Douglas Meade wrote:
> 
> Stan,
> 
> >   IIRC, the controllers for the TK-50 and TK-70 are different. Another
> > glitch may be trying to use a TK-50 tape instead of a TK-70. Apparently,
> > the timing track is written the first time a new (blank0 tape is written
> > to, and the timing tracks are different between the TK-50 and the TK-70.
> > Comments have been made about media differences, although I've
> > demagentized a TK-50 tape (with $1.00's worth of magnets!) and written
> > to it in a TK-70 drive. This is "officially" frowned upon, and I'm not
> > counting on that tape for a backup....YMMV.....
> 
> Could you describe the demagnetization process more thoroughly?  I've got
> quite a few TK50 tapes right now, but only a handful of TK70's.  The
> latter are hard to come buy.  One that I picked up still had a price
> tag on it: $29.95, marked down from $49.95!  I didn't pay that much,
> I'm happy to say.
> 
> Doug
I have tried degaussing coil for TV it works fine but takes rather long
time, I recomend audio tape bulk eraser, quick and leaves the tape
neutral ( done with alternating magnet field that is reduced)

Thordur Ivarsson