Gramophone-record reproduction: development, performance and potential of the stereophonic pickup
James H. Kogen · Proceedings of the Institution of Electrical Engineers · 1969
This paper describes the development of the stereophonic gramophone pickup since 1958. The basic requirements for such a pickup are given. The characteristics of the early pickups and improvements over the past ten years are discussed. Emphasis is placed on tracing and tracking distortion, mistracking and frequency response. The paper concludes with a list of problems which must still be resolved.