The purpose of this circuit is to measure the intensity of audio signals. We found it in the September 1990 issue of Radio Electronics magazine. The circuit works as a S meter.
This oscillator circuit for sinusoidal audio signals with operational 741 requires a symmetrical power...
This circuit was found in a factory manual from the 1980s. It can serve as the basis for an...
This circuit for the AM band with two transistors was found in the June 1960 Radio Electronics magazine....