[sdiy] help finding roland filter schematics?

[Dan Snazelle]

how does the diode sound compared to the transistor? is it much of a difference?




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----------------------------------------
> Date: Wed, 6 May 2009 15:18:09 +0100
> From: oakleylist at btinternet.com
> To: synth-diy at dropmix.xs4all.nl
> Subject: Re: [sdiy] help finding roland filter schematics?
>
> I believe it was the SH-2000 that sparked the transistor ladder patent
> issue. Early editions of the SH-2000 have the Moog ladder filter, while
> later ones had a five stage diode ladder [made with BE junctions of
> transistors].
>
> Since the VCF is contained on a separate circuit board it was an easy
> enough change to implement.
>
> Tony
>
> www.oakleysound.com
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