Quote:
Originally Posted by Woodronics
Common in the heyday of quad machines [two inch tape] were head clogs on-air.
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Back in 1981 I was working at the RCA Sarnoff Lab, and had a business related trip to NYC, to the CBS network head end. Back then they had two videotape machines, synchronized to the frame, playing the same programming feeding all the CBS TV stations in the eastern and central time zones of the USA. Two machines, so if the one actually on the air suddenly has a problem, the tech on duty would hit a switch to place the other machine on the air, taking the problem machine off the air so it could be fixed. So viewers would not miss a second of a soap opera.