> Hi
>
> Thanks,
>
> It's come back and it's still out by 10% at two octaves above
> middle c and 20% two octaves below middle c. Andy emailed me to
> say it was spot on when he recalibrared it.
>
> Mark

Maybe the problem is not caused by the A-111-5 but the CV source.

Best wishes
Dieter Doepfer