LT1086 three-way voltage regulator 6H6P electron tube secondary rectification buffer positive and negative voltage output transistor / power amplifier pre-stage power board.
LT1086 dual voltage regulator 6H6P tube secondary rectification buffer voltage output transistor / op amp pre-stage power board, transistor / op amp pre-stage, school tone power board, unique tone effect.
Current audio circuits, transistors / op amps and other pre-stages use transistors / modules for rectification and voltage stabilization. The headquarter has a new path and uses electronic tubes to form circuit signal channel loops. The sound effect is different from the general transistor integrated block voltage stabilization circuit.
This line is specially designed and manufactured for the power supply of the audio pre-stage / op amp integrated block. It has a unique effect, and the timbre used with the fever op amp is quite bold. The tube output buffer power board has been produced by the company more than ten years ago. It may be the first in China, and now it has been improved and upgraded.
Electron tube rectification belongs to the mode of vacuum space charge movement. It moves relative to the semiconductor current in the crystal particles and has a hysteresis effect on the front and back drops of the audio signal waveform. Under the vacuum condition of the bile duct, the charge cannot collide with solid impurity particles. Therefore, its sound will be different from that of amplifiers powered by solid-state transistors.
The 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 tube rectification is much more charming, which is very flattering to the ears.
Since the electron tube is heated by the filament, the internal working temperature of the electron tube is usually above 400 ° C, and the change of the natural environmental temperature is far below the working temperature of the bile duct. No matter the spring, summer, autumn and winter, the tube work is stable and is not affected by the ambient temperature, so constant current, voltage regulation, protection, compensation, etc. are unnecessary. The signal path is very short, which is in line with the principle of high fidelity-concise Supremacy.
The electronic tube is used to rectify the switching RF radio frequency interference caused by no transistor rectification (on and off), which is also the reason why the crystal diode rectification requires a 0.01UF capacitor (absorption and elimination of switching noise generated by RF radio frequency interference). Therefore, there is a difference between the timbre of a tube rectifying device and the timbre of a solid transistor rectification. Its "timbre is charming and aura, full of air".
The circuit board has three-way adjustable voltage-stabilized soft-start circuit for power supply, and one way for 6.3V for two 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, to avoid sudden jumps in voltage and impact on the tube, to protect and prolong the service life of the tube. The other two power supply tube regulated output. The voltage is slowly pressed from 0V to 38V for a few seconds. The voltage rises slowly to avoid sudden jumps in the output voltage and impact the amplifier circuit. The soft start time of the filament is faster than the output time of the two-way tube, which is equivalent to the high-voltage delay effect.
The output voltage of this circuit is adjustable from ± 1.2V to ± 38V (no load). The electronic tube plays a secondary rectification and buffer role in this circuit. Finally, the output is filtered by a common mode π choke coil. Choke EI48X30 center tap, six pins. Z11 iron core, high-quality oxygen-free copper enameled wire winding.
The tube / filter capacitor is a necessary channel for the signal of the amplifier circuit and is an integral part of the entire amplifier. Its importance is self-evident.
The thickness of the exquisite double-sided fiberglass board is 2mm. Board size 150 × 92mm, LT1058 high-precision adjustable linear voltage regulator, overvoltage and overcurrent protection, high control accuracy. Precision 3296 multi-turn potentiometer adjustment, dual-channel output voltage accuracy adjustable, small ripple factor. Using two voltage stabilizing blocks of the same model, the positive and negative power supply indicators are symmetrical and the same, which is better than using positive and negative voltage stabilizing blocks.
The filament is stabilized by the American LT1058 original LT Linear Precision high-precision adjustable linear voltage regulator, the effect is better than the LM317 voltage regulator circuit. With low pressure drop and low internal resistance, overvoltage and overcurrent protection, high control accuracy.
This power supply line inputs three groups of AC voltage 0 ~ 36V100ma, 0 ~ 36V100ma, 0 ~ 9.5V 1.5A. The output voltage is adjustable from ± 1.2V to ± 38V (no load), and the output current is about 30mA.
Transformer Z11 core, high-quality oxygen-free copper enameled wire winding, 20W transformer core size is 57 × 35mm can also be customized according to requirements, please contact customer service!
