[sdiy] Gakken SX-150

[HOSHUYAMA]

Hi Fabio,

I put updated schematic.  URL is the same.

Sam HOSHUYAMA
Saitama, JAPAN

HOSHUYAMA wrote:
> Hi Fabio,
> 
> > PS: Is there a missing joint among r4 ,r5, r6?
> 
> I guess so.
> 
> Another mistake is IC2A.  It should form an integrator.
> Please swap the input terminals.
> 
> Sam HOSHUYAMA
> Saitama, JAPAN
> 
> fmg wrote:
> > On Sun, Aug 31, 2008 at 12:40 PM, HOSHUYAMA <houshu at muj.biglobe.ne.jp> wrote:
> > > Hello List,
> > >
> > > I think you know of Gakken SX-150, which is a supplement of a Japanese book.
> > > Basically, most of the information is in Japanese.  However, some English
> > > information is available at Matrixsynth blog:
> > >
> > >  http://matrixsynth.blogspot.com/search?q=SX-150
> > >
> > > Its schematic is already revealed in its instruction manual, however,
> > > it does not include component values.  To get the schematic with component
> > > values, which is essential for us, I made one from the open information
> > > on the internet and some measurement of an SX-150.
> > >
> > >  http://houshu.at.webry.info/200808/article_3.html
> > >
> > > Actually, this small synth was designed by our Naoki Iwakami
> > > (AKA. "GAN" in this list).  The design is unusual to save the cost,
> > > but very clever and unique!
> > >
> > > Enjoy,
> > >
> > 
> > Very interesting circuit, and unusual, too. Sadly have to wait
> > Saturday to come back home to try a breadboard version ( I want a
> > working one now  :)
> > Thanks for the info.
> > 
> > Fabio
> > .
> > 
> > PS: Is there a missing joint among r4 ,r5, r6?
> > 
> > --
> > Fabio Gonzalez
> > Posadas, Argentina
> > 
> >  
> 
>