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Calvert 3HQ5 triode?
Calvert 3HQ5 triode?
© Collection of Historical Scientific Instruments, Harvard University

Calvert 3HQ5 triode?

Date1966
Inventory NumberVT1846
ClassificationVacuum Tube
Maker Calvert Electronics Inc.
Cultural Region
    Place of Origin
      Dimensions5.3 × 1.5 cm (2 1/16 × 9/16 in.)
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      Columbia Electronics Sales Company, Div. of Columbia Broadcasting System, Inc..
      Object number: VT4842
      vt4841.12BY7A.pdf
      12BV7 SCO pentode
      Columbia Electronics Sales Company, Div. of Columbia Broadcasting System, Inc..
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      Coulter counter
      Coulter counter
      Coulter Electronics, Inc.
      Date: 1961-1970
      Object number: 2003-1-0104b
      Coulter channelyzer
      Coulter channelyzer
      Coulter Electronics, Inc.
      Date: circa 1972
      Object number: 2003-1-0104a
      Coulter channelyzer
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      Date: circa 1972
      Object number: 1999-1-0090a
      Regency Monitoradio type MR-33-B FM radio receiver
      Regency Monitoradio type MR-33-B FM radio receiver
      Regency Electronics Inc.
      Date: circa 1968
      Object number: RS0035
      10db coupler #900-15, Meca Electronics Inc., 1.1 to 1.5GHZ
      10db coupler #900-15, Meca Electronics Inc., 1.1 to 1.5GHZ
      Meca Electronics Inc.
      Object number: RS1061
      accessory parts for Coulter counter and Coulter channelyzer
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      Coulter Electronics, Inc.
      Date: circa 1972
      Object number: 1999-1-0090c
      Image Not Available for Coulter Counter
      Coulter Counter
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      Date: circa 1970
      Object number: 1999-1-0090b
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      Hamner Electronics Company, Inc.
      Object number: RS1008
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      Hamner Electronics Company, Inc.
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