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 Forum index » DIY Hardware and Software » Jürgen Haible designs
MatrixFX VCF
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Boerge



Joined: Sep 02, 2009
Posts: 67
Location: Germany

PostPosted: Mon Mar 19, 2018 2:49 am    Post subject: MatrixFX VCF Reply with quote  Mark this post and the followings unread

Hello @all,

has anybody tried to build Jürgens version of the VCS3 filter he used in his MatrixFX-Synth? He didn't publish the complete schematic, only his extension with a box saying "EMS LPF not disclosed". On a picture (matrix_fx_osc3_noise_filter.jpg) the complete schematic lies under the stripboard, and it looks like he built his circuit around the complete original circuit. Unfornately the pics are not available on Randomsources Website, the complete MatrixFX part gives a "403 - Forbidden" Sad
Does anybody know more or has tried to built this thing?

regards

Boerge


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LFLab



Joined: Dec 17, 2009
Posts: 470
Location: Rosmalen, Netherlands

PostPosted: Mon Mar 19, 2018 3:32 am    Post subject: Reply with quote  Mark this post and the followings unread

I recently did a board with an EMS-esque diode ladder VCF and a generic log VCA, used the schematics from Yves Usson's Yusynth site, he mentions that the schematics of the actual EMS VCS3 are not in the public domain. You could use the schematics found here: http://www.phutney.com/

This is mine:
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Leftmost PCB, top and bottom:
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Boerge



Joined: Sep 02, 2009
Posts: 67
Location: Germany

PostPosted: Mon Mar 19, 2018 3:49 am    Post subject: Reply with quote  Mark this post and the followings unread

LFLab wrote:
... from Yves Usson's Yusynth site


That's where I got the schematics from too Wink But my interest goes more to the details of Jürgens circuit (LPF AND HPF), neccessary changes and so on...

regards

Boerge

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