20W Power Tube Amplifier with EL34

The following diagram illustrates the circuit design of a 20W power amplifier built using the EL34 tube component. The EL34 is a well-known tube that is highly regarded for its performance in power tube amplifiers. The circuit presented is a complete design that encompasses the tube amplifier circuitry.

The 20W power amplifier circuit utilizing the EL34 tube is designed to deliver high-quality audio amplification with a warm, rich sound characteristic of tube amplifiers. The EL34 tube operates in a push-pull configuration, which enhances efficiency and reduces distortion, making it suitable for various audio applications.

The circuit typically includes several key components: a power supply section, input and output stages, and biasing resistors. The power supply section is responsible for providing the necessary high voltage to the EL34 tubes, typically around 400V, along with a lower voltage for the tube filaments. The input stage often consists of a preamplifier circuit that may include additional tubes or solid-state devices to prepare the audio signal for amplification.

In the output stage, the EL34 tubes amplify the audio signal, which is then passed through output transformers. These transformers are essential for matching the high impedance of the tubes to the lower impedance of speakers, ensuring efficient power transfer and optimal sound quality.

Biasing resistors are crucial for setting the operating point of the tubes, which affects the linearity and overall performance of the amplifier. Proper biasing ensures that the tubes operate within their optimal range, minimizing distortion and maximizing output power.

Overall, the circuit diagram of the 20W power amplifier using the EL34 tube represents a classic design that combines simplicity with effective audio performance, making it a popular choice among audiophiles and audio engineers.The following diagram is the circuit diagram of 20W power amplifier which build based tube component EL34. EL34 is very famous tube and great for power tube amplifier. The circuit above is complete circuit contains tube amplifier circuit di.. 🔗 External reference