Delay volume out too low
Hello, I just finished assembling Delay but the volume out is extremely low. I'm using a 100k trimmer resistor for the out gain, but I can't hear any difference when turning the trimmer.
FWIW I have assembled two copies of the module and both have the same issue.
I've resoldered all the dodgy joints, but it didn't help.
Any ideas of what I can try next?


Hey Timm, thanks for your message, and sorry about the trouble. If the main L/R outputs work but the headphon output is completely silent, the issue is most likely around the U15 headphone section or the headphone jack/pot area.
Please check the soldering around U15, the headphone volume pot, the nearby capacitors/resistors, and the headphone jack itself. Also check if U15 gets the correct power:
pin 4: +12 V
pin 11: -12 V
Could you please send a few clear photos of both sides of the PCB around U15 and the headphone output area? I have also emailed you the schematics for further reference.
Thanks, Stefan