This is a diagram of a 1970s reel or tape recorder. It is an Italian Geloso recorder, quite popular at the time. The circuit is a reference for equipment recovery.
This circuit with the NE602 was found in the February 1997 Electronics Now magazine. The NE602...
We found this circuit in Radio Electronics magazine from September 1959. The circuit has different...
Found in a 90s Radio Electronics, this circuit uses an AD590 or AD592 for remote temperature...