6N2+6E2+FU19 tube amplifier single-ended class A tube amplifier 4.8W+4.8W

DIY KIT:A full set of DIY Kits, including all components and tubes （Does not include Bluetooth module）, you need to assemble it by yourself Finished amplifier:Assembled finished product,no need to assemble by yourself（Does not include Bluetooth module） Bluetooth digital decoding module ： Please contact me if you need to install a Bluetooth digital decoding module for Kits or finished products, add 18 usd. Product description: 1. Sound description: 6N2+fu19 Class A amplifier, which is well controlled in the entire audio band. It has the unique characteristics of electronic tube Class A. The intermediate frequency is warm and mellow, the high frequency is clear and layered, and the low frequency is flexible, full of strength, and exciting. 2. Because of the well-designed PCB circuit board and exquisite installation technology, the tube filament is connected with AC twisted pair, and the bottom noise control is perfect. The ear is close to the speaker 10CM for trial listening, and there is no hum noise, and it feels as quiet as if it is not turned on. . 3. The power supply part is specially designed and developed for the PCB circuit board, using multi-level capacitor filtering to make the front stage work more stable. In particular, the screen grid power supply design is added to make the power supply voltage very stable when the music is bursting to ensure that there is no Distortion and stable work. 4. The volume potentiometer adopts Taiwan Liyang 16 B100K dual audiophile stepping potentiometer to ensure clear positioning and left-right balance. The coupling capacitor uses German Weimar or high-quality CBB film capacitors, and the filter capacitor uses high temperature and high frequency electrolytic capacitors. , The connecting wire uses Teflon high temperature wire, using high-precision 2W metal film resistors and high-power wire wound resistors. 5. The whole machine adopts high-grade aluminum alloy upper and lower split customized chassis, which is precision processed by CNC equipment. 6. The volume knob is made of 30MM solid pure aluminum at any cost. The connecting screws are all stainless steel hexagon socket screws and nuts, and pure copper connecting posts. The internal connection line adopts Teflon high temperature line. 7. The fu19 class A amplifier circuit driven by 6N2 is used, the output power is 4.8w+4.8w, and the impedance of the speaker is 4-8 ohms and the sensitivity is above 89db. 8. The tube has the advantage of strong overload capability, so the actual undistorted output power is equivalent to 50w+50w transistor power amplifier! Push a pair of bookshelf boxes below 80W, and a room of 20 square meters is loud enough. External dimensions: Width 190MM (the widest panel size) Height 180MM (the height from the base to the highest tube) Depth 315mm (the depth of the volume knob to the binding post) The measured thickness of the panel is 7.8MM, the thickness of the upper plate is 3MM, and the thickness of the back plate is 3MM. Amplifier parameters: Output power: 4.8W+4.8W Frequency response: 20Hz–20kHz Input impedance: 100KΩ Output impedance: 4Ω, 8Ω Signal to noise ratio: 90db Input sensitivity: 500mV—2V Tube: After-stage power tube: FU19 Pre-amplifier tube: 6N2 (Dawn) Cat’s Eye Tube: 6E2 Transformer specifications ： Power transformer: 85W Iron core: E176 0.5mm new annealed silicon steel sheet Frame 25*50 iron core stack thickness 50mm Primary input voltage; 0-220V Output voltage; 0-210V-250V 150ma 3. 15V-0-3. 15V 2A; 0-6. 3V 2A; 0-6. 3V 2A 5W single-ended output transformer: Iron core: E157 Frame: 19×26 (tongue width 19. stack thickness 26) Primary: 5K, DC resistance -346Ω Winding method; 3+2 fever-level winding Secondary: 0-4 Ω -8 Ω Shielding method: electrophoretic black-plated iron shell fully shielded Note: When testing the machine, you must first connect your speakers. No-load test can easily burn the output transformer or tube