petey testin his boxemup on the ebay china special tube champaroo.
https://www.youtube.com/user/heavymetalATC
check out CLEMENTINE DIY dee-lucks channel as he is building a tube preamp from the same board on his excellent DIY guitar channel . https://www.youtube.com/user/heavymetalATC
https://www.ebay.com/itm/6J1-Valve-Pre-amp-Tube-Pre-Amplifier-Kit-Assembled-Board-Audio-Musical-Fidelity/221893945094?hash=item33a9e8e706:g:7hcAAOSwWnFWAj6R
clementine is my E-pal , and he gifted me this preamp . thank man ! i will use the shit out of this thing to become a real BIG boy with my toobis now . i also think i saw a similar unit but that one ran off 6vdc ~!