Lee de Forest
Lee de Forest
Born: 1873Birthplace: Council Bluffs, Iowa
Audion amplifier—De Forest inserted a third electrode between the cathode and anode to make his audion tube. Radio signals are picked up by connecting an antenna to the tube's grid. (1977)
Died: 1961| John Deere | The National Inventors Hall of Fame | Robert Heath Dennard |
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