Yeah @Nostradoomus pointed out the solder joints already. You mentioned you had reflowed the solder joints? Maybe add another picture so we can do further visual inspection?
After another look I do think the GND pads need to be connected to ground too. I didn’t notice that at first. I don’t...
Yeah on top of the aluminum enclosure. If I go above 1mm or maybe 1.2mm I can get into trouble. Not sure how thick Tayda enclosures are but it’s gotta be at least 1mm? I should take another look at some of my failed faceplates.
How are you audio probing this? What tools are you using? What you describe doesn’t make a lot of sense. You can’t have signal at the output of IC1 but not at the input.
One thing others have not mentioned: did you make sure all the components have the correct values? Did you measure them...
I make laser engraved acrylic faceplates and I can say that more than 1mm is going to be a problem because pot shafts are not usually long enough for more than that. Basically you end up not being able to screw the nuts back on. Also phrasing.
The difference is that in an isolated jack the sleeve is disconnected from the chassis, which is usually grounded, so you can lift the ground easily.
Edit: search for “insulated jack” on Tayda.
The solder joints on the switch could be hotter and with more solder. Check out some other build reports. The back of the board is pretty covered in flux and it’s hard for me to tell if all the solder joints are good. I would start with a very thorough visual inspection to make sure they are all...
I built this a couple years ago and I’m pretty sure the switch lets you select a broad or narrow eq shape. It doesn’t quite get into cocked wah territory but the narrow Q is very noticeable with a distortion before it. From JHS: