Archive of the former Yahoo!Groups mailing list: MOTM

previous by date index next by date
previous in topic topic list next in topic

Subject: Re: Power distibution in Bill and Will's medium size Synth

From: "wjhall11" <wjhall@...>
Date: 2007-02-20

Richard - ah - thanks so much for clarifying - my use of
"interference" was imprecise to be sure - I was using it in a very
broad sense.

We're new at this and we really appreciate your advise.

OK - well - we are also trying to be proactive - and because of that,
we probably will add another 900 eventually. That means we need to
anticipate space for it, of course.

We're also considering moving to a somewhat narrower 39 inch wide
three-tier layout for our synth as opposed to our original 48 inch
wide two tier design. This will leave more space for expansion, make
patching a little easier, and make the power supply seperation of
digital vs other modules a little easier to do in the context of our
layout - just in case it becomes an issue.

Thanks so much again.

Bill and Will



--- In motm@yahoogroups.com, Richard Brewster <pugix@...> wrote:
>
> I don't remember what I may have said about interference between
> modules. I did try to follow some advice from Ken Stone and separate
> out digital type modules -- especially modules like the CGS Burst
> Generator -- onto a separate power supply. These are collected in a
> cabinet oriented toward digital, having sample and holds, noise, pulse
> dividers, and so on. In actual practice I have not encountered any
> "interference" type problems; I was just being proactive.
>
> Since your list is all MOTM, and since these are just about the lowest
> noise modules around, I don't think you have much to worry about. But
> make sure you can swap your modules around. Then, if you ever do
detect
> interference (noticeable, audible interference that you can relate to
> some event, such as a sample and hold being triggered), you will be
able
> to move modules to share different power supplies, which could address
> the issue.
>
> Richard Brewster
> http://www.pugix.com
>
> wjhall11 wrote:
> > There's no doubt that we're pushing the limit... and if we want to add
> > more modules - well - we'll need more power.
> >
> > So here's our question:
> >
> > GIVEN THAT
> > - although using the two power supplies may be OK during construction
> > and initial testing of our synth
> >
> > AND GIVEN THAT
> > - we think we ultimately need to add an additional 900 power supply
> >
> > HOW do you recommend
> > - we connect the above modules to the (2) 900s and (1) 950 to minimize
> > the interference mentioned by Richard Brewster?
> >
> > Thanks much.
> >
> > Bill and Will
> >
> >
> >
>