long shot -- but would that electo-magnetic shielding stuff hardware comes in shield anything?

    Thanks
    -Brad
    83 mp320i

    PS. I can't move the laptop or the speaker so please don't suggest that.

  2. #2
    Constant Bitrate
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    just get a sheet of steel or copper. Around 1/8 inch should be plenty. But really how close are they? Even easier get a one of the sides off a crappy old computer case. That is what they are made for. Just make sure is isn aluminum.
    Magnetic interference could be bad for a lot of other components if the magnet was in direct contact, but the hdd is the most sensitive to it. Can't you move the whole laptop so that it is at least 5-6 inches away from the speaker magnets? If you are within an inch or two I would expect problems soon, put a big heavy plate of steel if you are that close.

  3. #3
    Newbie
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    No no no no NO!

    Copper is not a magnetic metal, and therefore cannot be used as a magnetic shield. Any magnetic energy will pass straight through copper.

    Simply placing a piece of steel or other magentic metal between the magentic source and what you're trying to protect could simply make things worse. Done incorrectly, the piece of steel could act to draw more of the magnetic energy towards what you're trying to protect.

    And computer cases are not made of metal for reasons of magentic shielding. Metal cases are used for RF shielding, which is completely different.

    Google search on magentic shielding. You should be able to find products that can shield a laptop. Search the newsgroups for some good info.

  4. #4
    Constant Bitrate captain_jim1's Avatar
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    I am thinking lead will block it pretty well .. but I don't know if I want a big old lead block in my car ... might improve handling some .. haha..

    -Brad
    83 mp320i 284k
    -Brad
    83 mp320i
    99 mp323i
    _________

    7" Lilliput w/Touch, 150 W Opus, 2.4ghz P4 533fsb, 512 DDR 333mhz, GPS, WiFi Inet, 40g Maxtor 7200rpm, Laptop DVD/CD-RW w/USB2.0 Bridge, WinXP Pro.

  5. #5
    FLAC Skraggy_uk's Avatar
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    Originally posted by captain_jim1
    I am thinking lead will block it pretty well .. but I don't know if I want a big old lead block in my car ... might improve handling some .. haha..

    -Brad
    83 mp320i 284k
    You could try Lead flashing tape from a DIY centre, and wrap it round the hard drive as a shield.
    4x4 in a turbo stylee.

  6. #6
    Newbie
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    Lead will not work. It is not a magnetic metal.

    Your basic choices are Iron, Nickel, and Cobalt. And alloys (e.g. steel) based on these metals.

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