[sdiy] Compact VCF

[elmacaco]

My first thought was Ken Stone Steiner VCF, actually, two!!!

----- Original Message ----- 
From: "rdrake" <rdrake at data2action.com>
To: <harrybissell at prodigy.net>; <_nial_ at yahoo.com>;
<synth-diy at dropmix.xs4all.nl>
Sent: Monday, March 01, 2004 12:11 PM
Subject: RE: Re: [sdiy] Compact VCF


> a second vote for Ken's version of the steiner-parker:
>
> http://www.cgs.synth.net/
> http://www.cgs.synth.net/modules/cgs35_syntha_vcf.html
>
> this is one of my all-time favorite modules.
>
> the e4m documents are still available, tho:
>
> http://www.ele4music.com/projects.html
>
>
> The Steiner-Parker filter (Ken Stone makes a CGS clone)
> would be a good choice... His design crushed the circuit
> onto a very small board.
>
> I'd suggest the VCF1e design from Tom Gamble's EFM
> (Electronics for Music) however I think all the
> schematics may have been removed from the site (the
> modules are discontinued so check for yourself). =20
> This design was based on the National Semiconductor
> datasheet for the LM13600 / 13700 example of a lowpass
> VCF. =20
>
> If you use a resonance pot instead of voltage
> control...
> this VCF could be done with a single LM13600 package
> and maybe two transistors.
>
> It would not track a keyboard CV as is, but otherwise
> would satisfy all VCF functions nicely.
>
> H^) harry
>
>
>
> --- Karl Ekdahl <_nial_ at yahoo.com> wrote:
> > Hi all.
> >=20
> > I'm currently building on a portable synthesizer and
> > i
> > need a *small* VCF to fit in. Since i've got a zero
> > budget (mark my words), i'd like something based
> > around ordinary parts and possibly one or two
> > CA3080's. I don't need anything fancy, just a
> > regular
> > lowpass with resonance and cutoff. The best
> > alternative i've found so far is Ren=E9 Schmitz MS20
> > clone, any other suggestions?
> >=20
> > Thanks
> >=20
> > Karl
> >=20
> > H=F6strusk och gr=E5 moln - k=F6p en resa till solen p=E5
> > Yahoo! Resor p=E5 adressen
> http://se.docs.yahoo.com/travel/index.html
>
>
>
>
>
>
> >----- ------- Original Message ------- -----
> >From: harrybissell at prodigy.net
> >To: _nial_ at yahoo.com, synth-diy at dropmix.xs4all.nl
> >Sent: Mon, 1 Mar 2004 -0800 (PST) 08:59:06
> >


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