Quality factor measurements of air-cored solenoids at overtone frequencies

Although Tesla transformers and helical cavity filters are employed in quite different technical areas, a previous contribution demonstrated that applying the techniques used in designing these filters to the secondary winding configurations of a Tesla transformer improved the spectral purity of the output. In the present reported work, measurements of the quality factors of the original and a number of modified secondary windings are shown to provide results at the fundamental and overtone frequencies, thereby illustrating the scale of the possible benefits that can be achieved.