Cinematographic annual : 1930 (1930)

Record Details:

Title:
Cinematographic annual : 1930
Date:
1930
Publisher:
Hollywood : The American Society of Cinematographers, Inc.
Volume:
Cinematographic annual : 1930
Leaf #:
000383
Language:
English
Subjects:
Motion Pictures, Motion Picture Technology
Collection:
Books
Format:
Books
Contributor:
Media History Digital Library
Sponsor:
{"Media History Digital Library","Richard Koszarski","Jeff Joseph"}
Coordinator:
Media History Digital Library
Description:
Date Added:
March 21, 2024
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FOX MOVIETONE SYSTEM 363 presents the amount of energy prevailing at different parts of the recording circuit. Under CT, which is the abbreviation for condenser transmitter, we find that this unit plus the condenser transmitter amplifier is capable of a range of approximately FIGURE 6 45 db from minus 85 db to minus 43 db. The passage of these voice currents through the mixing panel is attenuated approximately 6 db, and then it is raised in the 8C amplifier to a maximum gain of approximately 80 db. The level at the Aeolight is approximately plus 12 db, and for direct monitoring the drop across a resistor in the Aeolight circuit provides a new monitoring level of approximately 50 db, which is then raised in an AC operated amplifier of the type 41-A and 42-A, to approximately plus 16 db for final output into the monitoring horns.