A radio-frequency permeameter

Abstract

An ins trument is describe d , which , in connectio n with commercially available impeclance me a~urin g devices, is capable of meas urin g the permeability and losses in ferromagnetic to roldal cores. The m easurement is made by inse rting a to roidal core into the short-circuited secondar y of a transformer whose primary is attached to a radio-fre quen cy brid ge or Q mcter.