Home Forums GuitarPCB Build Support Dr Phybe – (solved) Reply To: Dr Phybe – (solved)

#6440
wilkie1
Moderator

OK.  I think you can measure a varying voltage at lug 2 (or the middle pad ) of the Rate pot (P1).  If so, Measure the voltage at any of the Gates of Q1-Q4.  IF the voltage is steady there, slowly adjust the Trimmer.  At some point , you should see the voltage at the gate start to vary.  Adjust the trimmer to get the maximum variance.  Now you should hear phasing with a guitar signal applied.  If not, tell us where you lost the varying voltage.