Sound motion pictures : from the laboratory to their presentation (1929)

Page scan 000140 from Sound motion pictures : from the laboratory to their presentation

Record Details:

Title:
Sound motion pictures : from the laboratory to their presentation
Date:
1929
Publisher:
Garden City : Doubleday, Doran & Company, Inc.
Volume:
Sound motion pictures : from the laboratory to their presentation
Leaf #:
000140
Language:
English
Subjects:
Motion Pictures, Motion pictures--Technology
Collection:
Books
Format:
Books
Contributor:
Media History Digital Library
Sponsor:
Media History Digital Library
Coordinator:
Media History Digital Library
Description:
Date Added:
August 22, 2024
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i2o SOUND MOTION PICTURES sufficient strength to separate the loudspeaking units. This is incorporated in one main amplifier panel with several different individual panels. Beginning at the top, the following list gives the names of the equipment on the front of the output control panel. Electrical Research Products, Incorporated, have installed a number of the 2-SX equipments. OUTPUT PANEL Theatre Horn Controls Theatre Horn Keys Monitor Horn Control Monitor Horn Key Input Key (The key should always be kept in running position.) 4I-A AMPLIFIER Plate Current Meter Gain Control (The Gain Control is an emergency potentiometer, which can be used in case the main fader gives trouble.) Filament Current Meter Filament Control. Plate Current Push-Buttons (Please note that the plate current on all three tubes with 41 -A amplifiers should be ifV, and these readings should be well equalized. Provided they are not well equalized, it is necessary to change the tubes so that the meter reading is approximately or a little above ItV There are three Western Electric 239 type vacuum tubes. There is also a filament key on the 41-A amplifier panel. Please note that this switch must always be placed on the "on position.") 42-A AMPLIFIER PANEL (This amplifier has two Western Electric 205 type vacuum tubes, and also two Western Electric 205 type vacuum tubes used for the rectifier. Please note