I was once told a story about the big disk. It might be apocryphal but IIRC it did come from one of the astronomers there. One day during maintenance the dish was point horizontally and there were engineers working on the receptor at the focus. They were a little surprised to clearly hear the sound of children playing and able to make out voices. They realised that the telescope must be pointing at a school some distance away and picking up the kids in the playground.
Unable to resist temptation they started talking to the kids in a 'voice of God' sort of way and the playground went very quiet.
I hope it's a true story.