piclist 2001\02\23\095733a >
Thread: VHS tape, a way to erase it.
face BY : David VanHorn email (remove spam text)

>Based on some rough calculations I'd say that a 5cm^2 degausser coil front
>that will wipe VHS and data tapes at essentially zero distance should
>require about 300W mains power input. Maybe more. The calculations are
>based on the required power to do that in a normal erase head and its
>power input. The numbers may be wildly off however as they assume that
>the efficiency of both systems are the same, and they are not.

You'll need about 700 gauss IIRC.

700 turns at 1A would get you there. Wind a solenoid big enough to put the
tape in, with about an inch of extra on the ends.  The flux through the
center of a solenoid is uniform until you put the tape in, but that's ok,
because the flux going through the tape is what you want.

Watch that collapsing field though :)

Dave's Engineering Page: http://www.dvanhorn.org
Where's dave? http://www.findu.com/cgi-bin/find.cgi?kc6ete-9

http://www.piclist.com hint: The PICList is archived three different
ways.  See http://www.piclist.com/#archives for details.


In reply to: <Pine.LNX.4.10.10102231155330.2224-100000@plp.plp.home.org>
See also: www.piclist.com/techref/index.htm?key=vhs+tape+way+erase
Reply You must be a member of the piclist mailing list (not only a www.piclist.com member) to post to the piclist. This form requires JavaScript and a browser/email client that can handle form mailto: posts.
Subject (change) VHS tape, a way to erase it.

month overview.

new search...