Richardson's handbook of projection (1930)

Record Details:

Title:
Richardson's handbook of projection
Date:
1930
Publisher:
New York : Chalmers Publishing Company
Volume:
Richardson's handbook of projection
Leaf #:
000285
Language:
English
Subjects:
Motion Pictures, Motion Picture Technology
Collection:
Books
Format:
Books
Contributor:
Media History Digital Library
Sponsor:
Media History Digital Library
Coordinator:
Media History Digital Library
Description:
Date Added:
March 28, 2024
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MANAGERS AND PROJECTIONISTS 1209 ducer is desired it is imperative that the windings of the reproducer unit match with those of the output device of the amplifier. If this is not done, distortion and poor reproduction will be had. It is possible for any output device for any type speaker to be furnished. CONTROL PANEL.— Examining Fig. 438 we see two meters. The one on the left indicates the current strength or current flow on the first two stages of amplification. The one on the right indicates the current flow on the final stage of amplification. The volume controls are mounted on the control panel. These are connected across the first and second audio stages. There also are two voltage controls on the control panel. They control the voltage of the first two stages of amplification. On the instrument panel are three speaker controls by means of which the volume of individual horns or speakers may be regulated. One of these may be utilized if a monitor horn be used. High frequency cut-off switches are included in the equipment. These are used when a worn or dusty record is used. By their use the frequency in which the resultant noises are worst may be eliminated. Also there is a special input transformer included in the outfit for those who contemplate using synchronized sound in the future, and may wish to use this equipment for that work. The entire unit has an output of over twenty (20) watts. It will therefore operate from four to six dy