Transfer standards have been developed for calibrating, at frequencies from 200 kc/s to 60 Mc/s, an admittance bridge which measures 0–100 millimhos and −150 μμF to +150 μμF. The standards have been used to give the bridge accuracies of about ± 2% ± 0.05 millimho in conductance, and between ± 0.2 μμF and ± 4 μμF in capacitance, depending on the conductance that is being measured at the same time. Suggestions are made for a new type of conductance standard that should make possible accuracies of better than ± 1 % in conductance, and better than ± 1 μμF in capacitance.

M.H. Oliver

Papers

H.F. resistance standards and their use in the calibration of an admittance bridge up to 60 Mc/s