The existence of a mode of periodic movement of the volumetric charge of a negative sign from an electrode with negative potential (600 − 4500 V ) in the direction of other earthed electrode was discovered. The experiments were carried out with the discharge of a constant current in the presence of the pressure of air (10−3 ÷10) Torr in tubes with various internal diameter (3.8; 6.6; 15.5; 20.1; 25.8 mm), but with identical (510 mm) distance between electrodes. The opportunity of appearance of a mode of the periodic discharge was provided with connection to a potential output of a source of several condensers of large capacity (300 μF ). Is supposed, that the discovered periodic mode of the gas discharge is similar to the Gann effect − movement of the volumetrically charge of a negative sign at volume of the semiconductor.