PCB Board DIY kit Vacuum Electron Tube DIY Tube Amplifier kit Tube Amplifier kit Valve Preamp Amplifier Board Tube Headphone Amplifier Kit Headphone Amp Parts Musical Fidelity Kit DC12V

Description:A valve amplifier or tube amplifier is a type of electronic amplifier that uses vacuum tubes to increase the amplitude or power of a . Connect this 6J1 tube pre-amplifier between sound source and and it can effectively filter digital flavor. Tube amplifier produces a warmer or more natural valve sound make music and human voice is relatively good.Specifications:Type: 6J1 tube (substitution model 6AK5 6AU6 5654 etc.)Channel Types: 2.0 / stereoVoltage & Current: AC12V 0.8A or abovePower Interface: 5.5 * 2.5 plugCircuit 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 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 Board1 x 2W 2.2Ω Metal Film Resistor6 x 1N4007 Large Current Diodes6 x 4.7K Resistors2 x 1K Resistors4 x 47Ω Resistors2 x 2.2K Resistors2 x 470K Resistors2 x 100K Resistors2 x 200Ω Resistors9 x 50V 470UF Capacitors4 x 50V 1UF Monolithic Ceramic Capacitors2 x D667 Transistors2 x B647 Transistors1 x 50K Potentiometer2 x 3mm Blue LED1 x DC005 Power Connector2 x Tube Base2 x 6J1 Tubes2 x RCA Base1 set x Standoff and Screws1 x Potentiometer Cap