Using the LM170 integrated circuit, this circuit was found in the May 1970 Radio Electronics magazine. The transistor is general-purpose, and the potentiometer adjusts the gain.
This circuit converts signals from the longwave band of 350 kHz to 500 kHz to 4.35 to 5MHz. The...
This circuit can generate audio signals at frequencies ranging from 0.01 Hz to approximately 20...
This circuit is from a 1976 documentation. It provides a pulsating DC voltage that can be varied...