[sdiy] Gakken SX-150

[HOSHUYAMA]

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
> 
>