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众所周知,在彩色电视机中用消磁电阻和消磁线圈构成消磁电路,每次开机瞬间自动对显象管进行消磁,以保证图像的色纯度。笔者在实践中根据自由衰减振荡电路原理,由一只电容器与消磁线圈构成L——C谐振电路,取得很好的消磁效果,现介绍如下。 电路构成见图1,图中R、D、C是新增的三个元件。二级管D为1A/400V。(IN4007型为好),R为600KΩ/0.25W炭膜电阻,C为400V/2μF涤纶电容
As we all know, in the color television set with degaussing degaussing degaussing coils and demagnetizing circuit, each boot moment automatically degaussing the picture tube to ensure the color purity of the image. In practice, according to the principle of free attenuation oscillating circuit, the author constructs L - C resonant circuit by a capacitor and demagnetizing coil and achieves good demagnetization effect as follows. Circuit structure shown in Figure 1, the figure R, D, C is the new three components. Diode D is 1A / 400V. (IN4007 type is good), R is 600KΩ / 0.25W carbon film resistor, C is 400V / 2μF polyester capacitor