搜索 - 科创

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捡到一个破烂3mm直径不锈钢棒棒，正好拿来做一个正V天线。用到的材料有：1. 捡来的棒棒 2. 两段铜线 3. 3D打印的一小个夹具 4. 一颗1/4英寸的螺母（用来装在三脚架上） 5. 一块以前做的...

出售物：滨松CR119型光电倍增管。来源：从一台表面污染仪里拆出来的。成色：窗面干净无瑕，无划痕刮碰，整体成色非常完美（从生产至今一直保护在表面污染仪外壳内）出售原因：因为表面污染仪的窗被戳了，闪烁体...

最便宜的办法:黑白电视高压包磁芯上绕十几匝导线，中心抽头，接成单管自激电路，管子用13007，反馈电阻10欧（不够劲可以把反馈直接短接到基极，一节电池供电烧不掉），注意高压包内置整流管的极性，反激输出...

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