Simple Power Amplifier Circuit [2N3055]

Simple Power Amplifier Circuit Diagram
Simple Power Amplifier Circuit Diagram

Transistors:
Tr1 BCY70 (or BC 182L or BC212L or BC214L)
Tr2/3/4 BFY50/51
Tr5 BFX88
Tr6/7 2N3055

Risk of instability if no input connected. When testing, connect R (about 3k3). The Simple Power Amplifier Circuit needs well smoothed power supply of about 20 to 30 volts. Peak power is well over 10 Watts.