MaxPete;
quote" The CSUs were controlled by duplicated PDP-11 mini computers that weighed about 40 lb each and were rack-mounted - so you had to take the term "mini" with a grain of salt."
The PDP computers reference, takes be back to my work in a nuclear power plant. From 1986 to 2001 I worked as an operator on a robotic system that fueled and defueled four 880 megawatt Candu reactors. Unlike american nuclear reactors, the Candu reactor needs to be fueled every day, 365 days of the year. Fueling is done with the reactor at full power, which is 10.5 MPa pressure and
305 C temperature. It was a very interesting job, and I enjoyed it a lot. Our first computers were the DEC PDP 11-34, which were used during the commissioning period, but they soon proved to be too slow to do the job. Within a couple of years, they were replaced with
DEC PDP 11-70 computers, which proved to be powerful and quite capable. Our robotic systems required ten PDP 11-70s.
Yes, in those days computers were not small. The PDP 11-70 was about the size of 2 refrigerators, and the dual hard drive discs were about the diameter of a pizza. Weight.......................maybe 150 to 200 lbs.
I was trained as a radio technician while in the RCAF, when I was 17 to 19. The training I received there has helped me tremendously
over my entire working life. I then spent the next 6.5 years installing and testing telephone central office equipment, and microwave radio transmitters, as well as multiplex communication equipment. This involved a lot of travel all over Canada. I never unpacked my suitcase for those 6.5 years. Air miles................................too large to even count up.
By age 25, with a growing family, it was time to settle down. I became an operator with the provincial large utility (Ontario Hydro). Worked in coal fired and oil fired stations, and then transferred to the nuclear division. I spent a total of 29 years in the
"making electricity" business. I ended a very rewarding career, as a junior manager.
I finally found what I do best.......................retirement