150W OCL Amplifier Circuit Diagram using 2N3055

Introduction

An amplifier is an essential component in any audio system as it increases the magnitude of a signal, making it louder and clearer. In this article, we will discuss a 150W OCL (Output Capacitor Less) amplifier circuit diagram using high-quality transistors such as 2N3055 in the output section, BD139 and BD140 in the driver section, and 2SA733 in the preamplifier section.

Specifications:

2N3055:

• Maximum Power Dissipation: 115W
• Maximum Collector-Base Voltage: 60V
• Maximum Collector-Emitter Voltage: 70V
• Maximum Collector Current: 15A

BD139:

• Maximum Power Dissipation: 1.25W
• Maximum Collector-Base Voltage: 80V
• Maximum Collector-Emitter Voltage: 80V
• Maximum Collector Current: 1.5A

BD140:

• Maximum Power Dissipation: 1.25W
• Maximum Collector-Base Voltage: 80V
• Maximum Collector-Emitter Voltage: 80V
• Maximum Collector Current: 1.5A

2SA733:

• Maximum Power Dissipation: 0.2W
• Maximum Collector-Base Voltage: 20V
• Maximum Collector-Emitter Voltage: 15V
• Maximum Collector Current: 50mA

150W OCL Amplifier Circuit Diagram using 2N3055

This project can be built using a few basic components. The circuit diagram of this project is shown below.

Caution: Website contains information on high voltage circuits. Proceed at your own risk, ensuring proper knowledge and precautionary measures to prevent electric shock or injury.

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PCB Layout

Components List of 150W OCL Amplifier Circuit Diagram using 2N3055

Following is the list of all components used in this project:

• 2N3055 Transistor x 2
• BD139 Transistor x 2
• BD140 Transistor x 1
• 2SA733 Transistor x 3
• 1N4002 Diode x 2
• 1N4007 Diode x 3

Explanation of 150W OCL Amplifier Circuit Diagram using 2N3055

The 2N3055 transistor is a popular power transistor known for its high power handling capabilities. Its robust construction and high gain make it ideal for use in output stages of amplifier circuits. The BD139 and BD140 transistors are used in the driver section to provide the necessary signal amplification before feeding it to the output transistors. The 2SA733 transistor is used in the preamplifier section to amplify the weak input signal before passing it to the driver section.

This amplifier circuit is capable of delivering a powerful 150W output, making it suitable for use in audio systems that require high power output. The use of high-quality transistors ensures that the amplifier delivers clear and crisp audio without distortion.

Conclusion

In conclusion, the 150W OCL amplifier circuit diagram using 2N3055 described in this article is a high-quality and powerful component that is essential for any audio system requiring loud and clear sound. By utilizing transistors such as the 2N3055, BD139, BD140, and 2SA733, this amplifier is capable of delivering strong and distortion-free audio output. With its robust construction and high power handling capabilities, this amplifier circuit is a valuable addition to any audio system in need of amplification.

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