The special point is found in frequency characteristics of one model of an oscillatory contour about which it wasn’t reported in scientific literature earlier. The point settles down at a frequency, the smaller resonant frequency of a contour. The module of an impedance doesn’t depend on the size of active resistance at this frequency. Physical interpretation of the phenomenon doesn’t exist at the moment. This article is continuation of the already research, results of calculations of existence region of the impedance module of an oscillatory contour are for the first time given in it and phase charts are provided. Two models of an oscillatory contour are considered. Existence region of the module of an impedance are essentially different for the considered models. Phase charts of an impedance are calculated depending on relative frequency. Results of research can be used in the electrician and the electronic engineer and manual for profound studying of electrical equipment.