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So,
I decided to buy some new ICs from a local store in France (for those interested: https://www.radioelec.com/lot-de-pt2399-processeur-retard-decho-effet-pedale-ic-diy-effets-guitare-xml-350_356_358-1445.html ) and now it works like a charm !

Hi all !

My problem: after populating the board, i tested it alone in my rig. The pcb only make noise / distortion / hum. I can hear a single note (no repeats) but not the dry signal.

History:
I've bought a DeathKlaw PCB from here (of course) and all the parts that i needed from Banzai Music
Pots are Alpha 16mm
All my resistors where tested before soldering
I use to triple check my transistors, so no doubt for orientation.
The ICs are in the right orientation too, and voltages are correct as it's describe in the manual.

What i've changed:
I swaped the 78L05 by 7805A: no change
I swaped the TL072: no change
I swaped the 3 15nF capacitors by film capacitors (they were Xicon Greenies): no change
I swaped the green led by a new one, reversed it: no change

So now ... any advice ? may i have to get some new PT2399 ? seems like these Ics gets problems ...
I can send photos if needed (but i'm at office, not at home)

thanks mate & have a nice day