SOLVED ADHD Oscillating Sound

[BlackLab]

I am relatively new to building pedals, only my 8th and up to now I guess I have been lucky. I have just completed an ADHD and when I ran power to it using an adapter I got an oscillating sound. I checked it with battery power and it was fine and also using the same power adapter I powered it off a Pedalpcb ProtoBoard and that was fine also….so I am guessing it’s a power issue. (Although honestly I wouldn’t really know). I reflowed the C100 10uf capacitor and the C9 100nf capacitor but no success. I then removed the C100 10uf and tested it …. and it showed around 10uf. At this stage before continuing to stumble about I thought I might ask if anyone has some suggestions …..any help would be greatly appreciated.

 

[PJS]

My first thought would be that the pedal is fine and that your power adapter is noisy.

 

[BlackLab]

Thanks ….will give a different power adapter a try. (What I have is an inexpensive D’Addario I bought on Amazon) … wound so like that to be the issue …any recommendations

 

[BlackLab]

Well you are 100% right…just tried a new adapter and the pedal is working just fine ….no noise. Thanks so much for your support.