The circuit models, formulas, and a computer program in BASIC language are given for calculating the efficiency, frequency response, and complex impedance of a magnetic recording or reproducing head. The model and the calculations take into account the effects of the complex permeability of the elements: a core of nonhomogeneous laminations of specified thickness and geometry; a front gap with nonconducting or conducting gap spacer; gap stray permeance; and a read gap. Measurements presented on eight different heads prove the model and the calculations.
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https://aes2.org/publications/elibrary-page/?id=3222
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