1000W Amplifier Circuit Diagram using C3858 & A1494 Transistors

Introduction

The demand for powerful and efficient audio amplifiers for various applications has been increasing steadily. One such amplifier design is the 1000W amplifier circuit using C3858 & A1494 transistors, which utilizes advanced transistor technology to deliver an impressive output power. In this article, we will discuss the circuit diagram of a 1000W amplifier that incorporates 5 pairs of 2SC3858 and 2SA1494 Sanken transistors in the output section, along with 2SC5200, 2SA1943, MJE350, MJE340, and BC546 transistors in the driver and preamplifier sections.

Specification of Transistors:

1. 2SC3858: The 2SC3858 is a high-power, NPN bipolar junction transistor commonly used in audio amplifier applications. Its maximum collector current is 12A, and it has a power dissipation of 150W. The transistor exhibits low saturation voltage and excellent linearity, making it suitable for high-power amplification.
2. 2SA1494: The 2SA1494 is a complementary PNP transistor that complements the 2SC3858. It shares similar specifications, such as a maximum collector current of 12A and a power dissipation of 150W. The 2SA1494 transistor also features low saturation voltage and excellent linearity.
3. 2SC5200: The 2SC5200 is an NPN transistor with a maximum collector current of 15A and a power dissipation of 150W. It offers high gain, low distortion, and excellent linearity, making it suitable for audio amplifier applications.
4. 2SA1943: The 2SA1943 is a PNP transistor that complements the 2SC5200. It has similar specifications, including a maximum collector current of 15A and a power dissipation of 150W. The 2SA1943 transistor exhibits high gain, low distortion, and excellent linearity.
5. MJE350: The MJE350 is a high-voltage, NPN transistor commonly used in driver stages of audio amplifiers. It has a maximum collector current of 0.5A and a power dissipation of 1.25W. The MJE350 transistor offers high gain and excellent switching characteristics.
6. MJE340: The MJE340 is a complementary PNP transistor that complements the MJE350. It shares similar specifications, including a maximum collector current of 0.5A and a power dissipation of 1.25W. The MJE340 transistor exhibits high gain and excellent switching characteristics.
7. BC546: The BC546 is a general-purpose NPN transistor that is commonly used in low-power amplifier and switching applications. It has a maximum collector current of 0.1A and a power dissipation of 0.5W. The BC546 transistor offers low noise characteristics and excellent voltage gain.

1000W Amplifier Circuit Diagram using C3858 & A1494 Transistors

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

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Components List of 1000W Amplifier Circuit using C3858 & A1494

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

• 2SC3858 Transistor x 5
• 2SA1494 Transistor x 5
• 2SC5200 Transistor x 1
• 2SA1943 Transistor x 1
• MJE350 Transistor x 2
• MJE340 Transistor x 3
• BC546 Transistor x 4
• BD681 Transistor x 1
• 15V Zener Diode x 1
• 18V Zener Diode x 1
• ±70V DC Power Supply

Explanation of 1000W Amplifier Circuit using C3858 & A1494

The 1000W amplifier circuit using C3858 & A1494 is designed to provide high-quality audio amplification with a power output of 1000W. The heart of this amplifier is the output section, which utilizes 5 pairs of 2SC3858 and 2SA1494 Sanken transistors. These transistors are known for their high power handling capabilities and exceptional thermal stability, making them ideal for high-power audio amplification.

The driver and preamplifier sections of the circuit employ a combination of transistors, including 2SC5200, 2SA1943, MJE350, MJE340, BD681 and BC546. These transistors play a crucial role in amplifying the audio signal and driving the output transistors efficiently. The choice of these transistors is based on their suitability for high-power applications, low distortion characteristics, and excellent linearity.

Conclusion

The 1000W amplifier circuit using C3858 & A1494 described in this article utilizes a combination of high-power output transistors, including 2SC3858 and 2SA1494, and driver and preamplifier transistors, such as 2SC5200, 2SA1943, MJE350, MJE340, and BC546. This circuit design ensures efficient amplification and high-quality audio output. By employing transistors with excellent power handling capabilities, low distortion, and high linearity, this amplifier circuit meets the demanding requirements of high-power audio amplification applications.

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