Excuse me, Little Angel's experts.
I have a some problem with my Little Angel building. I used tagboard vero layout. I built it some months ago, and I had a little background noise when I play (not so loud but I can hear it

), PT2399 tipical noise, I think. I tried 3 different IC. With 2 I got no changing, and the third didn't work. I tried with another 78L05, too.
Somebody tried to help me in this forum, but I got nothing, yet. I checked the voltage, those are ok.
I test it out of the box, without footswitch nor led indicator and with a little bit diyng battery at the moment. After boxed and with a psu this circuit could be less noisy or not?
Seems to me some demo on youtube of this pedal play noiseless.
I really don't understand this.
Another thing. I tested the circuit after much time, and just now I notice, when I set speed and, even depth pot, to zero, a quickly detune. It is normal?
Thank you!