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Journal of the Society of Motion Picture Engineers ( Volume: 26, Issue: 2, February 1936)
[ACTIVE]

Mechanical Reversed-Bias Light-Valve Recording

Metadata

Publisher
SMPTE — White Plains, NY, USA
Doc Type
Journal Article
Content Type
Original Research
Abbreviated Title
J SMPE
Volume
26, No. 2, pp. 117–127
Abstract
Many methods have been applied recently for increasing the volume range of recordings. Some, such as the push-pull system, require mechanical and electrical modification of existing apparatus in order to utilize their advantages. In an effort to produce prints capable of standard reproduction, with increased signal-to-noise ratio, the mechanical reversed-bias method has been used at the Twentieth Century-Fox Film Studios. Briefly, it is a method of reverse-biasing a valve so that the valve aperture is increased by the biasing current to a degree sufficient to prevent clash. Further modification provides for a combination of standard biasing up to a certain percentage of modulation and mechanical reverse-biasing from that point on, resulting in an increase of 8 to 12 decibels over the usual methods in signal-to-noise ratio.
Publication Date
1936-02-01
DOI
10.5594/J08712
ISSN
Print: 0097-5834
Link
https://doi.org/10.5594/J08712
Author(s)
E. H. Hansen
C. W. FaulknerTwentieth Century-Fox Film Corp., Hollywood, Calif.
Copyright
© 1936 Society of Motion Picture and Television Engineers, Inc.
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E. H. Hansen and C. W. Faulkner; Mechanical Reversed-Bias Light-Valve Recording, Journal of the Society of Motion Picture Engineers ( Volume: 26, Issue: 2, February 1936); SMPTE, 1936. Available at https://doi.org/10.5594/J08712
Snippet:
E. H. Hansen and C. W. Faulkner; Mechanical Reversed-Bias Light-Valve Recording, Journal of the Society of Motion Picture Engineers ( Volume: 26, Issue: 2, February 1936); SMPTE, 1936. Available at https://doi.org/10.5594/J08712

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E. H. Hansen and C. W. Faulkner; Mechanical Reversed-Bias Light-Valve Recording, Journal of the Society of Motion Picture Engineers ( Volume: 26, Issue: 2, February 1936); SMPTE, 1936. Available at https://doi.org/10.5594/J08712
Snippet:
<span class="citation">E. H. Hansen and C. W. Faulkner; <cite>Mechanical Reversed-Bias Light-Valve Recording</cite>, Journal of the Society of Motion Picture Engineers ( Volume: 26, Issue: 2, February 1936); SMPTE, 1936. Available at <a href="https://doi.org/10.5594/J08712" target="_blank" rel="noopener">https://doi.org/10.5594/J08712</a></span>

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Preview:
E. H. Hansen and C. W. Faulkner; Mechanical Reversed-Bias Light-Valve Recording, Journal of the Society of Motion Picture Engineers ( Volume: 26, Issue: 2, February 1936); SMPTE, 1936
doi: 10.5594/J08712
url: https://doi.org/10.5594/J08712
Snippet:
<li>
E. H. Hansen and C. W. Faulkner; <cite id="bib-10-5594-j08712">Mechanical Reversed-Bias Light-Valve Recording</cite>, Journal of the Society of Motion Picture Engineers ( Volume: 26, Issue: 2, February 1936); SMPTE, 1936
<span class="doi">10.5594/J08712</span>
</li>

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