Abstract: The invention relates to a deflectional system of a television set comprising a power transistor and a driving circuit which supplies a deflection current increasing in ramp-shaped manner to a deflection coil. The driving circuit is periodically fed with switching-on pulses of a duration corresponding to the ramp length of the deflecting current. The driving circuit applies an increasing switched-on base current to the power transistor during the switching-on pulse duration, said switched-on base current driving the power transistor into the saturation state during substantially the entire switching-on pulse duration. After termination of the switching-on pulse, the driving circuit controls the power transistor with a switching-off base current which rapidly decreases in relation to the increase of the switched-on base current and finally changes polarity and which effects a rapid return of the power transistor from the saturation state into the blocking state.