Hmm... All this talk of erasing things has got me thinking... If I need to
erase some tapes, do you think taking them near one of the NMR magnets here
and waving them around would do the trick?
Carlos Murillo said:
> At 11:26 PM 6/18/02 +0100, you wrote:
> >> Wouldn't switching it on and off be many times more
> >> efficient at producing a time-varying field? :-) .
> >
> >Isn't that one reason that those erasers run on AC?
> >
> >-tony
>
> It shows that I haven't been near one of them. But I did
> repair the "eraser" for magnetic strips embedded in the
> spine of all books at one of the Cornell University libraries,
> where I worked for a while. Method: charge a few big caps
> to about 340V, then discharge suddenly through a big coil.
>
> Dangerous.
>
> carlos.
>
> --------------------------------------------------------------
> Carlos E. Murillo-Sanchez carlos_murillo_at_nospammers.ieee.org
- Dan Wright
(dtwright_at_uiuc.edu)
(
http://www.uiuc.edu/~dtwright)
-] ------------------------------ [-] -------------------------------- [-
``Weave a circle round him thrice, / And close your eyes with holy dread,
For he on honeydew hath fed, / and drunk the milk of Paradise.''
Samuel Taylor Coleridge, Kubla Khan
Received on Wed Jun 19 2002 - 08:45:26 BST