March 31, 20206 yr On 2020/03/26 at 7:23 PM, Richard Mackay said: There was probably a battery room at the end of the main bus bars with banks of massive 2V cells? Yes. There was a room full of very large batteries. From memory there was massive rectifier circuitry to trickle charge the batteries from mains, so the exchange could run for a period of time without municipal power. There may have been a generator too. This is a long time ago, back in the 70s. Early on the Dept showed the new recruits all the wonderful career paths they could follow. We were taken up to a microwave repeater station on a ridge near Overport. There there were no cables, everything was moved around using wave guides - pipes with a reflective lining that could "bounce" the microwaves around corners when required. These had to be terminated, and there were lurid legends about technicians removing the terminator plate and danging a sandwich in front of the now open guid to toast it. There was one piece of unterminated guide in the exchange. I assume there was no input into this, but there was a sign saying "do not look down wave guide with remaining eye".
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