This machine is built by hand with thick copper barIntersecting line(the plane parallel lines of non PCB "shed" board are neither parallel nor parallelDisjointThree dimensional space connectionSetting up a shed can make full use of the 3D space in the case. The wiring between parts is short, the circuitous wiring is small, the distributed capacitance between parts is small, mutual interference is minimum, heat dissipation is good, sound is time-consuming, and the hook welding process is time-consuming

In order to thank your friend, the quasi high configuration model of $770.46 and the high configuration model of 6$1244.32It can be directly equipped with s Lin Lai's sound 274B rectifier

And can choose high efficiency, small sound dye, good dynamic, output power up to 23 W + 23 w fixed bias model, (default is self-contained bias model)

Basic models

20W + 20W (fixed bias type 23W + 23W). Upgraded - output transformer (105x60) high quality military enameled wire, Teflon film or DuPont film (the best contact with the customer), optimized combination - due to the good sound output voltage transformationThe machine can't be wound by automatic winding machine, so it has to be wound by hand, which is time-consuming, time-consuming, complicated and good sound.

Winding method: the secondary winding is a parallel winding with multiple winding ends and good sound. When the high voltage of the plate is 430v, the cathode resistance will drop 70V. Screen 430v cathode 70V = 380V screen cathode for 300b electron tube under 380V screen cathode high pressure, it is necessary to have power, long service life and ten years of discharge.

If the screen high voltage is only 350V, then 350V (screen high voltage) minus 70V (cathode resistance voltage) = 280v 300b electronic tube screen - the negative voltage is only 280v which 300b electronic tube can produce decent output power and sound??? If you have any questions, you can go to the website of XD or noble voice to have a look.(when the high voltage of 300b electronic tube is lower than 420v, the sound is hard to play. When the high voltage reduces the power, the insulation is simple, and the cost is low.) the output power is increased to 20W.... 300b

The electronic tube is a gourd shaped shell with good sound in the early years, but the gourd shaped shell has a large space and the electrodes are relatively far away, so it is difficult to produce good sound when the high voltage is low. In order to verify the correctness of the problem, you can draw a 350V terminal on the 430v high voltage coil, which can let you feel the difference of sound effect between 430v high voltage and 350V high voltage. Of course, if the screen of 300b electronic tube is pressed down, the insulation cost of the whole machine will be greatly reduced. I don't agree with this method of saving labor and reducing material。

Supper model:

Two-channel signal

The channel is equipped with Teflon silver line in Guhe of Japan as standard, and the power channel is equipped with Teflon thick silver line. Japan Hirosaki silver solder welding.... $1244.32 is equipped with Hi-B output transformer and 4 Danish ares oil immersed coupling capacitors. On the surface, it seems that the price is on the high side and the actual cost performance is very high. They are all parts of high-quality accessories once and for all (the output transformer is the basic part and the soul of the courage machine, that is to change the tube There is no expiration period for the oil immersed coupling capacitor of the Danish ares version. In recent years, the price has been rising all the time. The sound effect must be improved for 5 days (because the courage machine is mass-produced, the sound may start to be tighter if it can't be fully burnt one by one, but it will become looser at any time, and the charm and strength of the bass will be displayed incisively and vividly... If it doesn't conform to your music orientation, you only need to bear the freight for returning the goods. The direct heat electronic tube has a unique sense of penetration, especially the reproduction of human voice. The string music has an irreplaceable dreamlike listening sense of the side heat electronic tube. The 300b direct heat electronic tube with good linearity has a unique charm.

Parallel tubes powerdynamicIntensityThe sound field is widened with a large increase, and the bass is thick and steady when the volume is low.... It has all the advantages of "Danhou" 300b andTwo hundred and eleven thousand eight hundred and forty-fiveIts momentum, transparency, charm and resolution are still300bSingle ended style, almost no push home speakers

The 300b cathode has a good charm. Maybe the 300b electron tube is charming. No matter which kind of electron tube is only close to it, no one can surpass it so as to share the beautiful sound with friends,It is made entirely by hand,Three dimensional shed for new parts of thick copper bar,In the early years, the radio station used time-consuming and laborious hook welding technology....

