I'm feeling a little sheepish to finally be posting a build report for this when I participated in the trace thread a while back! I have to admit I had a failed build of this the first time around, so picked up a second board this summer when my daughter got me a PPCB gift certificate for my 50th b-day. I know what the problem was--the Ge diode I used was not leaky enough for the Q3 to bias (it had something like 6 megs of "reverse resistance"). I found that Chuck D. Bones had mentioned that possibility somewhere after I realized the build wasn't working. Problem was, I could not desolder that diode for anything! I clipped the old one out, but the leads were too thick to suck out of those small holes...
Anyway, I tested all my remaining Ge diodes and found a 1n34a with only about 3k of reverse resistance (so quite leaky). It biased up just right this time and sounds amazing! I used a OC141 with 135hfe and almost no leakage, same one from the first build. Thanks again to Pedal PCB for making this available to the community!
Anyway, I tested all my remaining Ge diodes and found a 1n34a with only about 3k of reverse resistance (so quite leaky). It biased up just right this time and sounds amazing! I used a OC141 with 135hfe and almost no leakage, same one from the first build. Thanks again to Pedal PCB for making this available to the community!