Bulk tape eraser
Jerome H. Fine
jhfinedp3k at compsys.to
Sun Apr 30 20:22:41 CDT 2017
>Chuck Guzis via cctalk wrote:
>>On 04/30/2017 07:38 AM, Mike Loewen via cctalk wrote:
>>Looking for recommendations for a bulk tape eraser for SDLT and DLT
>If it's just a small quantity to be erased, there are many Radio Shack
>videotape erasers being offered, some NIB, all for about $20. I've used
>one for years on floppies and tapes. It's not for erasing piles of
>tapes, as there's a thermal overload protector on it, limiting the
>amount of time that you can use it.
I don't know if my experience with tapes for the TK50 / TK70 applies,
what it is worth, here is what was the problem. When a tape has been
by a TK50 drive, the TK70 drive will no longer be able to write on the tape
until the tape have been BULK erased. Since I had a number of tapes written
by a TK50 and I wanted to use the tapes for producing backups using a TK70,
I obviously needed to be able to BULK erase those tapes.
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
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
BULK erase the tape such that the TK70 drive would write on the tape.
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 tapes.
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