Bulk tape eraser
cclist at sydex.com
Sun Apr 30 21:06:49 CDT 2017
On 04/30/2017 06:22 PM, Jerome H. Fine via cctalk wrote:
>> Chuck Guzis via cctalk wrote:
> FORTUNATELY, I had an old voice coil fram a speaker available. It
> must have been a large speaker because the coil was a cylinder about
> 3" in diameter and about 3" long. The permanent magnet seems to have
> a few pounds of pull on any iron object, so I thought it might be
> useful. It probably takes about 30 seconds of slowly rotating the
> voice coil over the surface of the TK50 / TK70 tape to sufficiently
> BULK erase the tape such that the TK70 drive would write on the tape.
> Since I believe that the TK50 / TK70 tapes are early DLT tapes, this
> method may also be successful, if a bit slow, for a small quantity of
I've entertained the idea of pulling out one of my old microwave oven
transformers, cutting off the "I" sections, so that it's only "E"
laminations, and then removing the high-voltage outer windings (easy
enough to do with a Dremel--some folks re-purpose these boat anchors to
serve as the basis for spot welders and such.
Carefully limiting the current with a large incandescent lamp, that
should give one a whopping AC field that should take the magnetization
out of anything.
But...it feels like too much work for an old man.
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