Hi and thanks for the answers so far. Maybe I have to apologize
especially to Olly O'Leg for using the term "vintage" in my question
as these displays seem still to be airborne and some people may be
annoyed by this term!
For me the term "vintage" is in no way negative. As the development
ot the Tornado started (I think 1968), the computers of thoses days
where PDP8 with 12bit and 4k of memory. The legendary PDP11
was released in 1970. Both where rather large 19" machines - so
it was a masaterpiece to put a machine like this into a box like the
Programmer Electronic Control. Additionally IO-Devices in those days
have been the keyboard and the teletype - graphics displays where
NOT commonly available. So these TV-tab displays where ahead of
time those days. This is the reason why many people spend their
free time in getting hands on and keep machines like this running.
So sorry again if anyone feels offended by my question. My only
interest is understanding how this interesting technology was
implemented...
Best regards,
Erik.