Real tape drive densities

[Christian Corti]

On Wed, 10 Feb 2016, CuriousMarc wrote:
>> Note that Christian Corti stated that his drive is capable of 9-track
> operation.  That's an E.

It is not an E.

>> (Apparently that will also write 9-track PE at 1600bpi, but it will write
> 9-track NRZI at 800bpi).

I would know that ;-)

> Interesting. So what model do you think he has? For example, from the manual
[...]
> That's why I thought he had a 7970A or a 7970B (-136), that can read and
> write 200, 556 and 800 NRZI. This would match all the front panel buttons we
[...]

I have a 7970B (-236) with options 127, 006, 007, 012 and 023.

More and better pictures are here now:
http://computermuseum.informatik.uni-stuttgart.de/pics/hp1000/7970/

Christian