Thanks for all who responded - I appreciate the information. I wish there was more of a definitive solution, but I will make due now based on the info I have.
I'm going to complete the calibration this week and see if that helps at all by tuning the filters and the VCA offset.
The next problem in getting this OB-Xa 100% - the pitch bender problem. I have looked at a lot of past posts regarding the issue of the PITCH BENDER not returning to perfect zero and have seen about 5 different answers and approaches to the problem.
Is there a consensus opinion at this point as to what is the best way to fix this problem permanently? Is it install a new pot of the exact same values, or the dead band mod, or what? Just looking for a tech out there that found the easiest solution to fix this problem for the long haul.
My unit has been mine since new in 1981 and I have never addressed the problem even though needed - just want to get it done now that everything else is up to snuff.
Is this the right part:
Honeywell Clarostat 10kOhm 2W Rotary Potentiometer JA1N200P103UA NIB
TIA.
jbrey21@yahoo.com