Discussion about the Korg PolySix synthesizer

I haven't tested anything further yet, 
do you think maybe I should open it up again and make 
some more adjustments?
Perhaps even just flick the "stretch tuning"/"equal temperament"
switch and see what difference that makes?

Is it possible I just didn't solder the new vactrol in well?
(it was quite fiddly to get at some of the pins, since
it's a bigger component than the original dual-inline IC)
Or would it not work at all in that case?

--- In PolySix@yahoogroups.com, "gil_we" <gil_we@...> wrote:
>
> Are all VR's functional on that board ?
> 
> 
> --- In PolySix@yahoogroups.com, "David Davis" <feline1@> wrote:
> >
> > Well, it took a little while to get hold of a replacement
> > opto-resistor, but I fitted it last night...
> > pretty confident I got it soldered in right, 
> > but no joy :-(
> > The power-up autotune routine completed much quicker, 
> > but the semitones were still all stretched to hell.
> > Looks like my Polysix is gonna have to make a trip to
> > www.synthrepairservices.com ...
> > 
> > --- In PolySix@yahoogroups.com, "gil_we" <gil_we@> wrote:
> > >
> > > Let us know if it helps...
> > > 
> > > Had the same exact problem on my Trident and it indeed was the 
> expo 
> > > coverter.
> > > 
> > > Thanks ;)
> > > 
> > > 
> > > 
> > > --- In PolySix@yahoogroups.com, "David Davis" <feline1@> wrote:
> > > >
> > > > Thanks very much for the advice - 
> > > > since that only involves replaceing two components on the 
> boards, 
> > > > even my wretched soldering skills oughta be able to handle it - 
> > > > and it won't cost more than a few pounds...
> > > > Will definately give it a try!
> > > > DAVID
> > > > 
> > > > --- In PolySix@yahoogroups.com, "gil_we" <gil_we@> wrote:
> > > > >
> > > > > Check the Files section as for how to replace the optocoupler.
> > > > > 
> > > > > Do not touch ANY of the trimpots, as once you replace the bad 
> > > part it 
> > > > > should stay in its normal tunning.
> > > > > 
> > > > > 
> > > > > --- In PolySix@yahoogroups.com, "David Davis" <feline1@> 
> wrote:
> > > > > >
> > > > > > After many years faithful service, my polysix seems to have 
> > > > > developed
> > > > > > a tuning problem :-(
> > > > > > 
> > > > > > Usually when I first switch it on, and initially hit the 
> keys, 
> > > the
> > > > > > VCOs swirl around in pitch for about a second? (I presume 
> > > that's 
> > > > > some
> > > > > > kind of autotune routine or sthg.)
> > > > > > 
> > > > > > However, recently, when I turn it on, this doesn't happen, 
> and 
> > > the
> > > > > > oscillators stay at some kind of wierd tuning (all the 
> notes 
> > > seem
> > > > > > stretched out, the octaves are about a third or more off 
> pitch!)
> > > > > > 
> > > > > > One time, I left it for about 20 minutes and when I tried 
> > > again, it
> > > > > > was back to normal.
> > > > > > But yesterday it just remained in this wierd state.
> > > > > > 
> > > > > > Any suggestions to make it behave?
> > > > > > I made sure that the pitch bend wheel was centred at power 
> up.
> > > > > > The VCOs are switched to "stretch tuning" inside, but 
> that's 
> > > never
> > > > > > been a problem before, and this is orders of magnitude more 
> > > > > stretched
> > > > > > than that.
> > > > > > 
> > > > > > It's not a NiCd battery calamity, as my Polysix was 
> upgraded a 
> > > few
> > > > > > years ago to a "PolysixM" (with lithium battery) (Johannes
> > > > > > Hausensteiner's mod)
> > > > > > 
> > > > > > DAVID
> > > > > >
> > > > >
> > > >
> > >
> >
>