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Re: WAS Curtain Control NOW B&Q and Screwfix


  • To: ukha_d@xxxxxxx
  • Subject: Re: WAS Curtain Control NOW B&Q and Screwfix
  • From: "Paul Gordon" <paul_gordon@xxxxxxx>
  • Date: Sat, 03 Mar 2001 15:41:49 -0000
  • Delivered-to: rich@xxxxxxx
  • Delivered-to: mailing list ukha_d@xxxxxxx
  • Mailing-list: list ukha_d@xxxxxxx; contact ukha_d-owner@xxxxxxx
  • Reply-to: ukha_d@xxxxxxx

I can certainly vouch for the strength of hard disk drive magnets - I use
about half a dozen or so of them as fridge magnets, and SWMBO cannot pull
them off the fridge door!! - she can just about manage to slide them to the
edge of the door and scrape them off the edge of the fridge, but pulling
them directly off, - forget it!

Even worse is when you get two of these beauties close enough to each other
to "leap together" - you >really< don't want to get your
finger in the way!!
(I speak from experience!)

I pulled apart about 3 really old 127MB IDE drives to get these, - I got
two
magnets from each drive.

Paul G.


>
>The trick is getting a suitably strong magnet, which is where Hard
Drives
>come in!!
>
>the magnet which is part of the drive head mechanism is hideously
strong
>(the stronger the magnet, the less current is needed to move the heads
> >really< fast across the platter, so designers use magnets as
strong as
>they
>possibly can, without causing data retention issues for the media
surface)
>
>The magnet from a Seagate 10Gb drive (which died in a spectacular way)
>which
>I use can lift a teaspoon off of the kitchen table from about 10-12cm
away.

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