广播发射机高末发射管灯丝保护电路的改造

At the End of the Broadcast Transmitter High Tube Filament Protection Circuit Modification

大功率短波广播发射机高末级发射管,由于价格昂贵,长期以来属于发射机中贵重器件,无论是运行管理还是安装、使用和维护,都有一整套极其严格的要求和保障措施。本文简要介绍了SW-100F短波广播发射机高末电子管灯丝电路原理,针对发射机加高压、发射管加灯丝,发射机落高压、发射管降灯丝过程展开讨论和分析;从保障发射机稳定运行,提高和延长电子管使用寿命等方面,提出了对发射机落高压时,高末电子管灯丝保护电路的改造方案,并就改造过程的实施和成效进行了论述。

This paper briefly introduced the principle of the filament circuit of final electronic valve of SW-100 F shortwave radio transmitter. In order to improve the stability and working life of the valve, we put forward a modification scheme for the filament protection circuit and discussed the implementation of the modification and the results.