WE420A/5755+12AU7 Vacuum Tube Preamplifier Stereo HiFi finished Pre-Amp board （not include tubes）

Reference Conrad-Johnson Pv12 circuit 12AU7 tube preamplifier board （not include tubes） 

Reference Conrad-Johnson Pv12 circuit 12AU7 tube preamplifier board
The sound of the board is very good
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​​Very low noise: output about 1mV
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​The left and right channel resistances of the finished board are precisely matched by electric bridge
​​​Design the printing plate according to the wiring of the shed
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​​​Power supply voltage: ac270v (100mA * main voltage) + ac13v (2a * filament)
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​​Size of printing plate: 180mm long * 140mm wide * 60MM high (height of electronic tube installed)