Episode January 22, 2025 18 min 32s

Early FM Radio: Incremental Technology in Twentieth-Century America

This excerpt from Early FM Radio examines the history of frequency modulation (FM) radio in 20th-century America, challenging the conventional narrative that credits Edwin Howard Armstrong with its sole invention. The text traces FM's development through various stages, highlighting the contributions of numerous engineers and companies like RCA and Westinghouse, emphasizing the role of social and technological contexts in shaping the technology's evolution. It explores the interplay between amplitude modulation (AM) and FM, detailing technical challenges and innovations. The book also analyzes the complex relationship between Armstrong and RCA, their collaborative and competitive efforts, and the eventual commercial success of FM broadcasting. Finally, the text argues that FM radio's development was a collaborative, incremental process influenced by both scientific discoveries and societal factors.

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