Abstract
A decade of highly stable 10 Ω resistors employing a new method of construction is described. The bare manganin wires are wound on Pyrex glass tubes which are assembled in such a way as to permit annealing (at 420° C) and pickling of the whole assembly. The resistors are adjusted after being annealed, and are then pickled and sealed into a Pyrex glass envelope without being further disturbed. The lead resistance characteristics demanded by the balance equation for the Smith bridge (type 3) are discussed, and the calibration and use of the decade for checking the bridge are described.
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