Doepfer

hello bakis,

afaik there is no webpage for the forthcoming stuff yet.
i guess the pages will be updated in january.

best wishes

ingo



--- In Doepfer_a100@yahoogroups.com, Bakis Sirros 
<synth_freak_2000@y...> wrote:
>
> great news dieter.
> any webpages for the forthcoming thru-zero VCO and the
> switched-capacitor filter?
> best regards,
> bakis.
> 
> 
> 
> 
> --- Dieter Doepfer <hardware@d...> 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@d...
> > 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@y...>
> > > >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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