An Introduction to Variable Tuned Circuits

摘要

Of fund amental importance to our leisure time either listening or transmitting, is the humble tuned circuit at resonance. Our very existence as radio amateurs, the whole of the RSGB, the vast systems of world-wide radio communications, are totally dependent on the fact that when an inductor and a capacitor have equal and opposite reactances at a certain frequency, that circuit exhibits a phenomenon called resonance.