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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
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  • 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
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    • Federal Telegraph Company
      • Federal at Home in Palo Alto
    • William W. Hanscom
    • Ralph Heintz
      • Heintz & Kaufman Gammatron
    • Charles “Doc” Herrold
      • Station KQW equipment
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      • Fargo
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      • Processing the Jane Morgan Papers
    • Douglas Perham
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    • 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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F-332 Audio Interceptor

Fargo Law Enforcement equipment, the F-332 Audio Interceptor

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Posted on September 1, 2015September 1, 2015Full size 640 × 370

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