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Journal of the Society of Motion Picture Engineers ( Volume: 16, Issue: 6, June 1931)
[ACTIVE]

An A-C. Operated Sound Motion Picture Reproducing Equipment

Metadata

Publisher
SMPTE
Doc Type
Journal Article
Article Type
research-article
Abstract
This paper describes the RCA-Photophone type PG-30 sound motion picture reproducing equipment, which requires no batteries or motor-generator sets for plate, filament, and bias voltages, for operation in theaters wired with the normal 105 to 125 volt, 50 to 60 cycle, a-c. power. This equipment, primarily designed for theaters having seating capacities for 1000 persons or less, operates with inaudible output hum under operating conditions, is economical of the space it occupies, is easily serviceable, has an over-all frequency characteristic anticipating future improvements in sound-on-film recordings, has sufficient undistorted power output for providing satisfactory distribution of sound in the type of theater for which it is designed, and has provision for the addition of a remotely operated volume control where desired.
Publication Date
1931-06-01
DOI
10.5594/J08045
Link
https://doi.org/10.5594/J08045
Author(s)
T. D. Cunningham
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T. D. Cunningham; An A-C. Operated Sound Motion Picture Reproducing Equipment, Journal of the Society of Motion Picture Engineers ( Volume: 16, Issue: 6, June 1931); SMPTE, 1931. Available at https://doi.org/10.5594/J08045
Snippet:
T. D. Cunningham; An A-C. Operated Sound Motion Picture Reproducing Equipment, Journal of the Society of Motion Picture Engineers ( Volume: 16, Issue: 6, June 1931); SMPTE, 1931. Available at https://doi.org/10.5594/J08045

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T. D. Cunningham; An A-C. Operated Sound Motion Picture Reproducing Equipment, Journal of the Society of Motion Picture Engineers ( Volume: 16, Issue: 6, June 1931); SMPTE, 1931. Available at https://doi.org/10.5594/J08045
Snippet:
<span class="citation">T. D. Cunningham; <cite>An A-C. Operated Sound Motion Picture Reproducing Equipment</cite>, Journal of the Society of Motion Picture Engineers ( Volume: 16, Issue: 6, June 1931); SMPTE, 1931. Available at <a href="https://doi.org/10.5594/J08045" target="_blank" rel="noopener">https://doi.org/10.5594/J08045</a></span>

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Preview:
T. D. Cunningham; An A-C. Operated Sound Motion Picture Reproducing Equipment, Journal of the Society of Motion Picture Engineers ( Volume: 16, Issue: 6, June 1931); SMPTE, 1931
doi: 10.5594/J08045
url: https://doi.org/10.5594/J08045
Snippet:
<li>
T. D. Cunningham; <cite id="bib-10-5594-j08045">An A-C. Operated Sound Motion Picture Reproducing Equipment</cite>, Journal of the Society of Motion Picture Engineers ( Volume: 16, Issue: 6, June 1931); SMPTE, 1931
<span class="doi">10.5594/J08045</span>
</li>