[sdiy] Behringer Model D PCB.. design decrypted..

Ullrich Peter Peter.Ullrich at kapsch.net
Tue Feb 20 16:22:51 CET 2018


Have a look at the Model D schematics Uli Behringer posted on gearsluts a while ago: VCF is on page 3



http://www.ullrich.at.tt (my webpage)
http://www.rc100-usb.at.tt (Roland Sampler Tool)
http://synpro.heimat.eu/datadial.htm (DataDial Synth Addon)

Von: Synth-diy [mailto:synth-diy-bounces at synth-diy.org] Im Auftrag von Jean-Pierre Desrochers
Gesendet: Dienstag, 20. Februar 2018 15:41
An: synth-diy at synth-diy.org
Betreff: [probably spam] Re: [sdiy] Behringer Model D PCB.. design decrypted..

Looking at the upper right pcb section I can see
the VCF region (around VR11 and VR12)
that uses the low pass Moog ladder design
(C77,78,79,80 with T28,29,30,31,32).
But what about the original ua726 based VCO's ??
Did Behringer use an older (discrete) VCO design
or they made the ua726 design using other type of matched NPN pairs ??

Curious ...



Le 2018-02-20 02:46, Mike Beauchamp a écrit :

For those interested in what the Behringer Model D circuit board looks like, I took a full res picture while I had it apart:




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