In a televison picture tube deflection apparatus a gullwing distortion correction signal (V gc ) and a north-south pincushion distortion correction signal (V pc ) are generated and then summed to form a sum signal (V gp ). The sum signal is coupled to a primary winding (W₁) of a transformer (T). A secondary winding (W₂) of the transformer (T) is coupled in a current path of a vertical rate deflection current (i V ) for modulating the deflection current in a manner that reduces the gullwing and north-south pincushion distortions. The secondary winding (W₂) is included in a resonant circuit (63) that is tuned to resonate at the horizontal frequency.