Audioguru again
- Joined Oct 21, 2019
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The difference in hFE current gain shown in the datasheet between a sensitive TIP41 and a weak TIP41 is 5 times. Then your two amplifier halves probably do not match, then the sensitive one has much less base current than the weak one that needs 5 times more base current. Also the TIP42 has the same specs, then your TIP41 and TIP42 also probably do not match.
An amplifier IC has the transistors in the same chip so that they match very well.
In this simulation showing maximum undistorted output level, I changed the resistance of the collector resistors for Q1. Then I also needed to change the base resistor for Q1 and change the input signal level for the simulation that has perfectly matched transistors that have "typical" hFE current gain:
An amplifier IC has the transistors in the same chip so that they match very well.
In this simulation showing maximum undistorted output level, I changed the resistance of the collector resistors for Q1. Then I also needed to change the base resistor for Q1 and change the input signal level for the simulation that has perfectly matched transistors that have "typical" hFE current gain:
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