This symmetric 30 mA x 15 V power supply was found in the Ferranti transistor manual from 1974. Transistors are common types at the time.
This shield can be controlled by positive or negative voltages of the sensor acting as a...
Found in a 1970 publication by General Electric, this circuit makes use of a mobile...
Based on the Philips TDA3810N, this circuit was found in an 90s Electronics Now. The circuit has two...