Hello everybody! First post here but I am a long time reader of the forum.
I have a problem with my new MP1, like the tittle says, the tube mode is sounding really like shit, specially the distortion, the clean tube mode sounds so so, if the gain is low it can be more or less ok, nothing to write home about but better than the tube distortion mode anyway, the solid state mode sounds amazing.
It is the first version with the switch on the upper side, I changed electrolitics on the power supply and the tube board and I also tried different tubes with no luck.
I have a second MP1 that is working good, I measured with a multimeter pretty much every IC on the board and compared the readings between the 2 MP1 and did not find something strange, also the voltages on the power supply seem to be what is expected...
On the tube board I think there is too much voltage drop at Q2 or maybe coming to Q2 but I don't know, the tubes readings on the other hand seem correct to me. I am attaching the image with my voltages along the tube board, the red ones are from the faulty MP1, the black ones are from the working one.
What do you think? Can be a faulty Q2?
http://imgur.com/a/3VCXXzp