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BD7IWW:赞一个。户外使用用DC/DC转换供电。三节锂电(10.8~12.6V)供两路DC/DC,一路10.8~12.6V转2.4V供5只管子的灯丝。另一路转90V大约60mA就够了。整个体积也就是一包烟大小。
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