6J8P push 6P3P / 6L6 single-ended tube power amplifier board 5Z3P bile rectifier without excellent sound quality no noise | Обустройство

6J8P push 6P3P / 6L6 single-ended tube power amplifier board 5Z3P bile rectifier without excellent sound quality no noise | Обустройство

The circuit board does not contain tubes! !   [Sound description] 6J8P+6P3P fever tube power amplifier board, strong output power, clear and natural sound quality, wide dynamic range, rich harmonics! Much better than EL34's rough and rough pipe.   【Features】 1 Use all AC filaments to light up, the sound is lively and agile, close to the speaker with a sensitivity of 90DB, you can't hear a little hum noise, and it feels as quiet as if it is not turned on. (When using 4H choke coil)   2 Using 6P3P driven by high gain 6j8P, the screen voltage is higher than that of common circuits, reaching 400V, and the output power can reach more than 7W×2. It is suitable for speakers whose impedance is above (4- 8) ohm sensitivity and 88db.   3 Rated output power: 7WX2 (Because the tube has the advantage of strong overload capability, the actual undistorted output power is equivalent to 35w+35w transistor power amplifier! Since all tubes are working in Class A amplification, the distortion is small and the sound is sweet. Gentle and extremely durable!) 4 Using metal film resistors with a precision of up to 1% and imported electrolytic capacitors, the power filter capacitors use PHILIPS main capacitors and Japanese brand sub capacitors.   5 C (capacitor) L (choke coil) R (resistance) C multi-stage filtering, high signal-to-noise ratio.   6 Supporting power transformer link: https:/item/4000939727688.html    Matching output transformer link: https:/item/4001061412594.html      Matching choke link: https:/item/1005001288182391.html   7 The coupling capacitor adopts TE MKP film copper pin capacitor specially customized by our company, the sound is very mellow, and the high frequency is slender and transparent! 8 It is recommended to use 5Z3P rectifier tube×1, 6J8P front stage push tube×2, and 6P3P power amplifier tube×2 for this board’s electron tube. (The effect of the power amplifier tube is better if you change the tube from Nanjing or Europe and the United States. The three types of tubes have imported replacement tubes, and they can also be replaced according to personal preferences)   9 The circuit board design strictly follows the one-point grounding principle. The copper thickness of 1 ounce and the thickness of the copper foil are calculated according to the size of the current. This is no guarantee of noise floor. Our machine pursues high cost performance, PCB board saves a lot of expensive manual scaffolding, and the error rate is very low, ensuring a low failure rate. The die-hards who like to scaffold should not spray us. The convenient thing for scaffolding is to replace the originals. It can be said that there is no impact on the sound quality.   10 PCB specifications: 250MM*100MM, 1.6MM thick glass fiber board   Circuit structure reference drawing (component parameters shall prevail in kind, drawing is for reference only): [Reference effect drawing of finished machine] ​