The operational 714 (not the 741) is an old Raytheon type that is no longer common today. The circuit can be implemented with modern operational. The power supply must be symmetrical.
This plug-in control was found in General Electric documentation from the 1970s. The SCR can be...
This circuit digitally selects the inputs of a sound system by applying its signals to the...
Found in 1965s General Electric documentation, this circuit is intended for the control of servos...