30W Class AB amplifier
Source: InternetPublisher:7DQjD Keywords: Amplifier Updated: 2025/12/19
30W Class AB amplifier
To set up the amplifiers, first adjust R1 to its maximum and R12 to 0. After successfully completing this operation, turn on the amplifiers. Adjust R1 so that the measured output offset is between 30 and 100mV. Once set, slowly adjust R12 to achieve a quiescent current of approximately 120mA. Continuously monitor the quiescent current as the amplifier heats up, as it may change due to voltage drops caused by heat in the output components. The heatsinks for both amplifiers should be 0.6K/W or less.
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