Journal of the Society of Motion Picture Engineers ( Volume: 30, Issue: 1, January 1938)

[ACTIVE]

Recent Development in Hill and Dale Recorders

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Publisher: SMPTE — White Plains, NY, USA
Doc Type: Journal Article
Content Type: Original Research
Abbreviated Title: J SMPE
Volume: 30, No. 1, pp. 96–104
Abstract: A new sound-on-disk recorder has been developed in which is used the principle of feeding part of the output of the system back to the input of the associated driving amplifier in properly controlled relationship. The use of this principle, which is widely used in feedback amplifiers, replaces the usual practice of providing dissipative elements for the control of an electrically driven vibrating system. Heretofore no practical application of feedback to electromechanical systems has been made, possibly because the requirements for stable operation of such systems are difficult of achievement. Through recent developments these requirements have been satisfactorily met. The new recorder is capable of recording on wax or direct-recording material without appreciable effect upon its characteristics, which include uniform response from 30 to 12,000 cps. and exceptional freedom from distortion. The recorder is extremely simple and affords easy means for field calibration from the feedback element, whose output is in direct proportion to the stylus velocity. These means also make available a monitoring voltage which, properly amplified, gives a precise aural picture of the stylus behavior during recording.
Publication Date: 1938-01-01
DOI: 10.5594/J14718
ISSN: Print: 0097-5834
Link: https://doi.org/10.5594/J14718
Author(s): L. Vieth
C. F. WiebuschBell Telephone Laboratories, New York, N. Y.
Copyright: © 1938 Society of Motion Picture and Television Engineers, Inc.

Bibliographic Reference(s)

1. Frederick H. A. : “Vertical Sound Records: Recent Fundamental Advances in Mechanical Recordings on ‘Wax,'” J. Soc. Mot. Pict. Eng. , XVIII (Feb., 1932 ), No. 2 , p. 141 . EXTERNAL
2. Nyquist H : “Regeneration Theory,” Bell Syst. Tech. J. , XI (Jan., 1932 ), No. 1 , p. 126 . EXTERNAL
3. Black H. C. : “Stabilized Feedback Amplifiers,” Bell Syst. Tech. J. , XIII (Jan., 1934 ), No. 1 , p. 1 . EXTERNAL

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L. Vieth and C. F. Wiebusch; Recent Development in Hill and Dale Recorders, Journal of the Society of Motion Picture Engineers ( Volume: 30, Issue: 1, January 1938); SMPTE, 1938. Available at https://doi.org/10.5594/J14718

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L. Vieth and C. F. Wiebusch; Recent Development in Hill and Dale Recorders, Journal of the Society of Motion Picture Engineers ( Volume: 30, Issue: 1, January 1938); SMPTE, 1938. Available at https://doi.org/10.5594/J14718

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<span class="citation">L. Vieth and C. F. Wiebusch; <cite>Recent Development in Hill and Dale Recorders</cite>, Journal of the Society of Motion Picture Engineers ( Volume: 30, Issue: 1, January 1938); SMPTE, 1938. Available at <a href="https://doi.org/10.5594/J14718" target="_blank" rel="noopener">https://doi.org/10.5594/J14718</a></span>

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L. Vieth and C. F. Wiebusch; Recent Development in Hill and Dale Recorders, Journal of the Society of Motion Picture Engineers ( Volume: 30, Issue: 1, January 1938); SMPTE, 1938
doi: 10.5594/J14718
url: https://doi.org/10.5594/J14718

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<li>
L. Vieth and C. F. Wiebusch; <cite id="bib-10-5594-j14718">Recent Development in Hill and Dale Recorders</cite>, Journal of the Society of Motion Picture Engineers ( Volume: 30, Issue: 1, January 1938); SMPTE, 1938
<span class="doi">10.5594/J14718</span>
</li>