sorry for the long delay. I checked both versions - I confirm, the buffered microcircuit sounds fuzzy and thin, I absolutely did not like this option. so yes - unbuffered IC sounds like it should.

Therefore only the buffered version of the 4049 is usable for analog applications. I think you mean un-buffered. I'm glad we've got that sorted out. The internet is not really the best platform for technical discussions. Anyway my question still stands. Were those builders who were having problems ...

I have one more question.
I understand it is true that at the output of the IC1A there is always a bundle of 22n 22n 6.8k and 15k 15k 22n?
Is this link always parallel to the gain resistor?
That is, this circuit always affects the tone?

Thanks!

Hi Baja, A great one, thanks a lot! Some questions though... Is there a reason you made the input buffer out of a jfet instead of using IC1b for this? Also I'm thinking about making this one the preamp of a Class D poweramp I've seen on ebay. I would use a switching powersupply for it (again from t...

Here's another schematic based on the GUMA: http://peperspedals.blogspot.nl/2017/02/a-brief-guide-into-tracing-out-pcb-to.html and the update on that: http://peperspedals.blogspot.nl/2017/03/b3k-clone-update.html I also made a Vero out of it, but I still haven't checked it: http://diyl.sait.nl/guma...