54) has, as the bobbin (24a), the saddle shape. This coil (54) is shorter than the coil (24a); it surrounds the latter and has front flaps (55) and rear flaps (56) extending perpendicular to the axis of the tube. The magnetic shield 35a is disposed between the rear flap 27a of the bobbin 24a and the rear flap 56 of the bobbin 54. A ferrite core

摘要

A deviator associated with an autoconvergent color image tube is modified so that it may be used in combination with a tube of the same type, but having an image screen of smaller size, the horizontal and/or vertical deviation center being displaced. According to the invention, a magnetic screen is placed across the magnetic field lines produced by the vertical and horizontal deviation coils whereby the deviation centers are displaced without any modification of the coils.