[en] Experimental results are presented on the dynamic behavior of self-organized reactive components in a single-ended Q-machine. In our case this component is the periodically forming double layer (DL) which is an essential part of the strong instability that appears when the cold plate (CP) of the Q-machine is positively biased with respect to the plasma source. This can either be the hot plate (HP) or a virtual plasma source, and the self-excited low-frequency oscillation is well known as potential relaxation instability (PRI). The DL possesses a certain capacity (C) which together with an inductance (L) in the outer circuit is able to form an LC oscillation circuit. (author)