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我局和原中广局设计室合作,由南京1014研究所加工,于1979年上半年在国内第一次研制成75Ω/24:50Ω阻抗变换器。自1980年1月正式投入播出使用,先后经1kw和10kw彩色电视发射机播出使用至今已有13个冬夏,经历了夏季酷署和雷雨,冬天寒风和雪衰,电气性能一直稳定优良。密封性能良好,共播出70000小时·从未发生任何故障。 1.75Ω/24:50Ω阻抗变换器的作用用于盐城电视台米波段11频道6层蝙蝠翼振子天线(特性阻抗为75Ω)与主馈管(特性阻抗为50Ω)阻抗匹配中的阻抗变换变比为75Ω/
Our bureau cooperated with the Design Studio of the former China-Canton Bureau and was processed by the Nanjing Institute of 1014. In the first half of 1979, the bureau developed the 75Ω / 24: 50Ω impedance converter for the first time in China. Since January 1980 formally put into use broadcast, has been 1kw and 10kw color television transmitter has been used for 13 winter months, has experienced the summer cool department and thunderstorms, cold winter and snow, the electrical performance has been stable and excellent . Sealing performance good, a total of 70,000 hours of broadcast, never occurred any failure. Effect of 1.75Ω / 24: 50Ω Impedance Converter The impedance transformation ratio used in the impedance matching of the 6-layer batwing antenna (characteristic impedance 75Ω) and the main feeder (characteristic impedance 50Ω) for Yancheng TV Station Mega Band 11 channel is 75Ω /