----- Original Message -----
From: "Nico de Jong" <nico at farumdata.dk>
To: "General Discussion: On-Topic and Off-Topic Posts"
<cctalk at classiccmp.org>
Sent: Sunday, August 01, 2010 7:44 PM
Subject: Re: DG 800/1200 questions
Jay West wrote :
>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
I seem to remember that the tape is "stiffer" then the one in audio
cassettes. The magnetic coating is also different, in order to keep
the bits "square". Normal audio could be used, but gives errors when
reading (IIRC)