发射机的故障可分为振荡不稳和不振荡两类。振荡不稳具有随机性，原因较繁杂，如传输波导内潮湿、点火脉冲不稳、高压部分打火、放电管及磁控管的衰老等等。因此在修理这类故障时，要进行全面认真的分析检查，灵活运用各种方法，缩小故障范围。本文以不振荡为例对发射机的修理 Transmitter failures can be divided into two types of oscillation instability and non-oscillation. Oscillation instability with randomness, more complicated reasons, such as the transmission waveguide wet, unstable ignition pulse, part of high pressure ignition, discharge and magnetron aging and so on. Therefore, in the repair of such failures, we must conduct a comprehensive and careful analysis and inspection, flexible use of various methods to narrow the scope of the fault. In this paper, the case of non-oscillation on the transmitter repair