Power Amplifier Circuit with Active Tone Control using 2N3055 Transistors

Introduction

Power amplifiers are essential components in audio systems as they are responsible for increasing the power of the audio signal before it is sent to the speakers. One common type of power amplifier circuit is the one with active tone control, which allows for adjustment of the frequency response of the audio signal.

The power amplifier circuit with active tone control that uses 2N3055 transistors in the output section, 2N3904 and 2N3906 in the driver section, and C1815 in the preamplifier section is a popular choice among DIY audio enthusiasts.

Specifications of the transistors used in the power amplifier circuit:

2N3055:

• NPN transistor
• Maximum collector current: 15A
• Maximum power dissipation: 115W

2N3904:

• NPN transistor
• Maximum collector current: 200mA
• Maximum power dissipation: 625mW

2N3906:

• PNP transistor
• Maximum collector current: 200mA
• Maximum power dissipation: 625mW

C1815:

• NPN transistor
• Maximum collector current: 150mA
• Maximum power dissipation: 400mW

Amplifier Circuit Diagram with Active Tone Control

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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Components List of Amplifier Circuit with Active Tone Control

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

• 2N3055 Transistor x 4
• 2N3904 Transistor x 1
• 2N3906 Transistor x 1
• 2SC1815 transistor x 1
• 0.33/5W Resister x 4
• 47Ω Resister x 3
• 470Ω Resister x 1
• 15Ω Resister x 1
• 2.2k Resister x 2
• 4.7k Resister x 3
• 33k Resister x 1
• 330k Resister x 1
• 1k Resister x 1
• 100Ω Resister x 2
• 50k Potentiometer x 3
• 4700uF Capacitor x 1
• 10µF Capacitor x 4
• 47µF Capacitor x 2
• 68nF Capacitor x 1
• 2.2nF Capacitor x 2
• 1N4001 Diode x 2

Explanation of Amplifier Circuit with Active Tone Control

The 2N3055 transistor is a high-power NPN transistor capable of handling up to 15A and 115W of power, making it ideal for use in the output stage of the amplifier. The 2N3904 and 2N3906 transistors, on the other hand, are used in the driver stage to provide the necessary amplification of the input signal. Lastly, the C1815 transistor is used in the preamplifier stage to further boost the signal before it reaches the driver and output stages.

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For more project and circuit diagrams, you can go through the Schematics in the main menu where you can find many interesting projects and circuit diagrams like audio amplifier circuits, voltage booster circuit, battery charger circuit and timer circuits etc., which are all beginner circuit projects. Feel free to check them out!

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