Hi,
My centaur klon is giving me headaches,
the pedal is working, the pots are working as should. Only the gainpot has some scratchiness.
But the big problem is a squeal or oscillation at around 4khz.
This is the layout I used,
http://effectslayouts.blogspot.be/2016/01/klon-centaur.html?m=1
This is my reference schematic,
https://aionelectronics.com/wp-content/uploads/2013/11/klon-centaur-schematic.png
I didn't use any switching scheme. The pedal is to be controlled with a switcher. So the output comes directly from the wiper of the volume pot.
Replace Gain pot, as a start...
(the way the pot is connected may result in oscillation in case of pot set in "scratchy" area..)
I know I read something a long time ago about adding a cap somewhere to take care of whine due to instability..... I'm still trying to find it.
So you're looking for the whine list, Eric? :icon_biggrin:
I'll get my coat... ::)
Its solved....
I replaced the ICL7660SCPA and away it went ...
A bad chip I suppose