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(1)音控传输/话筒前置放大器.(2)前置放大器阳幅电路.电位器调节限幅电平,并且一旦得到理想的电平时可用固定电阻器来代替.
(1) Audio Control / Microphone Preamplifier (2) Preamplifier Circuits The potentiometer adjusts the slicing level and can be replaced with a fixed resistor once the desired level is achieved.