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甲类功放的调试方法
更新时间： 2021-02-23 16:34:12  

1、先将R1和R7用可调电阻代换，将R1和R7的可调电阻调至最大阻值。调整R1(100K)的阻值，万用表在直流50V档位，红表笔接C4正极，黑表笔接地，可以调整输出中点为1/2V供电电压。

2、接下来调整R7的可调电阻,将万用表在5A位置，红表笔接在直流滤波输出正极，黑表笔接B+，调节R7使读数为1.5A-2A，具体视散热器温度来定。

3、散热器温度高就调小电流,温度低就调大电流,不过最高不应超出2.5A)，调整好后再测试中点电压为1/2V电源电压，然后监测电流大小等，散热器温度上升后控制在50-80C°。

关键词： 甲类 功放 调试 方法

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