Simple FET power amplifier circuit diagram Class A DC power amplifier The AP500A is used as the promotion level, and a pair of Hitachi famous tubes K1058 / J162 are selected as the final level. In the picture, K1 and K2 are toggle switches. K1 can interchange the L and R channel input signals; K2 is used to disconnect the load during shutdown to avoid impact. After the circuit is correctly installed, just adjust the 4.7kΩ potentiometer to make the quiescent current of the final power amplifier tube 300mA. Symbol Handheld Scanner,Zebra Hand Scanner,Motorola Handheld Scanner,Zebra Symbol Scanner Guangzhou Winson Information Technology Co., Ltd. , https://www.barcodescanner-2d.com
