AC 12V 1A 6J1 Value Preamp Tube Preamp Amplifier Board PreAmplifier Headphone DIY Kits

Features 1 Type 6j1 tube2 Power input AC 12V 1A 5 5 2 5 plug3 Channle 2 0 stereo 4 Potentiometer Role Volume adjustment Power Switch5 Size 77 x 75 x 52mmNote This is DIY Kits and you need to assembled it by yourself No instructions supply Specification FE 6J1 2 fever tube pre amp board is the circuit schematic design imitation crew Music fax X 10D to be rational optimization more stable performance than the original machine tube play 10 increase This board uses a single 12V AC input the circuit processing provides 6J1 tube needed positive and negative voltage and filament power supply voltage Power works an open power tube filament heating is started when the boost from the zero voltage start boosting hot filament tube etc also happens to boost boosting finish so this is the same with the guts rectification 8 470UF the capacitor filter very clean good power supply system will not have a hum the filament is 12V DC power supply need two filament tube is connected in series with a DC filament also in order to reduce the noise Instructions 6J1 Tube Buffer 0 85 times magnification connected between the source and before or after class can effectively filter digital flavor 1 AC 12V input The DC3 5 5 5 2 1 socket 12V AC power adapter if you use non plug AC 12V transformer power cord need to solder on the circuit board Remember You can not use a DC power input otherwise it does not work 2 the left channel input right channel input audio