搜索 - 科创

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无线电频率划分规定2014版规定430-440的业务为：请注意，这里只有[业余]业务，可没有[卫星业余]。也就是说，在主表中，卫星业余业务根本没有列入。但是为什么在435-438又可以使用...

要实现高效率就给电子管栅级加强负电压，反馈多绕几圈就好了，驱动是不是方波也不太要紧。在B站上看了下，期待rb-sama用FM-7F做个VTTC电子管FM 7F是脉冲功率管，脉冲状态脉冲电流≥18A，这...

本帖最后由四次于 2013-12-22 22:13 编辑不久前参加天文竞赛，有2题：（可以无视[s:12] ） [font=微软雅黑][align=center] [align=left]31...

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