>2) I have
quite a number (maybe around six or seven) of rackmount
> dual cassette tape units for these machines. I seem to recall that
> they use cassette tapes that are not identical to the standard
> common audio cassettes available today. Is anyone aware of where
> these special tapes can be purchased new?
If they are identical to the ones I'm thinking of, they have a notch
at the back. This notch of off-center. It enables you to test whether
your are accessing side A or side B.
I've used them extensively in Philips equipment, but they were also
used by Facit and others.
The capacity is 250k bytes per side, and the format is called ECMA34
One thing that I forgot to mention in my earlier msessag eis that the
tape is differnet to that found in audio compact cassettes (I believe the
data tapes have a higher coercivity). So nothcing the shells of audio
cassettes is unlikely to produce reliable data tapes.
-tony