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Image Not Available for shop-built FIL TEST
shop-built FIL TEST
Image Not Available for shop-built FIL TEST

shop-built FIL TEST

Inventory NumberVT0219
ClassificationVacuum Tube
Maker Cruft Laboratory, Harvard University founded 1914
Cultural Region
    Place of Origin
      Dimensions16.4 × 3.5 × 3.5 cm (6 7/16 × 1 3/8 × 1 3/8 in.)
      Description3 COLLINEAR ANODES CERAMIC SPACERS
      FunctionExperimental
      VTNBK 4/552
      FIL TEST
      Cruft Laboratory, Harvard University
      Object number: VT0222
      VTNBK 4/550
      shop-built FIL TEST diode
      Cruft Laboratory, Harvard University
      Object number: VT0220
      VTNBK 4/624
      shop-built FIL TEST diode
      Cruft Laboratory, Harvard University
      Date: 1938
      Object number: VT0223
      VTNBK 4/624
      shop-built diode, multi-anode
      Cruft Laboratory, Harvard University
      Date: 1938
      Object number: VT0224
      VTNBK 5/654
      shop-built FIL TEST
      Cruft Laboratory, Harvard University
      Date: 1929
      Object number: VT0227
      VTNBK 5/654
      shop-built FIL TEST
      Cruft Laboratory, Harvard University
      Date: 1929
      Object number: VT0228
      Image Not Available for shop-built FIL TEST?
      shop-built FIL TEST?
      Cruft Laboratory, Harvard University
      Date: 1936
      Object number: VT0225
      experimental filament test tube
      experimental filament test tube
      Cruft Laboratory, Harvard University
      Date: 1938
      Object number: VT0218
      VTNBK 5/646
      shop-built diode
      Cruft Laboratory, Harvard University
      Date: 1929
      Object number: VT0200
      VTNBK 6/831
      shop-built diode
      Cruft Laboratory, Harvard University
      Date: 1922
      Object number: VT0199
      Image Not Available for shop-built diode
      shop-built diode
      Cruft Laboratory, Harvard University
      Date: 1925
      Object number: VT0201
      VTNBK 5/642
      shop-built diode
      Cruft Laboratory, Harvard University
      Date: 1925
      Object number: VT0202