Hi all,
As the title mentions, I have a constant buzzing/humming on the boost side of the pedal when I hit the switch on. I used an audio probe to detect where in the circuit the buzzing begins, and it happens on the "D" leg of the BS170 mosfet. I replaced it with an NTE490, but I still get a buzzing. Before replacing the BS170, the LED for the switch was working and now it does not. The Buzzing continues even if I strum the strings. What should my next steps be? I have a multimeter, but just not sure how to apply it for this application or what measurements I should be getting.
As a side note, this was my first build ever from about a year ago and I've come back to fix it. The overdrive section works flawlessly. I have not encountered any issues with it as far as I can tell. However, I definitely made some mistake wiring up stuff in reverse so there might be some damage that I am not aware of. Any tips on how to troubleshoot further is much appreciated.
Thanks for reading. Link to Schematic
As the title mentions, I have a constant buzzing/humming on the boost side of the pedal when I hit the switch on. I used an audio probe to detect where in the circuit the buzzing begins, and it happens on the "D" leg of the BS170 mosfet. I replaced it with an NTE490, but I still get a buzzing. Before replacing the BS170, the LED for the switch was working and now it does not. The Buzzing continues even if I strum the strings. What should my next steps be? I have a multimeter, but just not sure how to apply it for this application or what measurements I should be getting.
As a side note, this was my first build ever from about a year ago and I've come back to fix it. The overdrive section works flawlessly. I have not encountered any issues with it as far as I can tell. However, I definitely made some mistake wiring up stuff in reverse so there might be some damage that I am not aware of. Any tips on how to troubleshoot further is much appreciated.
Thanks for reading. Link to Schematic