F. H. Richardson's bluebook of projection (1935)

Page scan 000554 from F. H. Richardson's bluebook of projection

Record Details:

Title:
F. H. Richardson's bluebook of projection
Date:
1935
Publisher:
New York : Quigley Publishing Company, Inc.
Volume:
F. H. Richardson's bluebook of projection
Leaf #:
000554
Language:
English
Subjects:
Motion Pictures, Motion Picture Technology
Collection:
Books
Format:
Books
Contributor:
Media History Digital Library
Sponsor:
{"Media History Digital Library","Jeff Joseph"}
Coordinator:
Media History Digital Library
Description:
Date Added:
August 01, 2024
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CHAPTER XXVIII THEORY AND WIRING OF AMPLIFIERS Tubes are the heart of every amplifier, and their construction and operation must be understood before the circuits of amplifiers can have any meaning. Constructing a 3-Element Vacuum Tube (1) The three-element amplifying tube consists partly of a cathode and an anode placed in a vacuum, and to that extent is in no way different from the rectifier tubes described on Page 498. (2) The amplifier tube can be thought of most conveniently as a rectifier tube with one element added, namely, the grid, or, more accurately the control grid (since there are also four and five-element amplifying tubes that contain additional grids of no importance to the present discussion). Such additional grids are explained on Page 546. The commonest type of amplifying tube contains only cathode, anode and control grid. The control grid is placed between the cathode and the anode. Negatrons emitted Fig. 126. — Three-electrode tube or triode. by the cathode, and moving toward the anode, must pass through the control grid to reach their objective. That is the essential point about the tube's construction. The Cathode of the Amplifier Tube Cathodes in amplifier tubes are of two general types, 536