This was RCA's automated quad spot player. It consisted of two parts: the TCR-100 dual tape transport and the SPU-100 signal processing unit. The machine was instantly recognizable by it's horizontal oval cart belt on the front of the machine. The transports were acessible from behind and pulled out on slides. Like the later ACR-25, the TCR-100 was a pneumatic monster with lots of intricate air-operated mechanisms. In fact, most machines I have seen were equipped with an after-market indicator panel that indicates the state of the elaborate tape-loading mechanism. This was used to diagnose problems with the loading mechanism. These machines also make characteristic noises during loading that will make one always remember a TCR-100 when they hear one!
Additional Detailed Information:
The picture is from the RCA installation of WREG Memphis in 1976,
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