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The Perham Collection of Early Electronics
at History San José
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Welcome to the Perham Collection of Early Electronics at History San José
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Bay Area Early Electronics: A Brief History
The Dawn of Wireless in the San Francisco Bay Area
Radio Into the Air and Across the Oceans
“On The Air, Everywhere” — The Growth of Radio and Television Broadcasting
Post-War Pioneers
People & Companies
Lee de Forest
De Forest’s Audion tube
De Forest “Responder” (electrolytic detector)
De Forest RJ4 Detector
De Forest Wireless “Everyman” Radio Receiver
Eitel-McCullough, Inc. (EIMAC)
Harold Elliott
1924 Olympian Clarida Hunsberger, Captured on Film by Harold Elliott
Lloyd Espenschied
Philo Farnsworth
Federal Telegraph Company
Federal at Home in Palo Alto
William W. Hanscom
Ralph Heintz
Heintz & Kaufman Gammatron
Charles “Doc” Herrold
Station KQW equipment
Sybil (Herrold) True
Jo Jennings
Leo Jones
Fargo
John Kaar
The Colin B. Kennedy Company
Charles Litton
Thorn Mayes
Jane Morgan
Processing the Jane Morgan Papers
Douglas Perham
Perham at the Mike
Seefred Brothers
Royden Thornberg
The Technology
The Westinghouse “Stopper” Lightbulb
Early Wireless and Radio Broadcasting Technology
De Forest’s Audion tube
De Forest “Responder” (electrolytic detector)
De Forest RJ4 Detector
De Forest Wireless “Everyman” Radio Receiver
Heintz & Kaufman Gammatron
Station KQW equipment
The Echophone
Marine and Mobile Radio
High Power and Microwave Technology
EIMAC high-power transmitters and klystrons
Varian Klystrons
Sound Recording & Reproduction
Ampex Model 200 prototype reproduce head
Hewlett-Packard 200A and 200B Oscillators
Surveillance and Counter-Surveillance Technology
Cryptext CX-II Data Encryption Device
Fargo
Computing and Gaming
Glossary
Vacuum Tubes: Definition
Transmitters: Definition
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Fargo F-604 Intelligence Receiver
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Fargo