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 Forum index » DIY Hardware and Software
SEM-VCF DIY?
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brother303



Joined: Nov 02, 2010
Posts: 139
Location: ruhr-area/germany

PostPosted: Sun Sep 04, 2011 5:47 am    Post subject: SEM-VCF DIY?
Subject description: Is there a layout/pcb available somewhere?
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Hi guys,

does anybody here know if there is a DIY-SEM-vcf available somewhere in the depth of the web?

Love this filter and want to build one for my modular.

Wink

Thanks!

Greg

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mickey76



Joined: Jul 20, 2011
Posts: 5
Location: Belgium

PostPosted: Sun Sep 04, 2011 6:31 pm    Post subject: Reply with quote  Mark this post and the followings unread

look here:
http://www.modular.fonik.de/Page37.html

Fonik has a back-up of some projects from the EFM forum.
In the 1900 series you'll find VCF1E, VCF2E and VCF1F to be close to what you want. I haven't built or heared any of these designs though!
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brother303



Joined: Nov 02, 2010
Posts: 139
Location: ruhr-area/germany

PostPosted: Mon Sep 05, 2011 3:48 am    Post subject: Reply with quote  Mark this post and the followings unread

Hi Mickey,

thanks for the hint,looks good!

Cheers

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reve



Joined: Feb 23, 2008
Posts: 147
Location: USA

PostPosted: Fri Sep 23, 2011 5:25 am    Post subject: Reply with quote  Mark this post and the followings unread

I'd also mention that the SEM 1a schematics are in a variety of places on the net and you can build the filter section directly... the only slightly weird part that the original used was single 301 opamp, IIRC.
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