Important: This project is for advanced builders
Mesa Boogie Dual Rectifier Tube Preamplifier .
This is very good and often commented projects on forums.
It include small PSU pcb and Tubes so on builder is only to made adequate enclosure.
It can be used as an independent overdrive or as a part of an amplifier.
Tubes are very good russian 6N2P type .
Transformer which is needed for PSU is 1x 220-230V 200mA and 1x 6.3V 2,2A
Pcb is FR4 1.6mm 2oz Green Hasl