When Finshed I've tested it unboxed and all worked great. I boxed it and it didn't work : no sound at all, nothing. I unboxed it, re-wired it outside of the box and all work great. I boxed it again and it didn't work : no sound at all. I unboxed the board, checked each pot for a ground issue, changed the two output jack sockets, changed the the power socket and removed the transistor sockets to solder them directly on the board. Also checked the 3PDT switch. It worked perfectly well unboxed. And when I boxed it for the third time it didn't work. Same : no sound at all. Someting like a white noise when blend pot fully CCW.
AaaaaAaaaaaaAAaarrrrrrggggghhh ! I spent two days on this little piece of **** and it still didn't work !
Here is the guts of the beast. Pretty messy wiring, but remember I've made it threee time !!
I found that when everything is boxed except the pots it works. I then tried to reinstall each pot individually and test the result : it works. I then reinstall the pots one by one and tried : it works to the point where all pots where boxed in place. And now it works.
It's cool that it works, but I'm a bit disapointed that I didn't understand what happened...
Could be an intermittent connection. You could try plugging it into your amp and wiggle/gently tug each wire around while the effect is switched on. If you hear a weird noise or the sound cuts out when you move a wire then check the solder joint and wire