Skip to main content
Advanced Search
VTNBK 7/940
magnetic alkaline rectifier
VTNBK 7/940

magnetic alkaline rectifier

Date1924
Inventory NumberVT1780
ClassificationVacuum Tube
Maker Raytheon Manufacturing Company founded 1925
Cultural Region
    Place of Origin
      Dimensions22.5 × 3.5 × 3.5 cm (8 7/8 × 1 3/8 × 1 3/8 in.)
      DescriptionMAGNETIC ALKALIE RECTIFIER
      VTNBK 7/956
      diode?
      Raytheon Manufacturing Company
      Date: 1923
      Object number: VT1796
      Raytheon 25Z5GT rectifier voltage doubler tube
      Raytheon 25Z5GT rectifier voltage doubler tube
      Raytheon Manufacturing Company
      Date: 1933
      Object number: VT0105
      VTNBK 7/950
      rectifier?
      Raytheon Manufacturing Company
      Date: 1929
      Object number: VT1786
      Label found with VT1805
      FW rectifier?
      Raytheon Manufacturing Company
      Date: 1929
      Object number: VT1805
      VTNBK 7/943
      rectifier?
      Raytheon Manufacturing Company
      Date: 1925
      Object number: VT1783
      rectifier
      rectifier
      Kelley-Koett Manufacturing Company, Inc.
      Date: circa 1935
      Object number: VT4749
      rectifier
      rectifier
      Kelley-Koett Manufacturing Company, Inc.
      Date: before 1917
      Object number: VT4753
      VTNBK 5/671
      Raytheon CC rectifier
      Raytheon Manufacturing Company
      Object number: VT0355
      VTNBK 2/263
      CC rectifier
      Raytheon Manufacturing Company
      Object number: VT0970
      Image Not Available for HW CC rectifier
      HW CC rectifier
      Raytheon Manufacturing Company
      Date: 1934
      Object number: VT1441
      Image Not Available for CC rectifier
      CC rectifier
      Raytheon Manufacturing Company
      Object number: VT1555
      Image Not Available for HW Hg rectifier
      HW Hg rectifier
      Raytheon Manufacturing Company
      Date: 1950
      Object number: VT0509