我做了一个JJ,SG3525驱动3对75N75,变压器是25寸彩电上的初级1.1线两根并绕7匝中心抽头,次级0.5的线100匝,不加后级载500W发白75N75没一分钟大约50度不敢长时间带载怕烧,空载电流250MA,还要请教变压器是什么规格的?
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