In this paper, the failure analysis of a type of high frequency power transistor is introduced.

介绍了对某型号高频大功率晶体管进行的失效分析。

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Analysis based on the failure characteristics indicates that the nylon gum on bottom of dovetail and the long term operation can significantly reduce the natural frequency of blade.

故障分析表明：经长期使用的叶片在修理厂大修时，为满足叶片摆动量要求在榫头底面涂尼龙胶，会使叶片自振频率有较大幅度下降；

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