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Doepfer

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Re: I need to calibrate my A-185-2: need some instructions please

2008-05-24 by hemi_ch

>>Speaking of being *very* useful, what is this thing exactly?<<
I patch my 1V/Okt signal(s) to it.
those are coming mostly from a Seqeunzer.
Basically i have just one Sequenzer patched to it to the first input.
With the related switch i can switch the sequenze between minus and plus.
this gives me a first possibility to "play" with my groove.
then i can add with the switches 1Volts and shifting the SEquenz up
and down this way.
In combination with other Knob and Switch tweakings this is a nice way
to "play" with my grooves.

since having more then one Sequenzer i sometimes patch both Sequenzers
to the a-185.
so i can mix them together in many Ways.
hmmmm......Yes i use it as a precise mixer. 
You're right ;)

I got this way really nice grooves.
another thing is that the a-185-2 works also as a Buffer.
Not unimportant when you use to patch 1V/okt signals over multiples to
many destinations as i do allways do.

Now ilike to have a second one or maybe two more.
i thought when use it to patch FM it might be good to have the Voltage
Adding very precise.

Regards,
H.


--- In Doepfer_a100@yahoogroups.com, "Doug" <dougc356@...> wrote:
>
> Speaking of being *very* useful, what is this thing exactly? Just a 
> precise mixer intended for CV? What is the main application? Adding 
> pitch modulation to a keyboard CV?
> 
> Thanks,
> Doug
> 
> 
> --- In Doepfer_a100@yahoogroups.com, "hemi_ch" 
> <modulardudeldidum1@> wrote:
> >
> > my A-185-2 has a difference of 2cents ( tonal) between the 
> different
> > switches.
> > this seems to be too mutch for me to name it "precision" Adder.
> > I hoped that i can trim this difference away.
> > 
> > when i think that 1 Volt is divided by 12 to get semitones,
> > 2 cents (of a Semitone) is not much in Volts.
> > I think this 0,1% matching is then not enough.
> > 
> > The Module is _very_ useful for me.
> > Matching to 0,01% and paying finally a littlebit more would be the
> > better Deal at the end,
> > IMHO.
> > 
> > 
> > thanks
> > H.
> > 
> > 
> > --- In Doepfer_a100@yahoogroups.com, <hardware@> wrote:
> > >
> > > > Hi,
> > > > as sayed in the title i like to calibrate my A-185-2 
> precission adder.
> > > > It is not exactly 1V and not all Voltage adders are exactly 1V.
> > > > ( no, this is no critsm )
> > > >
> > > > I must calibrate my VCOs and i like to have the precision 
> adder as a
> > > > reference.
> > > > I see there are only two trimmers.
> > > > some explanations would be appreciated.
> > > > thanks
> > > 
> > > P2 on top right edge of the pcb is used to adjust the 1V coming 
> from the
> > > switches if nothing is connected to the sockets.
> > > P1 in the lower section of the pcb is used to adjust the overall
> > > amplification. There is no trimming potentiometers for each 
> inputs
> > as the
> > > resistors in the input stages are manually selected to 0.1% by 
> our
> > > manufacturer. Consequently the difference between the different 
> inputs
> > > should be less than 0.1%.
> > > 
> > > Best wishes
> > > Dieter Doepfer
> > >
> >
>

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