Newest 6J1 tube preamp amplifier board Pre-amp Headphone amp 6J1 valve preamp bile buffer diy kits(6J1 tube preamp amplifier board+Transparent shell parts)

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 ,so this is the same with the rectification,8*470UF the capacitor filter very clean,good power supply system not have a ,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.
Color as shown
Material: plastic + metal
SIZE: 77MM * 75MM * 52MM

Package Contents:
1* 6J1 tube preamp amplifier board
1* Transparent shell parts
1* Instruction manual
1* Screw package
Note: This is Diy Kits. you need .

Only the above package content, other products are not included.
Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.