[en] A method for improving the loading characteristic of a single-gap drift chamber by selecting ''true'' coordinates before their recording is described. It is suggested to use two identical drift chambers mounted on the minimum distance in parallel. The difference between the drift times in the chambers is a linear function of the coordinate of the particle passing. For the difference compensation in the drift velocities a varactor variable delay line is used. The gain from the utilization of this method can be estimated by the following expression m approximately Δtsub(max)/2r, where m is a ratio of a number of events recorded without utilization of the device and with it, Δtsub(max) is the maximum drift time difference; 2r is a resolution time of the coincidence circuit. Two double-coordinate chambers with the drift gap of 50 cm, mounted in the total gas volume at the 8 cm distance from each other were used for verification of the method suggested. The Ar+5% CO₂ gas mixture was used. When the field intensity changes from 200 to 360 V/cm, the drift velocity changes linearly, which permits to establish the necessary difference in velocities. The chambers had the spatial resolution of 0.7 mm (FWHM) for the X=1 cm coordinate and 1.7 mm for X=50 cm. The 50 ns time resolution corresponded to the coordinate resolution of 1.7 mm. The gain in the background suppression is 2.5, which corresponds to the results estimated according to the above formula