For those who like grinding machines (tossing), there is a new space to show (experience). You will not get hurt even if you weld (change) it ten times. Linlai flat filament 5u4g electronic tube with good charm is used as full wave rectifier buffer and c-r-c-l-c filter circuit. Large dynamic electronic tube ﹣ single triode 6c5pj is used as the front stage signal amplification, which has higher separation and more thorough (better sound effect) than double triode. The power tube 6p6pj (6v6) is used as the driving amplifier, which has essentially different lift compared with the voltage amplifier 6n8p (or 6n8p parallel tube). The voice of nobility is directly heated by 300bhifi electronic tube for power amplification, with thick bass, rich bottom rhyme and lingering aftertones.... Completely and completely pure manual shed technology, completely eliminate the electrostatic interference on PCB circuit board. The circuit is simple and neat, the noise is controlled to a very low range, the sound is sweet, delicate, soft and hard to listen to, the Viola pulls out the silk, the bamboo flute blows the bamboo forest, the female voice whines the bone...... It really explains all the connotations of the direct heat electron tube 300b. All aluminum alloy case, simple and beautiful. Durable power switch, two signal inputs (SWITCHING), two light level meters swing with the size of music power. Silver plated tube holder, gold-plated copper crystal terminal, red high-voltage electrolytic capacitor filter with good voice, former level - supplement level, the whole frequency band of copper foot coupling capacitor in the United States is more transparent, with more details, and promotion level - the super group of copper foot high-voltage coupling capacitor in the United States - has excellent charm and magnificent bass... Pre graded Japanese ELNA cathode electrolytic capacitor - icing on the cake... Promotion level and power grading, quiet and sweet NICHICON cathode capacitor, icing on the cake Ni Jie Kang electrolytic capacitor decoupling, Japan Alps index volume potentiometer, will not be damaged after several years of use. The former stage amplifier and driving stage load resistor upgrade are equipped with Japanese Riyan and Japanese Jinwei fever supplement resistor . The sound is sweeter, the charm is more mellow, refreshing, euphemistic....

Performance parameter:

●Rated output power: 20W × 2, the fixed bias model is 23W + 23W (it can be pushed, and the sensitivity is 83-93db, 30w-200w speakers can be pushed well)

●Frequency response:20Hz--25KHz ●Total harmonic distortion:< 1%(1kHz)

●Input sensitivity:300mV--2000mV

●input resistance:100K ohmOutput impedance:4 Omega, 8 ohm

(there is strict impedance matching between the impedance of the output transformer and the impedance of the speaker. The impedance of the speaker will be reflected back to the impedance of the primary coil of the output transformer through the secondary coil of the output transformer. If the impedance matching gap is large, 300b will float away from the sound working range. If your speaker is 6 ohm, 11 ohm, 15 ohm, 16 ohm, please contact customer service. Our company will provide you with the appropriate output impedance Anti output cattle to you. Don't try to replace it -- it will lose the reproduction of good voice)

●Signal-to-noise ratio (SNR):88dBvolume(L×W×H)：416mmX350mmX220mm

●Weight:28kg（114X70Power cow, double 105most commonly rolledExporting cattle

●Front stage signal amplification electron tube: Dawn6C5PJ isSingle triode (higher resolution and better sound effect than double triode with two triodes in one glass shell)。 Push tube dawn6P6PJPost power tube: the voice of nobility300bHIFI * 4。 Bile buffer rectifier Lin lai 5u4g。

Upgrade model:

?Upgrade version is basic version change the power cow:

?The power cow is 114x70, and the reserve power reaches 300W. When the bass power is high, it can provide enough power without soft feet. The output ox is a 105x60 Nippon Steel 0.35z11 iron core, with low resistivity and oxygen-free copper enameled wire carefully wound in multiple layers. Choke is 66x36 Nippon Steel 0.35z11 core. Low resistivity oxygen free copper enameled wire winding system, high full window rate.