Conclusions
The above methods, especially those with the T-type circuits, may prove useful in studying coils, in testing, etc., for instance, in certifying coils used for checking the corresponding parameters of bridges (or Q-meters). They can also be used for evaluating losses in ferrites, ferromagnetic materials and other substances.
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Livshits, É.S. Methods for measuring the Q-factor (or resistance) of induction coils at audio frequencies. Meas Tech 7, 411–417 (1964). https://doi.org/10.1007/BF00980390
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DOI: https://doi.org/10.1007/BF00980390