Bile fever has been heating up since the 1990s. Its natural and honest. The extraordinary sound has become an old myth in the audio family.
Tube selection is very important. Some of the expensive guts are prohibitive. We are in a big country of tube production. Among the many bile ducts, there are some beautiful and cost-effective gall bladders. Fu-50 is one of the best. This tube is a side-heated beam-emitting pentode. It was mainly used in communication equipment for high-frequency oscillation or RF power amplification. It is called a small 300. The music of the push-pull machine assembled with this tube is better than 6P3P, KT88 and other tubes, and the output power can easily be more than 50W. Its high frequency is delicate and vivid, and the low frequency is fierce and strong, and it can also calmly deal with the general three-frequency inverter.
The voltage amplification of this machine consists of a classic SRPP single-ended parallel push-pull circuit with 6N2T. The dynamic range of the SRPP circuit is large, and the sound quality tends to be acoustic. It is more suitable for use in push-pull amplifier circuits. Since the cathode potential of the tube on this circuit is high, a positive voltage needs to be introduced from the high-voltage end to access the filament end to increase the filament potential to prevent damage to the tube. Of course, if you use 6N11, ECC88 tube, you can ignore this problem, and the sound will have better performance.
The push-pull and invert phase consists of a low-u tube 6N6T to form a cathode split-phase circuit. The internal resistance of this tube is low, and the driving force is better than the popular special tube 6N8P. In the push-pull amplifier I made, there are only two phase inversion methods, one is the more commonly used long tail phase inversion, and the other is a common cathode phase inversion circuit. In the case of amateur production without special equipment, it is extremely difficult to adjust the positive and negative half-cycle amplitude of the output of the inverting stage to perfect, but the common cathode split-phase circuit can easily obtain a pair of extremely close amplitudes. Positive and negative signals. This level of succession is crucial. Later adjustments need to be repeated and meticulous to make the amplifier work in a state of low distortion and high efficiency.
Amplifier level: The grid negative pressure of FU-50 is a fixed supply type. All components of the negative pressure plate are installed on a 10cm & TImes; 10cm universal board. The negative pressure adjustment potentiometer must use high-quality products. If W is open or other defects occur The situation will surely cause a sudden increase in the screen flow of the power amplifier tube and burn it. This machine uses 4 ALPS precision wire wound potentiometers to ensure the safety of the machine. In this DIY, the output transformer is the mail-ordered Sichuan Guanghan "Kaili" finished cattle, the 350VA fire cattle is self-made, and the whole machine cost is controlled at about 700 yuan.
Commissioning: do not insert the tube first, then measure the main voltage, curtain grid voltage, negative bias voltage and filament voltage in the machine after the power is turned on. At this time, the power supply in the machine can be regarded as a no-load state, so the voltage may be higher than the normal value About 10% to 20% is normal. Adjust the negative bias voltage to a maximum value of about 85v, turn off the power and insert each tube one after another without abnormal conditions, mainly adjust the inverting stage and power output stage, play the violin "Liang Zhu" with a CD player, and debug the inverting phase with the final climax of the movement Level output music level, repeating the music piece in it. When playing the violin solo, the frequency of the mid-band is mostly from 1kHz to 4.5kHz, which is more suitable for adjusting the output voltage of the inverting stage. The voltage between the positive and negative signals and the ground is measured with a digital multimeter AC 100V block. Under the condition of determining the screen voltage and the cathode resistance value, the power tube finely adjusts 4 grid negative piezoelectric potentiometers W, so that the cathode voltage drop of the 4 power amplifier tubes to the ground is 0.5V, and the working point is the midpoint of the screen flow characteristic curve at this time. The position on the negative side is the AB1 type amplification type. The machine must adjust the voltage of each point at least 3 times within a week, and then it can be put into normal use.
Connection test: The sound source is the Japanese "Alpine" rear six-disc CD player + homemade 6N4T + 6N3J pre-level + FU-50 push-pull amplifier + 8-inch two-frequency "dedicated" bookshelf box. , Its extraordinary timbre completely achieved the expected effect.
5G Industrial Router features Application field
With the continuous progress and development of science and technology, a new generation of communication technology -5G is gradually entering our lives. In the industrial field, the application of 5G technology is also constantly advancing, bringing new opportunities and challenges to industrial production. Industrial routers, as one of the key devices for 5G applications, play a crucial role. This paper will introduce the definition, characteristics, application fields, development trends and other aspects of 5G industrial routers in detail.
What is 5G Industrial Router
Simply put, 5G industrial router is a special type of router equipment based on 5G technology, which is used to connect industrial equipment and systems to achieve high-speed transmission and exchange of data. Compared with traditional routers, 5G industrial routers have higher bandwidth and lower latency, which can better meet the requirements of real-time data transmission and high stability in industrial production environments.
Features of 5G industrial routers
First of all, high bandwidth is a significant feature of 5G industrial routers. The introduction of 5G technology enables industrial routers to support large-scale data transmission and processing, providing more powerful data communication capabilities for modern industrial production. Second, low latency is another important feature of 5G industrial routers. The advantage of low latency enables industrial routers to achieve real-time data transmission and processing, improving the efficiency and response speed of industrial production. In addition, 5G industrial routers also have the characteristics of high stability, high reliability and high security, and can cope with complex industrial environments and demanding data communication needs.
5G industrial router application field
First of all, the Internet of Things field is one of the important areas of 5G industrial router application. As the popularity and application range of Internet of Things devices continue to expand, the requirements for data communication are becoming higher and higher, and 5G industrial routers can provide reliable data connection and transmission services for Internet of Things devices. Secondly, the field of industrial automation is also one of the main application areas of 5G industrial routers. In industrial production, the transmission and processing of real-time data is crucial to improve production efficiency and quality, and 5G industrial routers can meet the needs of high-speed and low-latency data transmission to help achieve the goal of industrial automation. In addition, 5G industrial routers can also be widely used in intelligent transportation, smart cities, intelligent manufacturing and other fields.
With the continuous development of 5G technology, 5G industrial routers will also usher in a new development trend. First, with the popularity of iot devices, the demand for 5G industrial routers will further grow. Secondly, the introduction of virtualization and network slicing technology makes industrial routers have higher flexibility and scalability, in addition, the improvement of security will also become an important direction of the development of 5G industrial routers to cope with increasingly complex network threats and security challenges.
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