Color picture tube apparatus

A color picture tube apparatus, comprising a cathode ray tube and a deflection yoke that is disposed so as to surround the exterior of the cathode ray tube, in which three electron beams emitted from an electron gun are deflected by a horizontal deflection magnetic field and a vertical deflection magnetic field of the deflection yoke to form a color image on a screen,

• wherein the deflection yoke comprises a horizontal deflection coil, a vertical deflection coil, and a ferrite core,
• the ferrite core is divided into an upper core and a lower core, and
• the vertical deflection coil is toroidally wound around each of the upper core and the lower core,
• when an axis that passes through a tube axis of the cathode ray tube and extends in a vertical direction of the screen is taken as the Y axis, and an axis that passes through the tube axis and extends in a horizontal direction of the screen is taken as the X axis,
• and when the ferrite core is viewed from the screen side, when a coil of the vertical deflection coil that is wound around a region located at the left of the Y axis and above the X axis is taken as an upper core left coil, a coil of the vertical deflection coil that is wound around a region located at the right of the Y axis and above the X axis is taken as an upper core right coil, a coil of the vertical deflection coil that is wound around a region located at the left of the Y axis and below the X axis is taken as a lower core left coil, and a coil of the vertical deflection coil that is wound around a region located at the right of the Y axis and below the X axis is taken as a lower core right coil,
• the upper core left coil and the upper core right coil are separated via a first intermediate tap, and the lower core left coil and the lower core right coil are separated via a second intermediate tap, and
• a variable resistor that is connected to at least either of the first or second intermediate tap is provided.