[en] Some plasma filament equilibrium problems in the TO-2 racetrack tokamak are considered. The paper is of practical character, so all calculations have finite numerical results and concrete recommendations. Measurement procedures are presented. Calculations and measurements on the model allowed to choose correction and control winding geometry and determine their parameters. The vortical winding location on the magnetic circuit is determined. Real configuration of the device magnetic circuit is taken account of. Disregard of magnetic circuit effect on plasma filament equilibrium is the cause of considerable mistakes and is found to be inadmissible