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在宽带元器件的研制中,扫频测试系统是必不可少的。80年年中我厂多种新品研制中都急待使用的一台2公分扫频讯号源坏了,影响了研制工作的进展。经检查发现原电路结构设计不合理,造成控制极电路与地打火,2580伏高压直接加到了返波管的阴极和控制极间,以致在修理中连续烧毁二只2公分返波管。其中一只除阴极连接带烧断外,控制极连接带也烧断两处。另一只则灯丝烧断(因原电路设计中使阴极电流流经灯丝)。2公分返波管是禁运物资,国内生产的管子每只价格高达13000元,
In the development of broadband components, frequency sweep test system is essential. 80 years mid-year I plant a variety of new product development are in urgent need of a 2 cm signal source is broken, affecting the progress of research and development work. The inspection found that the original circuit structure design is unreasonable, causing the control circuit and the ground ignition, 2580 volts directly added to the back-wave tube cathode and control pole, resulting in the repair of two consecutive 2-second burnback tube. In addition to one of the cathode junction with the blow, the control pole also blown two. The other is the filament blown (due to the original circuit design so that the cathode current through the filament). 2 cm backwave tube is the embargo material, the domestic production of the pipe up to 13,000 yuan each price,