下面是[40W A类功率放大器电路]的电路图

本电路是音频功率放大器，有正负在于：高能耗，高排放的温度等，但也是理想的工作区的晶体管，更更好的音频特性，低失真。

 

材料清单

R1=10ohm R2-16 =2.2Kohm R3-9= 10Kohm R4-6 =330ohm R5-11-12 =470ohm R7=680ohm R8-13= 100ohm R10= 4.7Kohm R14-15=68ohm R17-18 =0.68ohm / 5W 5% R19-20 =0.68ohm /5W 5% R21 =10ohm /1W 5% C1=330 pF 100V 5% C2-4=220 uF 16V C3=39 pF 100V 5% C5-6=100nF 100V C8-9=100nF 100V C7-10=220 uF 63V D1-2-3=1N4148 TR1=1k2 Trimmer T1-2=MPSL01 T3=2N5248 - J204 - BF245C T4-5=MPSL01 T6=MPSL01 T7=MPSL51 T8-9=PMD16K100 Lambda 2N6284 RCA T10-11=PMD17K100 Lambda 2N6287 RCA

ALL Resistors is 1% metal film

(：电路图)