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VTNBK 7/981
cold cathode triode
VTNBK 7/981

cold cathode triode

Date1937
Inventory NumberVT0736
ClassificationVacuum Tube
Maker Western Electric Company 1869 - 1995
Cultural Region
    Place of Origin
      Dimensions8.4 × 3 × 3 cm (3 5/16 × 1 3/16 × 1 3/16 in.)
      DescriptionEXT PAINTED BLACK. RADIUM BROMIDE 226 introduced 1952
      FunctionThree-element double-gap cold-cathode triode for relays, rectifiers, or voltage regulators. Opaque coating made for uniform breakdown voltage. Largest application in 1930s was selective ringing in multi-party telephones.
      Image Not Available for Cold Cathode Triode
      Cold Cathode Triode
      Western Electric Company
      Date: 1937
      Object number: VT2518
      Image Not Available for Cold-cathode gas-filled triode
      Cold-cathode gas-filled triode
      Western Electric Company
      Date: after 1939
      Object number: VT4068
      Image Not Available for Cold Cathode TRIODE
      Cold Cathode TRIODE
      Western Electric Company
      Date: 1937
      Object number: VT4062
      Image Not Available for Cold-cathode gas-filled triode
      Cold-cathode gas-filled triode
      Western Electric Company
      Date: after 1939
      Object number: VT4067
      WE 346A cold-cathode gas-filled triode tube
      WE 346A cold-cathode gas-filled triode tube
      Western Electric Company
      Date: after 1939
      Object number: VT0067
      aircraft bubble sextant
      aircraft bubble sextant
      Bausch & Lomb Optical Company
      Date: 1940-1945
      Accessories: cord, sighting tube.
      Object number: 2003-1-0167
      stoppered glass test tube of radium
      stoppered glass test tube of radium
      Theodore William Richards
      Date: circa 1900
      Object number: 4878
      X-ray Parts
      X-ray Parts
      Date: circa 1900
      Object number: 1998-1-0116
      unidentified mineral sample (radioactive)
      unidentified mineral sample (radioactive)
      American
      Date: 1890-1930
      Object number: 3928
      VTNBK 4/581
      diode
      Western Electric Company
      Date: 1941
      Object number: VT1066
      PULSE GAP
      PULSE GAP
      Western Electric Company
      Date: 1941
      Object number: VT1187
      Image Not Available for PULSE GAP
      PULSE GAP
      Western Electric Company
      Date: 1941
      Object number: VT2313