Hi,
Years ago, i built the MN3007 version from moosapotamus.
I've found this flanger to be fantastic. But since calibrations time, I've always had an issue with my build. If i set the flange in the correct area (more or less), the flange sounds fantastic (as it should

)) but there is an "electronic" sound we can clearly hear when the wave of the LFO is in the low part. It's like a sweeping sound in the mid/high frequency range. In different settings it can be loud (not as loud as the audio of the guitar but it's here and annoying). If the LFO is set at high speed, it can produce something like a police car if you see what I mean

. It's not hum (the flange is really quiet apart from that). Maybe some clock signal that bleeds into the audio part or something like this. I can get rid of this buy setting higher the maximum frequency (turning CW T4 trimpot) but then the flange sound is way too high and it does'nt sound as good.
I've never really used it because of this. It's a BIG shame since it's a project that needed time to be done. And of course, I do love the sound of this flange. It's so lush and beautiful.
But I've plugged it a few days ago and said to myself it was time to fix it.
So does anybody have any ideas to start with to help me getting rid of this issue?
thanks,
all the best,
Ed.