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preamplifier, model 231
preamplifier, model 231

preamplifier, model 231

Inventory NumberRS1064
ClassificationAmplifier
Subject
    Maker Baird-Atomic Inc. 1956 - 1987
    Maker Radio Corporation of America 1919-present
    Cultural Region
      Place of Origin
        Dimensions9 x 18 x 6 cm, 1 lb. (3 9/16 x 7 1/16 x 2 3/8 in., 0.5 kg)
        Material
          DescriptionRectangular blue metal frame with rounded flat silver metal handle. Perforated U-shaped piece covers bottom half.
          Signedwritten in white on front: Baird / Atomic / PREAMPLIFIER / MODEL 231 / Baird-Atomic, Inc. / Cambridge, Mass. USA plate on side, on grate: BAIRD-ATOMIC INC. / CAMBRIDGE, MASSACHUSETTS, U.S.A. / MODEL 2312 SERIAL 355 / VOLTS CYCLES AMPS
          Inscribedstamped on front: B/A / 4
          FunctionThis apparatus converts an ionization charge to a step voltage pulse whose amplitude is proportional to the total charge collected in each event.
          -http://www.canberra.com/products/671.asp
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          Date: date 1952
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          Date: 1966-1967
          Object number: 1996-1-0454
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          Atomic Instrument Company
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          Baird & Tatlock (London) Ltd.
          Date: 1903-1915
          Object number: 0503c
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          Kelvin Bottomley & Baird Ltd.
          Date: circa 1910
          Accessories: mahogany case HUSUN catalogue (in instrument file)
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          electrophorus
          electrophorus
          Baird & Tatlock (London) Ltd.
          Date: 1903-1915
          Object number: 0503a
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          Baird & Tatlock (London) Ltd.
          Date: 1903-1915
          Object number: 0503b
          computer-plotted metabolic data charts
          computer-plotted metabolic data charts
          Atomic Accessories, Inc.
          Date: 1960-1964
          Object number: 2003-1-0068d
          computer-plotted metabolic data charts
          computer-plotted metabolic data charts
          Atomic Accessories, Inc.
          Date: 1960-1964
          Object number: 2003-1-0068e
          computer-plotted metabolic data charts
          computer-plotted metabolic data charts
          Atomic Accessories, Inc.
          Date: circa 1964
          Object number: 2003-1-0068b