A rectangular-shaped deflection yoke, RTC (Round Core Tetra Coil Combined Deflection
Yoke) enhances deflection sensitivity of a cathode-ray tube. More specifically,
a deflection yoke structure for a cathode-ray tube is mounted with rectangular
shaped deflection coils and circular shaped ferrite cores, and the difference between
a maximum gap and a minimum gap for the deflection coil and the ferrite core is
greatest at an end section on a screen side of the ferrite core.
