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Sylvania SY227 triode tube
Sylvania SY227 triode tube

Sylvania SY227 triode tube

Date1927
Inventory NumberVT1396
ClassificationVacuum Tube
Maker Sylvania Products Company 1924 - 1931
Maker Sylvania 1924-present
Cultural Region
    Place of Origin
      Dimensions11.2 × 4.5 × 4.5 cm (4 7/16 × 1 3/4 × 1 3/4 in.)
      Material
        DescriptionDWG SHOWS CHAMPION UY-227.
        Triode, slightly silvered glass envelope, bakelite 5 pin base.
        Signedetched on base: 2 SYLVANIA / D SY-227
        Inscribedraised lettering on base: LICENSED ONLY TO EXTENT / INDICATED ON CARTON
        Eveready Raytheon ER227 triode tube
        Eveready Raytheon ER227 triode tube
        Raytheon Manufacturing Company
        Date: 1929-1933
        Object number: VT1393
        Northern MY227.triode
        Northern MY227.triode
        Northern Manufacturing Company
        Date: 1927
        Object number: VT1400
        Sylvania SY485 triode tube
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        Date: 1928-1930
        Object number: VT0767
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        Sylvania Products Company
        Date: 1925-1929
        Object number: VT0765
        Sylvania 71A power triode tube
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        Sylvania Products Company
        Date: 1926
        Object number: VT0432
        Sylvania SX199 triode tube
        Sylvania SX199 triode tube
        Sylvania Products Company
        Date: 1925
        Object number: VT1427
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        Sylvania SV199 triode tube
        Sylvania Products Company
        Date: 1925
        Object number: VT1436
        Sylvania 227 triode tube pumped and mercury-filled for experiment
        Sylvania 227 triode tube pumped and mercury-filled for experiment
        Sylvania Products Company
        Date: 1930
        Object number: VT1306
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        Sylvania SX232 sharp cut-off tetrode tube
        Sylvania Products Company
        Date: circa 1930
        Object number: VT1416
        Sylvania SX226 triode tube
        Sylvania SX226 triode tube
        Sylvania Products Company
        Date: circa 1925
        Object number: VT1418
        Sylvania 6C4 high frequency triode tube
        Sylvania 6C4 high frequency triode tube
        Sylvania Electric Products, Inc
        Date: 1950-1960
        Object number: VT0010
        Sylvania VG1A hot-cathode ionization gauge tube
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        Sylvania Electric Products, Inc
        Date: circa 1950
        Object number: VT1604