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True RMS voltmeter
True RMS voltmeter

True RMS voltmeter

Datecirca 1970
Inventory Number2003-1-0169
ClassificationVoltmeter
Subject
    Maker Ballantine Laboratories, Inc. 1934-present
    Place of Origin
      Dimensions16.7 × 19.5 × 15 cm (6 9/16 × 7 11/16 × 5 7/8 in.)
      Material
        DescriptionElectronic voltmeter 1mv - 300V fullscale, 50Hz - 20MHz,Measures true RMS (Root Mean Square) value of AC voltage
        Inscribed"SINGER/BALLANTINE TRUE RMS VOLTMETER"
        Curatorial RemarksQuarantined for possible pest infestation 09/06/03 Removed from quarantine 09/16/03
        True RMS Voltmeter
        True RMS Voltmeter
        Ballantine Laboratories, Inc.
        Date: circa 1945
        Object number: WJ0310
        Image Not Available for true RMS voltmeter
        true RMS voltmeter
        Ballantine Laboratories, Inc.
        Object number: WJ0649
        True RootMean Square Voltmeter
        True RootMean Square Voltmeter
        Ballantine Laboratories, Inc.
        Object number: WJ0375
        electronic A.C. voltmeter
        electronic A.C. voltmeter
        Ballantine Laboratories, Inc.
        Date: 1947-1960
        Accessories: one small plastic card: "Use the Ballantine voltmeter. . .".
        Object number: 2006-1-0065
        SH Choke, 0.033 Henries, 7A D.C., 1789 V RMS
        SH Choke, 0.033 Henries, 7A D.C., 1789 V RMS
        Submarine Signal Company
        Object number: RS1165
        Voltmeter, electronic
        Voltmeter, electronic
        Ballantine Laboratories, Inc.
        Object number: WJ0563
        Voltmeter, Electronic
        Voltmeter, Electronic
        Ballantine Laboratories, Inc.
        Object number: WJ0582
        "The Ballantine Rule" slide chart for calculating voltage decibels
        "The Ballantine Rule" slide chart for calculating voltage decibels
        Ballantine Laboratories, Inc.
        Date: copyright 1953
        Accessories: Instruction booklet, see 1998-1-1372b
        Object number: 1998-1-1372a
        AC Voltmeter
        AC Voltmeter
        Heath Company
        Date: circa 1970
        Object number: 2003-1-0173
        box containing capacitors and condensers for radio work
        box containing capacitors and condensers for radio work
        Date: late 19th-early 20th Century
        Object number: RS0294
        instructions for using "The Ballantine Rule"
        instructions for using "The Ballantine Rule"
        Ballantine Laboratories, Inc.
        Date: copyright 1953
        Accessories: "The Ballantine Rule," see 1998-1-1372a
        Object number: 1998-1-1372b
        control console from Harvard Cyclotron Laboratory
        control console from Harvard Cyclotron Laboratory
        Harvard Cyclotron Laboratory
        Date: 1947-2002
        Object number: 2003-1-0291