The invention provides a deflection yoke comprising: a tube-shaped core made
of a magnetic material that has on its inner wall, ridges each of which extends
along the CRT axis direction, the ridges being arranged circumferentially at intervals
and thereby forming slots; a vertical deflection coil wound so that part of its
length is disposed in the slots; and a horizontal deflection coil wound so that
part of its length is disposed in the slots, wherein the slots include (a) first
slots in which one of the horizontal deflection coil and the vertical deflection
coil is disposed and (b) second slots in which both of the deflection coils are
disposed, and the bottom of each first slot is, for part or all of the length of
the slot, closer to the external surface of the evacuated envelope than the bottom
of each second slot is.
