no sound, stumped HELP bajaman real tube overdrive

Ang3lus · Post by **Ang3lus** » 11 Sep 2016, 08:19

hey all,

i can't get any sound with this pedal, i've listed the voltages of the IC and tube , using 12ax7 and TL72CP

IC:
1: -15v
2: -14v
3: -13.23v
4: -15.1v
5: -13.23v
6: -13.6v
7: -13.53v
8: -13.94v

tube:

1: 0v
2: 12v
3: 11.5v
4: -3.9v
5: 0v
6: 0v
7: 11.8v
8: 11.3v
9: -5.3v

do the voltages look okay ?

checked with dc voltage, supply is 2A 16v AC

bajaman · Post by **bajaman** » 11 Sep 2016, 10:31

IC voltages look screwy - you should have +15v DC on pin 8 - check your power supply diode polarity as well as the input filter capacitors and the regulators

Ang3lus · Post by **Ang3lus** » 12 Sep 2016, 14:19

regulator should be pumping +15v ?
polarity is fine on the diodes and capacitor orientation also looks ok, none are bloated or look damaged also.

primary suspect now is the regulator

Ang3lus · Post by **Ang3lus** » 14 Sep 2016, 21:36

I'm getting at the input
17.2vAC

and after the diodes -23.1V DC

is it suspicious ?