This circuit requires enough power supply. B1: 9-volt batteries Or 9V power supply circuit.Q2,Q4: BC557 or equivalent, 45V 0.1A, PNP Transistor.Q1,Q3: BC547 or equivalent, 45V 0.1A, NPN Transistor.2N3055 Amplifier Circuit with PCB | 60Wįirst of all, You need all parts below Parts you will needs.40W transistor audio amplifier circuit with PCB.The 100uF electrolytic protect DC from appearing on the speaker, the require the speaker to oscillate around this new position. This needs to reduce cross-over distortion which occurs whenever two transistors are connected in push-pull. There is a voltage differential of 0.6V between their base and emitter leads. Recommended: 3 transistor audio amplifier circuit The emitter voltage of 0.6V less than this, and will be 4.9V.Īnd next, The Q2-transistor is biased so that it provides a voltage across the 270 ohms load resistor, which will give the output transistors. This provides the base with a bias voltage of 5.5V. Then, at Q1 the bias of the whole circuit commences with the voltage divider made up of the 56K and 100K resistors.
Next, the Q1 and Q2 transistors run as a pre-amp to increase the incoming voltage to drive the output pair. Each output transistor deals with one half of the audio cycle, one being cut-off when the other conduct. GET UPDATE VIA EMAIL 4 transistors workingīoth transistors Q3 and Q4 are arranged as a complementary pair operating in push-pull.
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