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What does a magnetic field strength of 0.418A/metre at a distance of 4.6 metres mean in real terms?

Andy Millar

I'm not even sure if there's an answer to this question but thought I'd have a go - this is the postal restriction on sending magnets, and as I'm about to try to rehome a hefty pair of loudspeaker drive units (10" / 150W) I'm wondering if they're likely to be way above, way below, or somewhere around this, I have absolutely no concept of how strong a field "0.418A/metre at a distance of 4.6 metres" is! 

Anyone got any thoughts?

Cheers,

Andy

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  • 0

    Says "5.3.26 Magnetised material with a magnetic field strength of 0.159A/metre or more at a distance of 2.1 metres from the outside of the package e.g. PA speakers."

    This www.supermagnete.de/.../Can-I-send-magnets-by-mail suggests it can be done in Germany at least. And suggests you test the package with paperclips 

  • 0 in reply to OlympusMons

    Indeed and a paperclip test which will detect perhaps the low tens of milli-Tesla on the package surface, is a far more useful, realistic and easily performed and understood test.

    Well, unless you intend to add 2m of packing all round, which will  of course have the side effect  of  making it hard to get into the average letter box.

    Mike.

  • 0 in reply to mapj1

    It doesn't state the size of paperclips MikeSlight smile

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