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Welp, I'm sorry to say that this has been ANOTHER SUCCESS for the community! So I changed C8, C9 and C4, and reflowed all the connections, and we have got a live one! Thanks to everyone who helped. It's been a while since I needed a fresh set of eyes, and it's so refreshing to see that this...

Ok, probed a bit to locate where the hiss begins : Hiss becomes noticable coming out of C4 (nothing on R8), but you have to crank amp volume to hear it At this stage : Things get really noticable coming out of C9 at any volume, and is influenced by the drive knob

Ok, so flipping them around has sorted my sound problem. Volume an Tone work again, it is a nice crunchy sound, but the drive knob only serves to insert hiss without affecting the actual drive of the guitar. Gonna probe to see who's generating the hiss, but if anyone has any ideas in the meantime!

I spent some time making sure everything was oriented the right way according to the pinouts, but as usual, if someone asks I begin to doubt myself! Here are the datasheets : Q1-2-3-5-6 are 2SK117 Q4-7-9 are 2N3906 Q8-10-11-12 are 2N5088 Though the 2SK117 datasheet I found is a little...

D'oh! Sure thing. Added photos to the original post for simplicity's sake

Hey Guys, it's been a while! I was wondering if I could get a fresh set of eyes on the problem I'm encountering.? Building an Aion Aurum (boss OD-2). I've always has sound going through, but the drive knob does absolutely nothing. Mind you this is a with with a few (5) SMD's, and though i...