Baseball shirts were a thing. Jed The Fish, Pasadena KROQ control room. There were carts everywhere. Similar to the old 8-track cartridges, these had a continuous loop with a stop tone (to stop the machine the last time someone played it) just before the beginning of each recording. So when you plugged it in to play it, it was always ready. It was quite a reliable system, which is why the cart machines such as ITC existed for 50 years. Hassle recording the cart in the first place, but I did it for the Go-Gos, who gave me a demo lacquer of “Cool Jerk.”