Before Ernst Alexanderson designed the high-frequency alternators that transmitted radio broadcasts in a continuous wave, radio was not usable over long distances. Tune in and learn more Stuff of Genius in this video podcast from HowStuffWorks.com. http://howstuffworks.com http://www.facebook.com/StuffofGenius http://itunes.apple.com/us/podcast/the-stuff-of-genius/
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