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  2. Tung-Sol - Wikipedia

    en.wikipedia.org/wiki/Tung-Sol

    In 1941, radio tubes continued being sold to radio broadcast stations as R. E. Carlson was vice-president in Charge of Sales during this time. [14] Circa 1948, there was a picture of the Tung-Sol Factory at the corner of High Street and Eighth Avenue by Thomas Pallante located in the Newark Public Library.

  3. R. L. Drake Company - Wikipedia

    en.wikipedia.org/wiki/R._L._Drake_Company

    The company was founded in 1943 by radio design engineer Robert L. Drake. The company began as a manufacturer of low pass and high pass filters for the government and amateur radio market, and after World War II, produced amateur radio transmitters and receivers and communications receivers for maritime mobile service.

  4. EL84 - Wikipedia

    en.wikipedia.org/wiki/EL84

    In common with all 'E' prefix tubes, using the Mullard–Philips tube designation, it has a heater voltage of 6.3V. It can produce 17W output in Class AB1 in push–pull configuration. Many guitar-amplifiers routinely run EL84 tubes in excess of 400VDC, with the Traynor Guitarmate reportedly putting out 25W RMS with 2 EL84s in a push–pull ...

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  6. Amphenol - Wikipedia

    en.wikipedia.org/wiki/Amphenol

    Amphenol was founded in Chicago in 1932 by entrepreneur Arthur J. Schmitt, whose first product was a tube socket for radio tubes (valveholder bases). [6] Amphenol expanded significantly during World War II, when the company became the primary manufacturer of connectors used in military hardware, including airplanes and radios.

  7. Swan Electronics - Wikipedia

    en.wikipedia.org/wiki/Swan_Electronics

    Swan merged with Cubic Corporation in 1967, and Johnson managed Swan as its subsidiary until 1973. Johnson founded Atlas Radio in 1974. Atlas produced smaller solid state radios for mobile communications from vehicles of all types. [3] Many Swan radios remain in service today, restored and operated by vintage amateur radio enthusiasts. [2]

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  9. Rogers Vacuum Tube Company - Wikipedia

    en.wikipedia.org/wiki/Rogers_Vacuum_Tube_Company

    The new company controlled Rogers Radio Tube Company and Rogers Batteryless Radio Company. Joseph Elsworth Rogers (1898–1960), brother of Edward Rogers, was an important member of the company and served as vice-president until 1939, and then as head from 1939 to 1960.