Principles Of Radiotelegraphy - Tapa blanda

Jansky, Cyril M

9781163775424: Principles Of Radiotelegraphy

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ISBN 10: 1163775428 ISBN 13: 9781163775424

Editorial: Kessinger Publishing, 2010

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Principles of Radiotelegraphy is a comprehensive guide to the principles of radiotelegraphy written by Cyril M. Jansky. The book covers the fundamental concepts of radio communication, including the generation and transmission of radio waves, the properties of electromagnetic waves, and the principles of modulation and demodulation. It also includes detailed discussions on the principles of radio receivers and transmitters, as well as the various types of antennas used in radiotelegraphy. The book is written in a clear and concise manner, making it accessible to both students and professionals in the field. It also includes numerous illustrations, diagrams, and examples to help readers understand the concepts discussed. Overall, Principles of Radiotelegraphy is an essential resource for anyone interested in the principles and applications of radio communication.This scarce antiquarian book is a facsimile reprint of the old original and may contain some imperfections such as library marks and notations. Because we believe this work is culturally important, we have made it available as part of our commitment for protecting, preserving, and promoting the world's literature in affordable, high quality, modern editions, that are true to their original work.

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This scarce antiquarian book is a selection from Kessinger Publishing's Legacy Reprint Series. Due to its age, it may contain imperfections such as marks, notations, marginalia and flawed pages. Because we believe this work is culturally important, we have made it available as part of our commitment to protecting, preserving, and promoting the world's literature. Kessinger Publishing is the place to find hundreds of thousands of rare and hard-to-find books with something of interest for everyone!

Rese�a del editor

The transmission of messages by radio signals is to many a mysterious process. The mystery, however, is not inherent in the transmission of intelligence by ether waves for almost every light-house is a radio transmitter which sends out signals by long and short groups of waves, and by waves of different lengths, that is, white and colored light. This is never considered mysterious for the simple reason that nature has furnished man with a sense organ by means of which these light waves are detected. If human beings were blind, like the fish of Mammoth Cave, the detection of light signals would become a very difficult and mysterious process. No light signals could be detected unless some means were devised for translating or converting light phenomena into phenomena capable of detection by some one of the other senses. The mystery and difficulty of radio communication is primarily due to the fact that nature has not provided man with a sense organ which is capable of detecting electromagnetic waves immediately, but these waves must first be translated into other phenomena. It is undoubtedly true that space is filled with phenomena of which we are wholly unconscious, or in other words to which we are totally blind. This was true of electromagnetic waves until means of detecting these waves were devised. In reality they are no more mysterious than light. Since radiotelegraphy is an electromagnetic phenomenon, and electric and magnetic apparatus is employed in the generation and detection of electromagnetic waves, a goodly portion of this book is devoted to a discussion of electromagnetic theory and apparatus, for without an understanding of these the student cannot understand the principles of the operation of radiotelegraphic apparatus. He may learn to operate it, but such operation will be merely a mechanical and not an intelligent process. Although the treat
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