Doepfer

many thanks for the info dieter.
bakis.




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

> I have the preliminary front panels available and
> will put them on our
> website together with some explaining text during
> the next few days. I have
> to point out that it is not 100% sure that the
> switched capacitor filter
> will be manufactured. The SCF seems a bit boring to
> me. From my point of
> view there is no need for this additional filter.
> But we could manufacture
> this filter if there is a minimum quantity of orders
> (e.g. at least 25).
> 
> For the new QVCO module the situation is different.
> We received the last
> batch of CEM3382 from Paul Schreiber/MOTM last week.
> It is used as QVCO in
> the existing A-126. I expect that these will last
> until about middle of
> 2006. After this we will have to find a new
> solution. Probably the A-126
> will be divided into two modules: the main frequency
> shifter (A-126-1 ?) and
> the external QVCO (A-126-2 ?). The external QVCO
> will be much better than
> the existing CEM based VCO (e.g. frequency down to
> less than 0.5 Hz with
> exponential control, thru-zero feature in the linear
> control mode). In
> addition there will be a switch in the final module
> that allows to select
> between VCO and VCF (the sine output becomes lowpass
> and the cosine output
> band pass). After all the QVCO is nothing but a
> self-resonating 12dB VCF
> that is optimized for constant output level (usually
> the output level of a
> filter in self-oscillation depends less or more upon
> the frequency). But the
> QVCO cannot be used only to control the frequency
> shifter but even as a
> thru-zero sine/cosine oscillator or 12dB LP/BP
> filter. We will also offer an
> option that allows to use the QVCO in combination
> with an already existing
> A-126. For this the CEM3382 will have to be replaced
> by an 8 pin IC
> connector with flat cable that comes from the new
> QVCO. With an A-175 dual
> voltage inverter the four phase quadrature outputs
> (0, 90, 180, 270 degrees)
> are possible (0 degrees = sine, 90 degrees = cosine,
> 180 degrees = inverted
> sine, 270 degrees = inverted cosine). With the A-135
> VC mixer and the
> morphing controller A-144 quad panning functions can
> be realized.
> 
> I wish you all a Merry Christmas and all the best
> for the new year.
> Dieter Doepfer
> 
> > -----Ursprüngliche Nachricht-----
> > Von: Doepfer_a100@yahoogroups.com
> > [mailto:Doepfer_a100@yahoogroups.com]Im Auftrag
> von selfoscillate
> > Gesendet: Dienstag, 20. Dezember 2005 15:47
> > An: Doepfer_a100@yahoogroups.com
> > Betreff: [Doepfer_a100] Re: high precision adder?
> >
> >
> >
> > 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
> 
=== 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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