This is the Class A amplifier circuit diagram. we can use 12 voltage. negative and positive voltage. it’s a mono audio diagram. this is a simple and easy diagram. we also can use this as a pre-amplifier. this is the logic of making an amplifier.
For this circuit, we need 12 voltage 2 amperes transformer. all resistors will be 1/4 watts. R1 is 10k. R2=12k. R3=1.2k. R4=3.3k. R5=100k. C1=1uf/25volt. C2=220uf/25volt. Pf1=101.
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