Impedance Bridge With a 109 to 1 Range


    FOR measuring the impedances of a wide variety of coils used in electronic and communication apparatus the Bell Laboratories have designed a wide-range audio-frequency bridge, and a carrier-frequency bridge, about twenty-five of which have been constructed for the various manufacturing plants of the Western Electric Company. The bridges have been described in an article by H. T. Wilhelm (Bell Lab. Rec, 23, No. 3; March 1945).

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    Impedance Bridge With a 109 to 1 Range. Nature 156, 639–640 (1945).

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