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Author: A. Frederick Collins
Publisher: anboco
ISBN: 3736407920
Category : Fiction
Languages : en
Pages : 316
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Book Description
Before delving into the mysteries of receiving and sending messages without wires, a word as to the history of the art and its present day applications may be of service. While popular interest in the subject has gone forward by leaps and bounds within the last two or three years, it has been a matter of scientific experiment for more than a quarter of a century. The wireless telegraph was invented by William Marconi, at Bologna, Italy, in 1896, and in his first experiments he sent dot and dash signals to a distance of 200 or 300 feet. The wireless telephone was invented by the author of this book at Narberth, Penn., in 1899, and in his first experiments the human voice was transmitted to a distance of three blocks. The first vital experiments that led up to the invention of the wireless telegraph were made by Heinrich Hertz, of Germany, in 1888 when he showed that the spark of an induction coil set up electric oscillations in an open circuit, and that the energy of these waves was, in turn, sent out in the form of electric waves. He also showed how they could be received at a distance by means of a ring detector, which he called a resonator.
Author: A. Frederick Collins
Publisher: anboco
ISBN: 3736407920
Category : Fiction
Languages : en
Pages : 316
Get Book
Book Description
Before delving into the mysteries of receiving and sending messages without wires, a word as to the history of the art and its present day applications may be of service. While popular interest in the subject has gone forward by leaps and bounds within the last two or three years, it has been a matter of scientific experiment for more than a quarter of a century. The wireless telegraph was invented by William Marconi, at Bologna, Italy, in 1896, and in his first experiments he sent dot and dash signals to a distance of 200 or 300 feet. The wireless telephone was invented by the author of this book at Narberth, Penn., in 1899, and in his first experiments the human voice was transmitted to a distance of three blocks. The first vital experiments that led up to the invention of the wireless telegraph were made by Heinrich Hertz, of Germany, in 1888 when he showed that the spark of an induction coil set up electric oscillations in an open circuit, and that the energy of these waves was, in turn, sent out in the form of electric waves. He also showed how they could be received at a distance by means of a ring detector, which he called a resonator.
Author:
Publisher:
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 662
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Book Description
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ISBN:
Category : Radio
Languages : en
Pages : 1180
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Book Description
Author: Archie Frederick Collins
Publisher:
ISBN:
Category : Radio
Languages : en
Pages : 476
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Book Description
Author:
Publisher:
ISBN:
Category : Radio
Languages : en
Pages : 264
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Book Description
Author:
Publisher:
ISBN:
Category : Radio
Languages : en
Pages : 662
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Book Description
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ISBN: 9780872591615
Category : Radio
Languages : en
Pages : 648
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Book Description
Author: Archie Frederick Collins
Publisher: HarperCollins Publishers
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 402
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Book Description
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Publisher:
ISBN:
Category :
Languages : en
Pages : 580
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Book Description
Author: American Radio Relay League
Publisher: American Radio Relay League (ARRL)
ISBN: 9780872599291
Category : Radio
Languages : en
Pages : 0
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Book Description
... by far the most extensively revised version of this work in ten years. And, for the first time, this edition is bundled with The ARRL handbook CD (version 9.0)--the fully searchable and complete book on CD-ROM (including many color images).