Toroidal Transformer Little Bear T10 Pro 6N2 Tube Valve Phono Turntable RIAA Preamp preamplifier Ver2.6

Upgrade log: 02th-Dec-2015, the Newest version.upgrade few options(all upgrade is refer buyer request.thanks for you guys suggestion). 1,re-design the Gain swtich function. before ,it was through adjust output voltage to reduce output signal.and now. we through control V1 tube to setup Gain 2,add 3 tube cover for 3 tubes. more reduce the back noise then before. 3,add a FUSE. just in case for safe. 4,add a GND connect switch, that switch function is: setup the T10 direct connect to GND through power cord, or disconnect GND. default it is set to connect to GND. but some times. if you connect T10 to your digital amplifier or other AV amplifier and got loud noise. then .you can try to set this switch in "disconnect T10 to GND",that's because Asymmetric ground noise,now we find out that problem and solved it. More information of this phono preamp. you can google it. not let you know down, else. if you have any suggestion for this preamp. fell free message to me. if it's good suggestion, i will keep it. and upgrade that function in next version.

NOTIC:for MM (Moving-MaganeticCartridge) turntable only (with 110V and 220V version for choice)
PCB is finished and all electronic components are already soldered. The panel and transformer and case, you will need assemble by yourself to complete the unit - easy work! after you can using it.

RIAA phono stereo
RIAA freq response 20hz-20kHz +/- 0.5dB, S/N ratio;92dB
THD;0.05%, input sensitivity 3.0mV, gain 50dB
; Nominal / max output 300mV / 1.8V
Output impedance 200 ohms, input 62k ohm

Package included:
1 x PHONO preamp 3 x 6N2 TUBE 1 x 6Z4 tube 6 x panel (assemble to box) 1x transformer(110v or 220V) 5x screws