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 was found in Maxim's documentation from the 90's. The configuration uses components...
We found this motor control circuit that uses only transistors in a 2003 documentation. The H...
This well-designed phase shift oscillator configuration was found in ancient European...