18 Jun
2002
18 Jun
'02
3:23 p.m.
At 11:26 PM 6/18/02 +0100, you wrote:
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(a)nospammers.ieee.org
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