Vikye Vacuum Tube Pre-Amplifier, 6J1 Vacuum Electron Tube Valve Preamp Amplifier Board Headphone Amp Parts Musical Fidelity Kit Connected to Mobile Phone,Computer, MP3, MP4

• [Effective Filter] Connect the 6J1 tube preamplifier between the sound source and the amplifier, it will effectively filter the digital taste, music and human voice will be relatively good.
• [Capacitor] Eight 470UF capacitor filters are very clean, the excellent power system does not generate hum, the filaments are powered by 12V DC and must be connected in series to reduce noise.
• [Coupling Capacitor] The coupling capacitor is an electrodeless electrolytic capacitor with high frequency and low resistance.
• [Usage] With DC 5.5 * 2.1 socket and 12V AC transformer, you can also use the 12V AC transformer without plug, just need to solder the power cable to the circuit board .
• [DIY] This kit comes in parts so you can assemble it yourself, enjoy the process of building your own tube amplifier.

Specifications: Type: 6J1 tube (substitution model 6AK5, 6AU6, 5654 etc.) Channel Types: 2.0 / stereo Voltage & Current: AC12V 0.8A or above Power Interface: 5.5 * 2.5 plug Circuit Board Size: 77 x 75mm / 3.03 x 2.95" Instruction: 1, AC 12V Input: using DC 5.5*2.1 socket and AC 12V transformer, you can also use AC 12V transformer without plug, just need to weld the power cord onto the circuit board. DC power input can not be used, or it will not work. 2, Sound Channel Input: Connected to mobile phone, computer, MP3, MP4 and many other music players. 3, Sound Channel Output: Connected to the audio signal input of power amplifier. 4, Power Switch/Volume Knob: Rotate the knob anticlockwise to turn down volume, and continue rotating until you hear the sound "tick" to power off. Rotate the knob clockwise until you hear the sound "tick" to power on and continue rotating to turn up volume. Package Includes: 1 x PCB Board 1 x 2W 2.2Ω Metal Film Resistor 6 x 1N4007 Large Current Diodes 6 x 4.7K Resistors 2 x 1K Resistors 4 x 47Ω Resistors 2 x 2.2K Resistors 2 x 470K Resistors 2 x 100K Resistors 2 x 200Ω Resistors 9 x 50V 470UF Capacitors 4 x 50V 1UF Monolithic Ceramic Capacitors 2 x D667 Transistors 2 x B647 Transistors 1 x 50K Potentiometer 2 x 3mm Blue LED 1 x DC005 Power Connector 2 x Tube Base 2 x 6J1 Tubes 2 x RCA Base 1 set x Standoff and Screws 1 x Potentiometer Cap