The World of Ham Radio, 1901-1950: A Social HistoryMcFarland, 28.01.2015 - 292 Seiten During the first fifty years of the twentieth century, ham radio went from being an experiment to virtually an art form. Because of the few government restrictions and the low monetary investment required, the concept of ham radio appealed to various people. More than just a simple hobby, however, ham radio required its operators to understand radio theory, be able to trace a schematic and know how to build a transmitter and receiver with whatever material they might have available. With the advent of World War II and the increased need for cutting-edge communications, the United States government drew upon the knowledge and skill of these amateur ham radio operators. This book explores the history of ham radio operators, emphasizing their social history and their many contributions to the technological development of worldwide communications. It traces the concept of relays, including the American Radio Relay League, from contacts as close as 25 miles apart to operators anywhere in the world. The book highlights the part played by ham radio in many of the headline events of the half century, especially exploration and aviation "firsts". The ways in which these primarily amateur operators assisted in times of disaster including such events as the sinking of the Titanic and the 1937 Ohio River flood, are also examined. |
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... sending it at ten words a minute or more, and receiving it and understanding it at an equal or even faster pace. Still more: they had to understand “Q Meanings” such as CQ, QRM, and QRN. And still more, amateurs had to understand the ...
... for the tubes to glow. He placed the earphones over his head and listened for the rushing sound of the receiver coming to life. Switching to transmit mode, he held the sending key down and checked the 5 1. The Beginnings.
... sending key and sent an answering call: VK7HL, VK7HL, DE W9FYK W9FYK W9FYK AR. (“DE” in telegraph usage means “from” and “AR” is the invitation to reply.) Over the waves came the station answering Forrest's call: W9FYK DEVK7HLR = TKS ...
... Sending Outfit.”6 The common image of the experimenter in the early 20th century is of a boy standing on the edge of the barn roof with an opened umbrella, prepared to float back to earth. Providing the lad survived the fall, he might ...
... sending code by way of sparks and made it happen? So did the young technician take the idea and set about building his own spark transmitter. He accomplished this as Forrest Bartlett, W9FYK, had done it, beginning with the wooden end of ...
Inhalt
1 | |
5 | |
2 Hiram Percy Maxim and the Relay Concept | 24 |
3 Amateurs During the First World War | 40 |
4 Amateurs Between War and Peace | 53 |
5 Surviving the Broadcast Revolution | 64 |
6 Relays DXing Strange Languages and Clubs | 80 |
7 Amateurs as Experimenters and Adventurers | 101 |
Phase Two | 169 |
Amateurs in Emergencies and Disasters | 181 |
19401945 | 200 |
19411950 | 211 |
Epilogue | 231 |
Appendix A Morse Code Alphabet | 237 |
Appendix B Q Signals and Other Abbreviations | 238 |
Appendix C Common Abbreviations in Amateur Morse Code | 240 |
8 The Olympics Worlds Fairs Trans Radio Press Service and
International Radio Conferences ... | 116 |
9 Adventurous Amateurs at Sea and in the Air | 130 |
The NC4 Byrd the Dolebirds the Lindberghs and Others | 140 |
Phase One | 154 |
Chapter Notes | 241 |
A Bibliographic Essay | 261 |
Index | 273 |
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The World of Ham Radio, 1901-1950: A Social History Richard A. Bartlett Keine Leseprobe verfügbar - 2015 |