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 #:
000283
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:
August 01, 2024
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MANAGERS AND PROJECTIONISTS 1207 The amplifying unit is of the rack-panel design. It stands forty (40) inches high, is thirty-one (31) inches wide and twenty-two (22) inches deep. It is what is known as a 3-stage unit, the last two stages of amplification being push-pull stages. (See Push-pull, page 1215). The tubes are one UY 227, two UX 226, two UX 250 and two UX 281s. Figure 438. Amplifying Panel. OVERLOAD ABILITY.— The manufacturer claims that all the equipment is so made that it has ability to stand from fifty (50) to seventy-five (75) per cent overload temporarily, which will be ample to take care of possible current surge caused by one of the tubes becoming inoperative. Overload thus set up is taken care of