Motion picture sound engineering (1938)

Record Details:

Title:
Motion picture sound engineering
Date:
1938
Publisher:
New York : D. Van Nostrand Company, inc.
Volume:
Motion picture sound engineering
Leaf #:
000235
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:
May 30, 2024
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TRANSFORMERS FOR SOUND CIRCUITS 205 high, there are two conflicting demands, one for many turns and the other for few. The output transformer differs from the input and inter-stage transformer in that it is a stepdown transformer, and the impedances between which it works are usually considerably less, which makes — Reprinted by petmUtion from "Electrical Engineers' Handbook," by Pender and Mcllwain, published by John Wiley & Sons, Inc. Figure 145 — Curves showing leakage resonance for different ratios of inductance, capacity, and resistance. possible the use of a proportionately large number of turns without introducing the inherent difficulties of high leakage reactances and distributed capacity. Consequently, if weight is of no particular importance, the core material may be of the lower permeability grade (Figure 148). 100 i.ooo Frequency Cyc!e6 p«r Second -From "Radio Engineering," by Frederick E. Terman (McGraw-Hill Book Co., Inc.). Figure 146. Improvements in frequency response during the past few years have required marked changes in transformers, some of which have