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impedance bridge 650-A
impedance bridge 650-A

impedance bridge 650-A

Datec. 1930
Inventory NumberRS0248
ClassificationBridge
Subject
    Maker General Radio Company 1915-present
    Cultural Region
      Place of Origin
        Dimensions22 x 31 x 52 cm (8 11/16 x 12 3/16 x 20 1/2 in.)
        Material
          DescriptionA General Radio type 650-A, serial number 2766, impedance bridge, mounted in a walnut cabinet with slanted bakelite front/knobs and metal as well as glass fixtures.
          Signedetched and white filled on front panel: IMPEDANCE BRIDGE / TYPE 650-A SERIAL NO. 27666 / GENERAL RADIO CO. / CAMBRIDGE, MASS. on face of meter: WESTON ELEC. INST. CORP. NEWARK, N.J., U.S.A. / GALVANOMETER / GENERAL RADIO CO. / M'F'D BY / WESTON / MODEL 301 NO. 81922 / 65 (Greek letter omega) NORMAL TYPE 588-306-A
          Inscribedstamped in white on top panel: GOV. 3109
          FunctionPossible function: The TYPE 650-A Impedance Bridge will measure direct-current resistance over 9 decades from 1 m0 to 1 MO, inductance over 8 decades from 1 uh to 100h, with an energy, factor (Q = wL/R)up to 1000, capacitance over 8 decades from 1 uuf to 100 uf, with a dissipation factor (D = RwC) up to unity.
          www.teradyne.com/corp/grhs/pdf/grx/GRX1933AprMay.pdf

          Also see: http://www.jptronics.org/radios/GR/GR650.pdf
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