Abstract: An electromagnetic lateral convergence assembly includes a generally-annular, planar magnetic core (optionally found as a laminate) having integral pole pieces extending toward the center of the annulus. Electrical coils are mounted on selected pole pieces for producing a convergence-compensating magnetic field within the center of the annulus. The coils are secured to a printed circuit board to hold the core in spaced parallel relationship to the board. Optionally a purity assembly including a planar magnetic core having a number of electrical coils for producing a rotatable, variable, linear field is mounted on the other side of the printed circuit board.

Abstract: A mounting arrangement for mounting scanning coil/yoke structures on the neck of an electron beam tube comprises in addition to position adjustment means for producing lateral displacement of the scanning coil/yoke structure on the neck of an electron beam tube along two mutually perpendicular axes as well as axial displacement of the structure along the tube neck, tilt adjusting means for producing tilt of the coil with respect to the axis of the tube neck and constructed and arranged to afford simultaneous lateral displacement and tilt of the coil structure relative to the tube neck axis to afford optimum convergence control taking into account mechanical limitations imposed by the tube neck on which the scanning coil is mounted.