Note: this list is for one Assembled and tested Tube preamp board.The circuit is base on the famous D.KLIMO MERLIN
Input voltage: 0-AC250V 50mA
0-AC9V 1A
For 2 boards will need 2 X 250VAC and 2 X 9VAC
Use Tube: 6DJ8 6922 6N11 E88CC 6H23 etc (list price not include the tubes)
Each PCB Size: 188mm*86mm height about 70mm
Gain: about 10 times
Package include: AssembledTube Preamp board X 2pcs
We are not have the Schematic for this board!!!