Archive of the former Yahoo!Groups mailing list: Discussion about the Korg PolySix synthesizer

I managed to cobble together a working Polysix from 2 dead units and a
rebuilt 367 from Old Crow. The oscillators sound pretty in tune, so I
left them alone.

I'm a big fan of self-oscillating resonant filters, so I fiddled
around with the frequency filter VRs to get all the filters tuned to
the same note. Then I screwed around with the KBD TRACK (VR5) and KBD
TRACK OFFSET (VR13) on the 367, knowing that if I sent everything
screwy, I could refer back to the calibration manual I downloaded from
Old Crow's site.

But when I went to the manual, it says to test CN05-06 (which I take
to mean Connector 5, Pin 6) and make sure you get +1.8V. When I test
that pin, I get anywhere from -5 to +5 volts depending on the setting
of Keyboard Track pot on the front panel. The manual doesn't mention
KBD OFFSET.

So my KBD TRACK, KBD OFFSET and FILTER F0 and OFFSET pots are probably
set way out of factory standard and I have no way to get home.

Thus my questions -

1. Is the calibration manual off the Old Crow site the right manual to
use for a 366B? If not, where can I get the right one?

2. If the calibration manual I have is the right one, what am I doing
wrong?

3. Can one get tuned filters over the entire keyboard range, or is
that practically impossible? The best I get was 1 - 2 octaves in tune.
It sounds ok, but it could be better.

4. What is the difference between VR7 (filter offset) and VR8 (filter f0)?

My overriding goal is to get the unit back to factory standard. Any
help towards that end would be much appreciated.

Thanks
Lionel Cassin