Doepfer

great news dieter.
any webpages for the forthcoming thru-zero VCO and the
switched-capacitor filter?
best regards,
bakis.




--- Dieter Doepfer <hardware@doepfer.de> wrote:

> For this I'd recommend another approach: Usage of
> several voltage reference
> sources (e.g. TL431) with adjustable output
> voltages. For adjustment (e.g.
> 1.00V, 2.00V ...) I'd recommend 25-turn precision
> trimming potentiometers.
> This avoids the need of 0.1% resistors with the
> right values. The TL431 data
> sheet can be found in the internet.
> 
> Best regards
> Dieter Doepfer
> Doepfer Musikelektronik GmbH
> Email address: hardware@doepfer.de
> Web Site: www.doepfer.com
> 
> P.S. we have been working hard during the last few
> days. Now I can confirm
> that these devices will be shown at NAMM (provided
> that they do not get lost
> during shipment ...):
> 
> A-101-9 Universal Vactrol Module with some examples
> (probably A-143-1,
> A-162)
> A-188-1A 1024 stages BBD
> A-188-1B 2048 stages BBD
> A-1?? Switched Capacitor Filter
> A-1?? Quadrature Thru-Zero VCO / 12dB VCF, can be
> switched between lin/log
> control and between VCF (12dB LP/BP) and Sine/Cosine
> VCO
> CTM relay board
> MTC relay board
> d3c
> (and maybe TKB Version 2, but we are not sure if it
> will work in USA with
> 115V/60Hz as we use the hum noise induced by the
> mains leads to the human
> body and that much different for 115V/60Hz compared
> to 230V/50Hz)
> 
> 
> > -----Ursprüngliche Nachricht-----
> > Von: Doepfer_a100@yahoogroups.com
> > [mailto:Doepfer_a100@yahoogroups.com]Im Auftrag
> von n keller
> > Gesendet: Montag, 19. Dezember 2005 22:17
> > An: Doepfer_a100@yahoogroups.com
> > Betreff: RE: [Doepfer_a100] Re: high precision
> adder?
> >
> >
> >   I would like a module with some precision
> constants available,
> > perhaps a
> > 4HP module with CV Source outputs for precise
> whole numbers like
> > -3,-2,-1,1,2,3,4,5VDC.  I'm guessing this is a
> very simple module
> > to make,
> > like some of the other recent suggestions.  I
> think it would be
> > useful in my
> > system, especially if a precision adder was,
> .....well, added.
> >
> >   Perhaps someone can make a suggestion on how to
> slap one of
> > these together
> > and I'll make one up.  Let's see.....we've got 12V
> right on the rails.
> > I've got my A-180 style faceplate and sockets.  Is
> it a simple matter of
> > connecting -12V or 12V through the "correct" 0.1%
> resistor to
> > each socket,
> > or should I buffer the -/+12 through a dual op-amp
> in the 1Xamplifier
> > configuration as shown on Doepfer DIY page before
> branching off
> > through the
> > 0.1% resistors??   Can anyone with a workbench
> find some resistor
> > values and
> > post them?
> >
> > nick
> >
> >
> > >From: "selfoscillate" <synaptic_music@yahoo.com>
> > >Reply-To: Doepfer_a100@yahoogroups.com
> > >To: Doepfer_a100@yahoogroups.com
> > >Subject: [Doepfer_a100] Re: high precision adder?
> > >Date: Mon, 19 Dec 2005 13:42:46 -0000
> > >
> > >
> > >hello dieter,
> > >
> > >with the right amount of jacks this module would
> close a real gap
> > >in the a100 module range. what i always wanted is
> a buffered
> > >version of an a180 and a precision adder could be
> used that
> > >way too, if it had enough jacks.
> > >
> > >how about three inputs, four buffered outputs and
> one
> > >inverted output? could be done on a 4 te
> faceplate.
> > >if you manufacture a module with similar specs,
> then
> > >i'll buy a minimum of six modules for my system
> right away.
> > >
> > >best wishes
> > >
> > >ingo
> > >
> > >
> > >
> > >
> > >--- In Doepfer_a100@yahoogroups.com, "Dieter
> Doepfer" <hardware@d...>
> > >wrote:
> > > >
> > > > An precision adder is from the technical point
> of view no problem
> > >(nothing
> > > > but the CV mixer on the DIY page but without
> attenuators and
> > >precision 0.1%
> > > > resistors and high quality OpAmps). If there
> are sufficient
> > >inquiries we
> > > > could develop such a module. How about a poll
> ?
> > > >
> > > > Best wishes
> > > > Dieter Doepfer
> > > >
> > > > > -----Ursprüngliche Nachricht-----
> > > > > Von: Doepfer_a100@yahoogroups.com
> > > > > [mailto:Doepfer_a100@yahoogroups.com]Im
> Auftrag von okiikahuna
> > > > > Gesendet: Samstag, 17. Dezember 2005 23:16
> > > > > An: Doepfer_a100@yahoogroups.com
> > > > > Betreff: [Doepfer_a100] Re: high precision
> adder?
> > > > >
> > > > >
> > > > > Ingo,
> > > > >
> > > > > I think that this is an absolute necessity.
> It could also serve
> > >as a
> > > > > buffer, since the CV output of some modules,
> like the midi to CV
> > > > > module, drops if fed into too many
> oscilators and filters and
> > >such.
> > > > >
> > > > > There are not a lot of good alternatives out
> there: Analogue
> > > > > Solutions makes an 8hp CV mixer that is
> completely unusable for
> > >this
> > > > > purpose because it is WAY too imprecise.
> (don't bother trying it,
> > >I
> > > > > already have)  The Analogue Systems Buffer
> is much more precise,
> > >but
> > > > > you can't mix more than one voltage.   The
> Doepfer Buss Access
> > >mixes
> > > > > and buffer, but still not enough inputs. 
> So, there is a real need
> > > > > for this.
> > > > >
> > > > > It could be made as a 4hp module, since all
> you would need are
> > > > > inputs and outputs. (don't need precision if
> you are gonna screw
> > >it
> > > > > up with pots anyway) An inverting output
> might be nice.
> > > > >
> > > > > K
> > > > >
> > > > >
> > > > > --- In Doepfer_a100@yahoogroups.com,
> "selfoscillate"
> > > > > <synaptic_music@y...> wrote:
> > > > > >
> > > > > >
> > > > > > hello list,
> > > > > >
> > > > > > what would you guys think about a high
> precision adder/mixer?
> 
=== message truncated ===


Bakis Sirros - Parallel Worlds
[Doepfer_a100] group owner
http://www.parallel-worlds-music.com
http://www.shimarecords.co.uk
http://www.rubber.gr
Athens-Greece

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