Condition:New
Type:Logic ICs
Model Number:A 6F3+300B
? ? ? ? ? ?300B is a mysterious vacuum tube with a long history. I don’t know how many fans are lost. I still don’t know how many people are trying to find his (her) real voice. The music fever industry thinks that 300B is a female voice representative. My 300B kit circuit is a soft and soft voice, not a woman who is only attentive and charming, but also a gentleman of the Iron Horse. Because the low-cost 300B single-ended amplifier loses the design flaws, the intermediate frequency attenuation is serious, resulting in a thin intermediate frequency, and there are rumors that the 300B low frequency is not good. From the electrical point of view, the internal resistance of 300B is only 800 ohms, which shows his The damping coefficient is very good. Why is this so? The quality of the power supply, the time constant of the circuit design == caused by the reason, the 300B pipe is the most representative of the atmosphere of the music, because the characteristic curve of the pipe is very good, coupled with the second harmonic sense of hearing, Singing people's mouth shape, chest resonance resonance low-frequency tension, dynamic can be said to reach the perfect state, if regardless of power, hundreds of thousands of transistor world famous machines in the same power range as 300B is difficult to transcend, from acoustic From the perspective, the 300B amp sound is more expressive and full of music. . . . . . . The 300B kit introduced by the company is unique in acoustics and electrical regulation from the design to the output of the cattle. The 6F3 is a partial-door composite pipe. It is quite a 12ax7+6p14. Because of the huge inventory, the price is low. However, the performance of the tube is extremely excellent, especially connected to the 3-pole tube, the output internal resistance is particularly low, the linearity is good, and the drive 300B is completely out of the question. Many senior enthusiasts will definitely ask, why use large loop feedback? This is the designer's consideration of sound and stability. The big loop will sacrifice the transparency of the medium and high frequency. However, in order to improve the weakness of the low frequency of the tube, the use of the large loop can make the internal resistance of the 300B amplifier lower, so that the sound can be achieved. The overall balance, the kit is a civilian Rolls-Royce version, can be completed with general DIY! Someone will ask, why is such a good kit a cabbage price? Because the company is a large-scale production of cattle, transformers, circuit design integration, due to the advantages of procurement and production, coupled with the people's guidelines, so the price is very low, but the sound is thousands of dollars in the market Unable to compare, the enthusiasts who have the approval can try boldly! ! !?Friendly reminder: Because there are more accessories inside, it can not be listed one by one, but ensure that the accessories are complete and authentic, because this kit is purely used by DIY enthusiasts, there is no hands-on experience, and friends with ability must be cautious, unclear places are welcome I am always inquiring about the consultation, the individual parts of the chassis should be processed by themselves, and the position of the output cow and choke is not open, in order to let the enthusiasts have more options for the installation of the output cow! ! !?
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Brief introduction to kit list:?260W power supply cow*1 (Red Bull Core 105*70)?25W output cow * 2 (British antique iron core 86 * 40) impedance: 3.4K. Output: 0-4-8?Choke Ring*1 (Japan Z11 Core 76*50,10H250ma)?300B*2 (brand-new original factory paired HI_FI series of Sound of Lin Kui)?6f3*2 (Old Shanghai)?5Z2P*2 (J level)?Potentiometer * 1 (original Alps 27 50K)?Output terminal * 6 (2 gold plated high current black and 4 red)?RCA input terminal * 4 (gold plated, red and white two signal conversion switches * 1)?Pipe seat * 6 (big 4 feet 2, 8 feet 2, 9 feet shield 2)?Resistance Pack * 1 (High Current * 4, Low Power as Figure Parameters)?Welded plates (4 sets, with screws)?Circuit diagram * 1 (with actual improved parameters)?Supporting package * 1 (1 m high quality signal line, 2 m silver tinned wire in USA)?Finished Board with Delay Circuit*1 Chip?Chassis: chassis bottom, lining, upper chassis (3-D: 420*240*65mm)?Weight: 17KG (about 14.5kg without chassis)?Power: 7.5W?Power consumption: 160W?Power voltage:Default 230V,if need other voltage,please remark?when order.
