[sdiy] Seperate Grounds

[harry]

Hi Mark... (inline)

Mark Melvin wrote:

> Harry-
>
> Still clearing... and this time posting to the list in
> case someone else might benefit...
>
> > Signal Ground (to me) is the ground of all audio
> > inputs and
> > outputs. It MIGHT include some CV grounds as well...
> > unless they are
> > "noisy"...
> >
>
> OK, but are you talking about patch points now?

Yes...

> On my
> synth it's mostly banana jacks.

Then there will be no 'ground loop' possible... the reference will be from
the
ground between the modules... as long as THAT is kept clean... ;^)

> I have a couple of
> 1/4 inch and mini connectors for external connection
> but that's it.  Is this my only Signal Ground?

No... the path shared by the individual modules is a signal ground as
well...
AND the 1/4" and mini connectors.

The biggest part of the trick is to run all the high current / dirty grounds
back
to the low impedance point (usually the junction of the two main filter
caps...
or close to there)... separate from the low current / clean grounds.

Usually you either HAVE a problem... or not. The bigger the system, the
bigger
the risk, and  the more effort you need to put up front.

H^) harry

>
>
> Thanks!
> -Mark
>
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