This electrical drawing is the manual tuning radio circuit diagram for the 1960 Chevrolet all passenger car models. This is a 4 tube radio that comes with a transistor superheterodyne car receiver. The radio comes along with a radio receiver unit and external speaker. Electrical components shown in wiring image are like; audio output hi power transistor, oscillator – modulator, detector – automatic volume control and first audio, and radio frequency amplifier. Click on image to view it larger in a new tab.