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

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 #:
000176
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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156 SOUND MOTION PICTURES B. A. C. Motor Drive Snap the "Line" switch to "Off." VIII. SHUTTING DOWN AMPLIFIER Before shutting down the amplifier at the end of a performance check all meter readings to assure proper operation of the amplifier. To shut down the amplifier proceed as follows: (i) Throw the switch marked "Cones" on the sectionalizing panel to "Off," and run the "Gain Control" to zero; (2) snap the switch marked "Charge Battery" to the "Off" position and adjust "IP Front Tubes" and "IP Back Tubes" meter readings as low as possible, that is, toward zero; (3) cut in all resistance on both lamp rheostats; (4) throw both switches on input panel to the "Off" position; (5) push the "Stop" button on the switch marked "Amplifier Plate and Filament Generator." IX. PHONOGRAPH OPERATION A plug marked "Phonograph Pick-up," is provided on the amplifier to plug in the output of a magnetic pick-up type phonograph. The plug is provided so that incidental music may be played as required. Plug the output of the phonograph in the jack; and, with the amplifier in the normal operating condition, regulate the volume by means of the "Gain Control." Do not run a sound film with the phonograph plugged in. Note: A glossary of technical terms will be found at the end of the book.