Using STK3048 and STK6153 practical circuit

The circuit utilizes the high-power complementary tube STK3048, which operates at high voltage and offers a wide dynamic range. It features an accurate differential input pair, with a common emitter configuration and output terminals connected to a collector constant current source. This configuration results in low distortion, high gain, and excellent power supply ripple rejection. The STK3048 is a robust push-pull high-power tube that not only delivers superior performance but also simplifies the pairing and debugging process, making it reliable and straightforward to implement. The circuit diagram, as illustrated in Figure 3-38, outlines the use of the STK3048 in conjunction with MJ2955 and 2N3055 tubes, showcasing a simplified design that minimizes component count. After powering the circuit, the tubes should remain cool under normal operating conditions, with no abnormal load present. An adjustable resistor (RP) can be utilized to set the voltage drop across resistors R1 and R2 to approximately 10 to 13 mV, ensuring that the quiescent current through transistors VT1 and VT2 is maintained between 40 to 50 mA, allowing for operation in Class A and B states. The circuit design facilitates the soldering of decoupling capacitors and integrated circuits directly, with the ground terminal connected accordingly. If the voltage exceeds the midpoint of 10 mV, a servo circuit can be integrated, with a noted sensitivity of 30 mV. Speaker connections should be established after proper tuning, resulting in favorable performance when compared to other machines in the block.

The STK3048 circuit design is optimized for high-efficiency audio amplification, leveraging the characteristics of the STK3048 tube, which is well-regarded for its thermal stability and low distortion levels. The use of a differential input pair enhances the circuit's ability to reject common-mode signals, thereby improving the overall signal integrity. The common emitter configuration allows for significant voltage gain, while the collector current source ensures that the output stage operates effectively under varying load conditions.

In implementing this circuit, attention should be given to the layout to minimize parasitic capacitance and inductance, which can adversely affect performance. The choice of decoupling capacitors is crucial; they should be placed as close as possible to the power pins of the integrated circuits to ensure stable operation. Additionally, the selection of R1 and R2 values is critical in setting the quiescent operating point, which should be verified during testing to ensure that the circuit operates within the desired parameters.

When connecting the speakers, it is advisable to use high-quality connectors and cabling to prevent signal degradation. Proper grounding techniques should be employed to minimize noise and interference, which can impact audio quality. The tuning process may involve adjusting the feedback loop and gain settings to achieve the desired sound characteristics, ensuring that the amplifier performs optimally across the intended frequency range.

Overall, the STK3048 circuit represents a robust solution for high-power audio amplification, combining ease of use with high-performance capabilities, making it suitable for a variety of audio applications.(1) with the direct promotion of complementary high-power tube STK3048 STK 3048 the use of high voltage, wide dynamic, accurate differential input pair tube, with a common emitter terminal and the output terminals are collector constant current source load, so low distortion, high gain, power supply ripple rejection can use STK3048 9 strong push high-power tube is not only superior performance but also save a lot of pairing with debugging, simple and reliable. As shown in Figure 3-38 is STK3048 push power rate and MJ2955 2N 305,5 tube circuit, the line is simple way to no less an element oRl and R2 can use the finished board.

After power as if the tube is not hot; no other abnormal load can be adjusted RP, make Rl, R2 on the pressure drop is 10 ~ 13mV, so VT1 and VTZ quiescent current 40 ~ 50mA, operating in Class A and B state. Welding can be decoupling capacitors and integrated circuits a foot welded together, the other person "ground" terminal are connected thereto.

If the voltage is greater than the midpoint lOmV, you can pick ^ servo circuit (this article was found to be feeling 30mV). Speaker connections are working to try Xin mother after a good tune with some of the machines in the block compared favorably.