Radio Marvels

Explores the early history and technology of electronic communications through projects and experiments, combining a history of the wireless telephone and crystal receivers with easy-to-build, hands-on projects. The author demystifies the earth telephone and other communication oddities.

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This work explores the early history and technology of electronic communications through projects and experiments. It combines a history of the wireless telephone and crystal receivers with easy-to-build, hands-on projects, providing a practical introduction to the early technology of wireless communication. In addition to including innovative projects and experiments that enable readers to test alternative electrical communications theories, Ford demystifies the earth telephone, geological "blind spots" that prevent reception, delayed radion echoes, the "singing" crystal detector and other communication oddities. This book provides a useful resource for students aged 10 and up who are looking for interesting and unusual ideas for science-fair projects. It should also be of interest to electronics hobbyists and shortwave radio enthusiasts.