[sdiy] Kobol Schematics?

Julien Delgoulet jdelgoulet at free.fr
Fri Jul 13 07:02:33 CEST 2012


Here comes a french ;-)
So James, what you would like to do ?
If you are looking for the schematics for some DIY, may be you don't need the whole schematics ...
Here are my tought:
Basically, the interesting part of the kobol is its VCO (env and filter are ssm based)
According to Mark Verbos, the VCO is a ripoff of an oberheim SEM with a UA726 for the expo. So you might use the original SEM VCO design which uses CA3046.
Now the interresting part is the waveshaper... and a NICE person (Mark Verbos) decided to share his redrawn schematic here :
http://www.simple-answer.com/kobolws.pdf

There is also his redraw of the VCO core : 
http://www.simple-answer.com/kobolosc.pdf

From that you could start building the VCO ...

Also from this page of the schematics (http://www.univertron.com/SAS/manuals/RSF/Kobol%20Expander%20Schematics/4.jpg) , this picture (http://www.flickr.com/photos/roginator1/5227283469/in/photostream/) and the BOM which is also in the bad scans you might end up with the correct values for resistors and stuff...

Hope it helps ...

Julien



Le 13 juil. 2012 à 01:41, Dave Manley <dlmanley at sonic.net> a écrit :

> Ahhh...the Brits and the French BFF.
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