Lee de Forest
|Caption||Lee de Forest. Long distance wireless transmission became possible with the improvement made to the radio valve by Lee de Forest in 1906. Here are four versions of his valve. De Forest is shown below with the transmitter he used in 1906 to broadcast the voice of the famous tennor, Enrico Caruso.|
|Artwork medium||Printed material|
|Copyright notice||© Look and Learn|
|Keywords||Lee de Forest radio valves communications engineer inventor technology|
|Image ref||Maximum size available||Views|
|B001365||4,257 x 3,758 pixels||627|
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