Discussion about the Korg PolySix synthesizer

I tried to contact crow a few times as for buyin a naked KLM-367A 
board but got no answer.... is he still making those ?


--- In PolySix@yahoogroups.com, "lionelcassin" <lionel@...> wrote:
>
> 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
>