[sdiy] Roland System 100 - Circuit details.

[Tony Allgood]

>Ok, the transistors in the moog ladder are tied to the voltage divider
chain via base,  that way the internal nodes (caps) will not float very
much up and down during sweeps. Diodes simply don't have a base and will
therefore fly up and down.

Yes, these were my thoughts... so I replaced the unmatched pairs in the
SH-2000's filter with 2SC3381 with matched ones and got no difference
whatsoever. There is another thing going on here. If I get some time,
I'm going to simulate some of these circuits.

Regards,

Tony Allgood, Penrith, Cumbria, England

Oakley Modular Synth and TB3030:
www.oakleysound.com/projects.htm
My music: www.mp3.com/taklamakan