今天做一下測試,先把變壓器的初級的對角兩個腳連起來作為中心抽頭.接到以前的一塊板上.配置為SG3525加IRF3205一對.RD電阻為100歐姆.CT為103,RT電阻分別為4.4,3.2,2.2K歐姆.
先測的RT4.4K,頻率約為15K.能聽見變壓器絲絲的響.空載電流越230MA.

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再做一下RT3.2的.頻率這時大約為20K.平時做機大概也就用的這個頻率,很常用.電流大概是130MA

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這是RT電阻為2.2K的.空載電流降到了75MA.此時頻率大概是28K

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場管沒有散熱片,帶燈只能是短時試一下,我的垃圾電瓶也不行了

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總結(jié)一下,這個繞法就是空載電流比較小,效率高,不算麻煩.成功率較高,我這老菜都可以做,適合新手.取材也很方便啊