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CHL No. 836 Pioneer Electronics Research Laboratory - Santa Clara


NO. 836 PIONEER ELECTRONICS RESEARCH LABORATORY - This is the original site of the laboratory and factory of Federal Telegraph Company, founded in 1909 by Cyril F. Elwell. Here, Dr. Lee de Forest, inventor of the three-element radio vacuum tube, devised the first vacuum tube amplifier and oscillator in 1911-13. Worldwide developments based on this research led to modern radio communication, television, and the electronics age.


Channing Avenue and Emerson Street, Palo Alto (Along Sidewalk, Southeast Corner)
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Use old address "913 Emerson Street, Palo Alto, California 94301" can help you find the state plaque.

CHL #836 - Pioneer Electronics Research Laboratory Marker