搜索 - 科创

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FJ2207αβ表面沾污仪和70型辐射仪，表面沾污仪的高压部分有问题，开机后有显示但探头接口只有24VDC，70型辐射仪能正常使用。先拆70型辐射仪可伸缩探棒，上面的屏蔽罩是可调的。

原来得到了一个退役的70型辐射仪，从里面得到了三个疑似计数管的东西，麻烦大家给鉴定一下是不是，还有这个电路要怎么弄，有现成的升压模块，希望能有人给讲解一下放大部分电路应该怎么弄，谢谢

总体上看是那种低灵敏度疑似强流的低量程探头，用的盖革管是J305，很有名也很有历史也很烂大街的管子没看懂两个探头里的疑似变压器起什么作用，主机本身提供380V的高压；目前已经听到了好几种可能，没有电路图，后面跑去忙别的东西就没再看，据说70型辐射仪里也有类似的设计

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