This mixer with few components can be tried by the reader who needs this circuit, but who does not have time or components to elaborate a more complete project. The circuit is from 1982 documentation and is characterized by the unusual use of diodes that can cut peak signals if they are intense when they are inversely polarized. The signal strength applied to each channel is determined by the position of the potentiometer's cursor, while the diodes isolate the different inputs. In this application, the minimum signal voltage that each diode must receive to start conducting and the distortion that this component can introduce must be considered. In cases where the signals are relatively strong, or a relative level of distortion is admitted, this circuit should be tried.
