Abstract: A deflection coil for a cathode ray tube having spaced apart first and second coil sections with longitudinally extending winding elements, wherein said elements each define a first portion formed with a given winding density and a second end portion thereof being formed with a lesser winding density, said portions of given and lesser winding density of both coil sections being respectively arranged at corresponding ends of said coil.

Abstract: In a picture display tubes having deflection angles of 110.degree. and more the conical central part near the transition to the neck has a substantially flat variation perpendicular to the tube axis. As a result of this an accurate positioning of the deflection device on the display tube is seriously hampered. This problem is solved by centering members which are present on the conical central part and which cooperate in a self-centering manner with centering members forming part of the supporting cage of the deflection device. The position of the deflection device in the axial direction is accurately fixed by abutment members forming part of the supporting cage in co-operation with abutment surfaces forming part of the envelope of the tube.