Journal of the Society of Motion Picture Engineers (1930-1949)

Record Details:

Title:
Journal of the Society of Motion Picture Engineers
Date:
1930-1949
Publisher:
New York, N.Y. : The Society
Volume:
Journal of the Society of Motion Picture Engineers
Leaf #:
000166
Language:
English
Collection:
Technical Journals
Format:
Periodicals
Contributor:
Prelinger Library
Sponsor:
MSN
Coordinator:
Media History Digital Library
Description:
The Journal of the Society of Motion Picture Engineers (SMPE)Êdocuments the technological progress of the film industry, highlighting technical developments in production and exhibition. Of special interest are articles about special effects, theater practices, lighting, and the introduction of the 16mm format. Initially titled "Transactions of the Journal of the Society of Motion Picture Engineers."Digitized by the Prelinger Library and the Library of Congress Motion Picture, Broadcasting and Recorded Sound Division.
Date Added:
July 19, 2022
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1949 PORTABLE RECORDING SYSTEM 163 dbm for 0-decibel meter deflection. Direct-monitor level for the mixer operator is adjustable by means of a bridged-T continuously variable attenuator which provides a level from — 10 dbm to cutoff for 100 per cent modulation of the light valve. An auxiliary directmonitor circuit, at a fixed level of — 18 dbm for 100 per cent lightvalve modulation, is provided for the microphone-boom operator. The RA-1283 mixer requires 0.6 ampere at 8.3 volts direct current for the vacuum-tube heaters and the volume-indicator meter lamp, and 5 milliamperes at 220 volts direct current for the plate supply. A front view of the mixer, with cover removed, is shown in Fig. 3. The mixer potentiometer and dialog equalizer for one microphone channel are on the left and for the other on the right. In the central Fig. 3— RA-1283 mixer— front view. portion, below the volume-indicator meter, from left to right, are the phototube, direct switch, volume-indicator range switch, and monitor volume control. A rear view of the mixer is shown in Fig. 4. On the left side is the mixer monitor jack. On the rear are receptacles for two microphone cables, low and high-level interconnecting cables to the R A1282 amplifier, and auxiliary monitor. The cover, not shown in the photographs, can also be latched to the under side of the mixer when the equipment is in use, thus avoiding the possibility of its being left behind as the mixer is moved about from one setup position to another. The mixer is 153/4 inches long by 6 inches high by 8 l/z inches deep, including cover, and weighs 1 7 J/2 pounds.