Economical Solid State Stereo Radio-Phonograph Designs

The premium cost areas of conventional transistor circuit design are reviewed. Performance attained in simplified designs is given for the tuner, multiplex detector, audio and power source chosen. Specific attention is given to AM and FM sensitivity, limiting, spurious response, and strong signal handling. New approaches to multiplex processing and tuning indication are described. A flexible audio system design and integrated packaging results in a basic chassis for a series of high fidelity instruments.