Input signal in a microphone, V1 and V2 two 8050 tube constitute a two-stage amplifier circuit, signal to enlarge the power amplification circuit, power amplifying circuit using 9013 and 9012 as complementary symmetrical pipe by audio power amplifier, the output on 8 ohm speaker, such a circuit simulation test signal can be amplified 100 times or so, then the actual pieced together after 9013, and 9012 tubes will burn out? Power with 6 v, the simulation test of 9013 and 9012 when the power is in the Pc (collector dissipation power),
In 2 sc1815 and 2 sa1015 do before power amplifier when the pipe was burnt out, because there is no low frequency power transistor, now such a circuit design, the use of 9013 and 9012 in pa end, everyone a great god help me answer the bai, thank you,