Deflection yoke

A convergence apparatus for a color cathode ray tube in which multiple electron beams arranged in line are formed, comprising:

• a horizontal deflection coil;
• a convergence coil;
• and
• a variable transformer, the convergence coil being connected to the horizontal deflection coil through the variable transformer;
• wherein the variable transformer comprises:
• a first coil and a second coil wound coaxially around a magnetic core with respect to a movable axis of the magnetic core, one of said first coil and said second coil being formed of a plurality of coils;
• wherein the coils of said plurality of coils are separated from each other along the movable axis, and are connected to each other so as to produce mutual inductance which is negative with respect to each other.