Vintage Synth Repair

On Tue, Jul 7, 2009 at 7:46 AM, Scott S.<picoshark@...> wrote:
> It looks like VR6 may be my friend in the tuning issue,

<snip>
No luck on VR6, the entire keyboard covers only a fourth, no matter
where it is set. From the 'tuning without a scope" URL:

_13. Alternate playing the lowest key (F3) and highest key (F5) while
_looking at the tuner/counter.
_
_14. Adjust VR-6 until both notes are exactly 2 octaves apart. VR-6
_adjusts the frequency spacing (width) between the two notes. It should
_be exactly 2 octaves, however VR-6 can make it greater or less than this
_amount.

I didn't have a tuner/counter connected, but I can hear a fourth.  The
D/A tune/width/linearity voltages are still within spec. Suggestions?

TIA,
Scott S.