Excerpt from Elements of Radio Telephony Function of Modulator Modulation by Antenna Control Microphone in Antenna Circuit - Magnetic Modulator Modulation by Variation of Tube Output - Plate Circuit Modulation - Grid Circuit Modulation. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Excerpt from Radio Telephony Since the publication of Dr. Erskine-Murray's excellent translation of Ruhmer's "Drahtlose Telephonie," there has appeared no complete exposition in any language, so far as the author is aware, of the important and growing field of radio telephony. The date of publication of Ruhmer's book was 1907, and in the succeeding decade advances have been made which render the methods there described obsolete. Accordingly the author has accepted the considerable task of writing a full description of the radio telephonic methods of the present in the thought that he might thus contribute to progress in that valuable art. Wherever possible, sufficiently complete descriptions of the apparatus employed have been given to enable the person skilled in the art to duplicate the results and to judge their value. In this connection, the ranges of transmission and the output power of the radiophonic stations have been presented. It has been thought, too, that the arrangement of apparatus in the set was of value in that it indicated how the various designers had attacked the problem of making radiophonic apparatus readily usable. It need hardly be stated that a good working knowledge of the methods and principles of modern radio telegraphy is necessary for the full appreciation of the material here set forth, though certain questions. common to both types of communication have been here considered in detail. The author desires to express his deep indebtedness for the valuable assistance in the form of information, illustrations, and diagrams which he has received from the following gentlemen and the organizations with which they are connected: Atlantic Communication Company and Messrs. Boehme, Brockmann and Reuthe; Compagnie Generale de Radiotelegraphie, and Lieutenants Colin and Jeance of the French Navy; Lieutenant W. Ditcham of the British Army; Mr. William Dubilier; Federal Telegraph Company and Mr. Leonard F.Fuller; General Electric Company and Messrs. E.F. W. Alexanderson, Albert W. Hull, and William C.White; Mr. W. Hanscom; Marconi Wireless Telegraph Company of America and Mr. Roy A. Weagant; National Electric Signaling Company and Mr. John L.Hogan, Jr.; Radio Telephone and Telegraph Company and Dr. Lee de Forest; Mr. Bowden Washington; Mr. Eitaro Yokoyama. Through their kindness he has been enabled to present here much important information and previously unpublished material. He also desires to commend highly the painstaking efforts of the editors of The Wireless Press to make this book measure up to the high aims of that organization. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Excerpt from Radio Telephony for Amateurs Truly Of the making Of many books there is no end and in view Of the large number Of radio books already existant and advertised as in the process Of preparation or printing, perhaps some justification is necessary for the appearance Of another. My apologia is a simple one, and possibly one engendered by ideas and aspirations not un familiar to all other radio amateurs. Since connecting up my first receiving apparatus in 1908 I have longed for the appearance of a certain type Of radio book; a book issuing preferably from the pen Of an amateur, radiating the true amateur Spirit Of inquest and investigation, a book chock full Of practical information and suggestions for new things to do and instructions for going about it, in a word, a book which would at once ignite the spark Of my enthusiasm and furnish the material for its combustion. Such a book has never appeared, nor ever shall for the great majority Of us, for we have all our own ideas as to what the ideal radio book for amateurs Should be like. But intercourse extending over a number Of years with kindred spirits and frequent discussions with them on this subject has induced the belief that in the main our ideas converge in a common channel. This book represents my conception Of the direc tion and breadth Of this channel. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
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Excerpt from Elements of Radiotelegraphy Although this text was written primarily for the guidance and instruction of radio students in the Communication Service of the Navy, it is believed that it will be found helpful in radio instruction in the other military branches of the Government, in civilian radio schools, and for the self instruction of those interested in the subject. Every attempt has been made to present the subject from the physical rather than the mathematical standpoint without sacrifice of technical accuracy, in order that the subject matter may be readily grasped by the layman. In the study of the text, a knowledge of elementary physics and simple mathematics is desirable but not necessary. It is believed that the logical instruction of the student should follow the development of the art by its inventors and scientific workers, consequently considerable prominence is given to the patent phase of the subject. The text, in the main, is a resume of a series of lectures given to the radio classes at this station, and was put into written form at the request of the men under instruction. Acknowledgment is gratefully made to the authors of the publications noted in the bibliography, to Chief Electrician (RO) R. B. Black, U.S.N.R.F., for the diagrams appearing in the text, to Ensign Rudolph Oeser, U.S.N., for assistance in its preparation, to Dr. Erich Hausmann of the Polytechnic Institute of Brooklyn for many valuable suggestions, and to the following for their courtesy in supplying photographs: Dr. F. A. Kolster of the Bureau of Standards; Federal Telegraph Co., Haller-Cunningham Electric Co., and the Moorhead Laboratories, of San Francisco; Kilboume & Clark Manufacturing Co. of Seattle; Weston Electrical Instrument Co. of Newark, and General Radio Co. of Cambridge. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Excerpt from Researches in Radio Telephony: A Thesis In the last few years the strides in radio telephony have been very rapid. About ten years ago the scientific world was first introduced to the fact that radio telephony was possible; but for the first few years following, the prorress in this branch was comparatively slow due to the difficulties in the generation of high frequency currents of the undamped wave type. The only two ways it was found possible to generate currents of this nature was by the arc generator or by the high frequency generator; but in the last six or seven years a - new type of generator has come ih to existence; namely, The Hot Cathode Vacuum Tube. This generator practically revolutionized the entire field of radio telephony and to a lesser extent radio telegraphy; but had it not been for the war, it is rather doubtful Whether our advancer in this science in the last four years. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
