Bc547 Amplifier Circuit Diagram

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Bc547 transistor audio instructables .

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Audio amplifier using transistor BC547

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Simple Preamplifier Circuit Diagram

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BC547 Double Transistor Audio Amplifier : 8 Steps - Instructables

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Audio Amplifier using BC547 transistor | Audio amplifier circuit

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Video amplifier splitter circuit using BD137-BC547-BC557