You have to be a bit careful as the 1200 mA rating is not altogether accurate. It depends how hot your system is - is it on stage under lights, is it in a closed flightcase, is it in a studio rack with valve gear or Mytek converters underneath it

Also, it's not a case of the PSU working 100% perfect until the current demand reaches 1200 mA and then failing. It might overheat, blow a fuse or just fail at 1200 mA but it will also exhibit some variable behaviour the closer to the maximum it gets. Whilst you won't necessarily notice any problem with ADSRs or LFOs, you will start to notice this especially on Oscillator pitch as the ear is very sensitive to fluctuations in pitch.

The accuracy and measurement conditions of current consumption can also differ between manufacturers, so it's not always as easy as adding up the numbers. This might not matter now, but you will eventually end up buying other modules.

It pays to have more than enough power.

All the best
Sean

--- In Doepfer_a100@yahoogroups.com , "Raul" <raulpena1974@...> wrote:
>
> Thanks for that. Im putting together all the calculations.
> One thing I noticed though is all the modules i own together add up to 1200 mA, however this is across 12U in two G6 cases. So well within the range.
> I'm finding it hard to imagine how one could run over the rating when using Doepfer modules.
> The highest power requirement for a module in my system is the A188-2 at 120mA. But even if someone placed 4 of those in case at 480mA that's well below power requirements. I hope I am calculating everything correctly.
> Perhaps this next question is too open,
> What are some situations where one might exceed the power
> So I know what to avoid.
> Thanks.
> Raul
>
>
> --- In Doepfer_a100@yahoogroups.com , Jakob Paulussen <jakob.paulussen@> wrote:
> >
> > Hi Raul,
> > The Doepfer A-100 manual has a chart telling you the amount of mA of each
> > module. Just add the mA amounts hooked to one power supply. Regardless if
> > you run 1 our 4 busses with one power unit. It's the amount of mA each of
> > the attached consumes.
> > Best wishes
> > Jakob
> > Am 29.01.2012 13:26 schrieb "Raul" <raulpena1974@>:
> >
> > > **
> > >
> > >
> > > Hello group. I'm a bit baffled or naive by the distribution of power in
> > > the two different cases. I'm thinking of upgrading and just wondered if I
> > > need to be more selective and calculating when adding modules
> > > Up until now i have had 2 G6 cases, and within them I have had various
> > > arrangement of my 90% Doepfer modules.
> > > I know the upper limit of my power supply PSU2 is 1200ma rating.
> > > Perhaps I am overthinking this but how does the larger case with the third
> > > busboard still support more modules
> > > I feel if I understand this a little better I may lean in one direction
> > > versus another.
> > > Any tips ,rules of thumb, or advice would be useful to me. Thank you.
> > >
> > > Raul Pena
> > >
> > >
> > >
> >
> >
> > [Non-text portions of this message have been removed]
> >
>