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The Perham Collection of Early Electronics

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      • 1924 Olympian Clarida Hunsberger, Captured on Film by Harold Elliott
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    • 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
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      • The Echophone
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      • Fargo
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      • Vacuum Tubes: Definition
      • Transmitters: Definition
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Heintz & Kaufman Gammatron Type 354

Heintz & Kaufman Gammatron 354

Heintz & Kaufman Gammatron Type 354, c. 1936 (Gift of Victoria Stone Velsey)

Posted on June 5, 2017June 5, 2017Full size 1798 × 3973

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Published inHeintz & Kaufman Gammatron Type 354
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