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Dual‐Stylus Ceramic Phonograph Pickup Development

 

作者: H. W. Koren,   H. A. Pearson,   H. Klingener,   R. W. Sabol,  

 

期刊: The Journal of the Acoustical Society of America  (AIP Available online 1954)
卷期: Volume 26, issue 1  

页码: 15-17

 

ISSN:0001-4966

 

年代: 1954

 

DOI:10.1121/1.1907281

 

出版商: Acoustical Society of America

 

数据来源: AIP

 

摘要:

The freedom from humidity and temperature limitations have made ferroelectric ceramics valuable type of transducer for phonograph pickups (originally designed for 78 rpm records). Two groove sizes now indicate the use of dual styli. A pickup structure is described in which dual styli are used hack‐to‐back on one lever. A mechanism provided on the bottom of the pickup whereby the stylus assembly can be turned over to present the proper stylus to the record. This structure imposes no dynamical limitations on the performance of the pickup, as the additional mass required for the second stylus is only a small percentage of the total mass, and no additional stiffness constraints are imposed on the system.Reasonably flat characteristics have been obtained. In one commercial model a sensitivity of over one‐half volt is achieved on microgroove records, with a frequency range to 10 000 cps with a tracking force of 6 grams for microgroove and 9 grams for standard‐groove records.

 

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