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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?

Date1936
Inventory NumberVT0225
ClassificationVacuum Tube
Maker Cruft Laboratory, Harvard University founded 1914
Cultural Region
    Place of Origin
      Dimensions13.4 × 4.5 × 4.5 cm (5 1/4 × 1 3/4 × 1 3/4 in.)
      Description2 LEADS ONLY MANY TURNS VERY FINE WIRE
      FunctionExperimental
      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
      Object number: VT0219
      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
      shop-built split-anode magnetron
      shop-built split-anode magnetron
      Cruft Laboratory, Harvard University
      Object number: VT0233
      VTNBK 2/254
      shop-built UV-201? triode
      Cruft Laboratory, Harvard University
      Object number: VT1311
      Image Not Available for FIL TEST
      FIL TEST
      Cruft Laboratory, Harvard University
      Object number: VT2065
      Image Not Available for FIL TEST
      FIL TEST
      Cruft Laboratory, Harvard University
      Object number: VT2066
      Image Not Available for shop-built diode ??
      shop-built diode ??
      Cruft Laboratory, Harvard University
      Object number: VT0216
      VTNBK 6/794
      shop-built diode ??
      Cruft Laboratory, Harvard University
      Object number: VT0215
      VTNBK 2/268
      shop-built discharge tube?
      Cruft Laboratory, Harvard University
      Object number: VT1298