Thank you. If necessary I will post the pictures if needed. I will post the numbers also. And by your suggestion I socketed the transistors. Is the way I measure the voltage ok (so left and right leg of the transistor?) The voltages of the 2 other transistors are around 4.5 V but I will test some more. Even without the guitar plugged in there is some hiss. I will do some more investigation and post everything including a sound/video clip but this will take some time.