Empire of the air: the men who made radio
Science and technology
Human-transcribed braille
Summary
Portrait of three American pioneers of radio--Lee de Forest, inventor of the vacuum tube; Edwin Howard Armstrong, creator of transmitter and amplification devices and the FM system; and David Sarnoff, who made RCA into a corporate giant. Chronicles the struggles… among these individuals, along with the development of radio from a primitive wireless communication system to its golden age in the 1930s and 1940s