Re-engraved and upgraded version of British Music Fax X10-D 6H30 version of the tube buffer, 4 tubes, 6H30 tube buffer, 6X6C tube rectifier, fully regulated power supply.
Today's audio equipment is almost dominated by digital technology and digital equipment. Devices that can effectively eliminate the digital taste. Currently commonly used methods and components mainly include iron core signal isolation transformers, buffer lines, power amplifier output transformers, multiple independent isolation 220V power transformers, etc. , Simple, direct, effective and practical.
X10-D audio and fax tube buffer magazines and the Internet are all introduced, and you can check it yourself.
In order to fully tap the potential of the sound fax tube buffer, 6H30 is used to replace the 6DJ8 tube. The power supply adopts split circuits for high and low voltages to strengthen the quality of the power supply, and the effect is even higher.
Stereo RCA input and output, dimensions: car guy CELLO silver all-aluminum front-end chassis, outer size 240X100X306, this machine is all aluminum precision production, surface drawing oxidation treatment, the finished machine weighs about 4.8KG/unit.
The British "X10-D" audio fax is a product launched in the mid-1990s. It has been around for nearly 30 years. It has excellent sound effects and a unique appearance, which caused quite a stir after being put on the market. The X10-D buffer is like a panacea. It is almost versatile when used with audio sources such as computers, mobile phones, CDs, MP3s, decoders, etc. It brings good results and can greatly reduce the "digital taste" and "transistor sound." ", so that the entire audio system has a sweet and natural "guts", which is called "Little Pig" by enthusiasts in Hong Kong, and the new price is nearly two thousand yuan. There are many imitators, and the sound effects are well-known, and people are full of praise. Many imitators have achieved good results.
"X10-D" audio fax index: distortion 0.008% (10Hz～100KHz), frequency response: 10Hz～100KHz (±0.2db), output impedance: 200 ohms, no gain, input and output signal 1:1.
This machine 6H30 is powered by a 6X6C electronic tube. The electronic tube rectification is a vacuum space charge movement method. Compared with the semiconductor current moving in the crystal grain, it has a hysteresis effect on the front and back of the audio signal waveform. There may be collisions with solid particles, so its sound will be different from that of an amplifier powered by solid transistors.
The electronic tube has excellent linearity, stability, large output dynamics, and is not easy to clip. The original ecological rectification is conducive to audio transmission. Therefore, the sound of the tube rectification is much more charming, very pleasing to the ears.
Because the electronic tube is heated by the filament, the internal working temperature of the electronic tube is usually above 400 ℃, and the change of the natural environment temperature is far below the working temperature of the bile duct. The electronic tube is stable in spring, summer, autumn and winter, and is not affected by the ambient temperature, so such things as constant current, voltage stabilization, protection, compensation, etc. are not necessary. The signal path is very short, which is in line with the principle of high fidelity-simplicity Supreme.
Improvement of this line;
1: The original machine 6DJ8 is upgraded to 6H30, and the filament is also changed from unregulated power supply to three-terminal regulated power supply. Even the 6X6C rectifier tube also uses a regulated power supply, which has a unique sound and different from the general transistor integrated regulated power supply.
2: The power supply adopts LM317/LT1086 series stabilized power supply output, and the output power is supplied before buffering by the electronic tube. The technical indicators and effects of the power supply internal resistance, ripple coefficient, and transient characteristics are far better than the full-wave voltage doubler boost used by the original machine Circuit.
3: Circuit board plates, resistors, filter capacitors, coupling capacitors, pipe sockets and other components are better than those used by the original factory, and the sound quality and effect are better than the original factory.
4: This circuit board considers layout wiring from many aspects such as anti-interference, reduction of ripple, and improvement of sound quality. It is grounded at one point, the line is very quiet, and the signal-to-noise ratio is above 100DB, as if it is not turned on.
This circuit board has an immediate effect on high-end CD players and decoded audio sources of tens of thousands of yuan, and has a more obvious effect on low-end players. It is a weapon to improve the sound quality and tone.
6X6P electron tube introduction: 6X6P is 6H6P, it is a special tube for big eight-pin communication ultrashort wave detection. It is a double diode specially designed and manufactured for detection. The capacitance between electrodes is small and the operating frequency is high. The 2AP9 germanium detection diode is similar to the transistor. Quickly restore the efficiency of crystal rectifier diodes. In order to avoid small signal distortion, its working linearity is much better than ordinary rectifier tubes, so it is very effective for small current rectification, the tone is fine and smooth, warm and soft, the sound field is open, and the tone is transparent and full.
The 6X6P rectifier tube belongs to the vacuum space charge movement mode. Compared with the semiconductor current moving in the crystal grain, it has a time lag effect on the front and back of the audio signal waveform, and the bile duct is in a vacuum, and the charge cannot have solid impurities. Particle collision. The original ecological rectification is conducive to audio transmission.
The electronic tube is used to rectify the switching RF interference caused by the rectification of the transistor (turn on and off). This is the reason why a 0.01UF capacitor (to absorb and eliminate the switching noise generated by the RF radio frequency interference) is required for the rectification of the crystal diode. Therefore, the timbre of the electronic tube rectification device is different from the timbre of the solid transistor rectification, and there is a big difference. Its "sound color is charming, aura and full of air" ", another sunflower treasure of audio gameplay.
4 channels of adjustable voltage stabilized soft-start circuit for power supply, 2 channels of 6.3V for two electronic tube filaments. When the power is just turned on, the voltage is slowly pressed from 0V to 6.3V, and the tube filament slowly rises from the cold state with low resistance, avoiding voltage jumps and sudden changes to impact the tube, protecting and extending the life of the tube. The other two channels are for electronic tube regulated output. The voltage is slowly pressed from 0V to 30V for a few seconds, and there is a slow rise process to avoid sudden jumps in the output voltage from impacting the amplification circuit. The filament soft start time is faster than the output time of the two-way electronic tube, which is equivalent to the high voltage delay function.
The working voltage of 6H30 electronic tube is ±33V, and the 6X6C electronic tube performs secondary rectification and buffering in this circuit. The electron tube and the filter capacitor are the necessary channels for the signal of the amplifying circuit, and they are an inseparable part of the whole amplifier, and their importance is self-evident.
The new original imported Russian Electro-Harmonix tube, model: EH 6H30PI.
Electro-Harmonix is the largest brand under the US NEWSENSOR Group. It has a wealth of history and experience in the manufacture of electronic tubes. It provides audio enthusiasts and instrument players with high-quality and musical electronic tubes through a rigorous manufacturing process. EH provides electron tubes to dozens of first-line audio manufacturers, and is more popular among audio enthusiasts. Maybe you are using EH tubes. I believe you can appreciate the perfect sound and reliable quality of EH tubes.
The origin of the 6H30 tube is the Soviet Union. The 6H30 belongs to the frame grid type electronic tube. It adopts a super-reinforced structure with a three-layer mica root bracket as an auxiliary support. It is highly seismic and has a life of up to 10,000 hours. At that time, it was applied to the fighter "Su-27". The mechanical structure was highly strengthened. At the same time, its electrical characteristics were about two parallel 6DJ8/ECC88, high transconductance, large output current, low output impedance, and ultra-low mute. , There is almost no microphone effect, a bit like the Telefunken E182CC tube of good quality at the time, and it can exert great performance under simple conditions. Only because it was a Soviet jun product, the ban was only lifted at the end of 2000, and it was known to amplifier manufacturers and amplifier enthusiasts.
