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 #:
000178
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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L949 PORTABLE RECORDING SYSTEM 175 3-phase distributor system, or in a multiduty motor system energized from a 3-phase, 220-volt alternating-current line or 96-volt batteries. For multiduty motor operation an optional R A1444 control unit has been developed. This unit provides means for controlling one recorder motor and two camera motors when operating from either an alternatingor direct-current power source. When working from a 3-phase alternating-current supply all motors operate synchronously. When operating from batteries they may be operated individually or in interlock at film speeds of 21 to 25 frames per second for both 16-mm and 35-mm film. ZOO 500 1000 2000 FREQUENCY IN CYCLES PER SECOND Fig. 15 — RA-1283 mixer — dialog-equalizer characteristics. An RA-1289-A photographic slater and RA-1290-A film punch are available as accessory items. These mount within the recorder and are energized from the RA-1284 power unit. RESPONSE CHARACTERISTICS The over-all frequency-response characteristic of the system without equalization is essentially flat from 50 to 10,000 cycles per second with the amplifier on each of its gain settings. However, in actual practice the characteristic is always modified to achieve particular over-all effects as discussed below. Fig. 15 shows the frequency-response characteristic of the RA-1283 mixer, using the various steps of dialog equalization contained in each