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自本刊今年第5期发表了《自制210路语音寻呼装置》一文后,不少读者来信指出该装置中的一些关键元件难以买到,现作一补充说明:1.发射、接收组件RX5019和RX5020可以用一般的调频发射、接收电路或模块替换,只是作用距离不同而已,功能不变,必须注意的是,高频发射、接收都必须接上天线,否则会严重影响作用距离。2.元件替换:IC1可用TCM5087、S2559、UM95087、TP5087直接替换MK5087,
Since the publication of the fifth issue of this year, the “Homemade 210-Way Voice Paging Device” article, many readers have pointed out that some of the key components of the device are hard to come by. We hereby add a supplementary note: 1. The transmitting and receiving components RX5019 And RX5020 can be used with the general FM transmitter, receiver circuit or module replacement, but the role of different distances only, the same function, it must be noted that high-frequency transmitter and receiver must be connected to the antenna, otherwise it will seriously affect the distance. 2. Component Replacement: IC1 available TCM5087, S2559, UM95087, TP5087 directly replace MK5087,