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RWF40.001A97
RWF40.001A97晶体三极管:晶体三极管主要起放大作用,那么如何来判测三极管的放大能力呢?其方法是:将万用表调到R×100挡或R×1K挡,当测NPN型管时,正表笔接发射极,负表笔接集电极,测出的阻值一般应为几千欧以上;然后在基极和集电极之间串接一个100千欧的电阻,这时万用表所测的阻值应明显的减少,变化越大,说明该三极管的放大能力越强,如果变化很小或根本没有变化,那就说明该三极管没有放大能力或放大能力很弱。
电极的判断方法
测量的锗管用R×100档,硅管用R×1K档,先固定红表笔与任意一支脚接触,黑表笔分别对其余两支脚测量。看能否找到两个小电阻,若不能再把红表笔移向其他的脚继续测量照顾到两个小电阻为止,若固定红线找不到两个小电阻,可固定黑表笔继续查找。
RWF40.001A97
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