This circuit is from a Radio Craft from the 1940's. The circuit employs 5 tubes and must be battery powered. See that the circuit is quite critical, especially in relation to the sensor coil.
This circuit was obtained in a Texas Instruments 2012 documentation, which consists of a current...
This circuit was found in a 1964 Electronic Design. It generates opposite phase signals from an...
This circuit uses a 7-segment display to indicate the logic level of a test circuit. The power...