Abstract
Recently saddle-saddle type deflection yoke (DY) becomes the major trend for Display CRT. So, we have studied over the activity of ferrite core used in saddle-saddle type DY. The initial permeability of ferrite core used in deflection yokes is generally about 350. Though this experiment by changing the initial permeability from MnMgZn ferrite to Ni Zn ferrite, we studied the direction how to improve the accuracy of ferrite core dimension by lowering the initial permeability to be able to use in the deflection yokes.As the result, if the ferrite cores for saddle-saddle type deflection yoke have at least more than 100 value of initial permeability, the practical performance can be obtained.
