This amplifier, which can supply 3 or 5 W of power, according to the values of some components given in the table, was found in a Motorola manual from 1972. Transistors are no longer common, but we can use the pair BD135 and 136 in the output, a BC547 for Q1 and BD136 for Q2. The input resistance is 300k and the maximum current in the 5 W version is 370 mA.
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