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VTNBK 4/552
FIL TEST
VTNBK 4/552

FIL TEST

Inventory NumberVT0222
ClassificationVacuum Tube
Maker Cruft Laboratory, Harvard University founded 1914
Place of Origin
    Dimensions18.6 × 3.5 × 3.5 cm (7 5/16 × 1 3/8 × 1 3/8 in.)
    Description3 COLLINEAR ANODES CERAMIC SPACERS
    FunctionExperimental
    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
    VTNBK 4/624
    shop-built diode, multi-anode
    Cruft Laboratory, Harvard University
    Date: 1938
    Object number: VT0224
    experimental filament test tube
    experimental filament test tube
    Cruft Laboratory, Harvard University
    Date: 1938
    Object number: VT0218
    experimental diode tube
    experimental diode tube
    Cruft Laboratory, Harvard University
    Date: 1938
    Object number: VT0217
    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
    Image Not Available for FIL TEST
    FIL TEST
    Cruft Laboratory, Harvard University
    Object number: VT2069
    Image Not Available for FIL TEST
    FIL TEST
    Cruft Laboratory, Harvard University
    Object number: VT2067
    Image Not Available for FIL TEST
    FIL TEST
    Cruft Laboratory, Harvard University
    Object number: VT2065