全固态PDM中波发射机的防雷保护

Lightning- arresting Protection for All-solid PDM Medium Wave Transmitter

全固态PDM中波广播发射机由于全部采用了晶体管器件 ,整机效率比传统的电子管乙类屏调发射机提高了 2 5 %～ 30 % ,但由于晶体管器件对瞬态过电流、过电压的承受能力不及电子管 ,因此 ,全固态PDM中波广播发射机的抗雷击性能比较弱 。

Being all solid PDM medium wave broadcast transmitter use transistor devices, the total efficiency improve 25 %～30 % than traditional second kind anode modulated transmitters. But because of transistor devices endure in a moment over-current and over-voltage ability lowers than electron tubes, so the property of resisting lightning is weaker. The paper gives a detailed introduction about lightning- arresting measure to antenna and antenna tuning network.