Hi For those of you building the YUSYNTH VCO I have changed the values of two resistors R36 and R51 (were 27K) which are now 4K7 in order to incease the range of the PW potentiometer. I also corrected the value of R8 which was labelled 50K in the schematics but is actually 470K. Regards -- Yves Usson http://yusynth.net yves.usson at yusynth.net