Odp: [sdiy] More ground questions

[Roman]

I'd like to add one comment/question to this
thread.
What if all jacks' grounds are connected together
at the panel, all panels connected with cabinet
rails,
and all of this is connected to signal ground at
power
supply only?
I have done it this way and it seems to work good,
although my modules count isn't impressive, so I
can't
tell for sure. Basically I treat modules as they
would
be connected with bananas, but instead I'm using
1/4'' TS. Any ground loops made of patchcords
shouldn't cause problems, should they?

Roman

----- Original Message -----
From: Scott Stites <scottnoanh at peoplepc.com>
To: <synth-diy at dropmix.xs4all.nl>
Sent: Tuesday, August 06, 2002 5:41 AM
Subject: Re: [sdiy] More ground questions


> Thank you all for the thoughts and discussion,
on-list
> and off, on grounding techniques and pitfalls.
I feel
> better armed now to go ahead and design the
cabinet,
> and a better understanding of what to do if I
run afoul
> of noise in the system.
>
> *Obviously it appears that a lot of problems can
be
> headed off in the module design itself.
>
> *A star ground ground looks to be a good
> implementation.
>
> *Ground is best if all points meet at the
'ocean'
> (coupling caps in the power supply).
>
> *Shielded cables for audio and CV signals must
be
> considered in the design.
>
> *'Dirty' and 'clean' power supplies can be used
for
> 'dirty' and 'clean' signals with 'dirty' and
'clean'
> grounds for the respective power supplies
(sounds
> especially helpful if a number of LED's will be
used).
>
> *Isolation of connectors on module panels
through the
> use of non-conducting shoulder washers is
something
> that can be tried as well.
>
> I appreciate the information greatly. This list
rocks!
>
> Scott Stites
>
>
> ====================
> Ken Stone wrote:
>
>
> > >...if the rest of the design and grounding
is done
> > correctly as well.
> > >In most cases the builder will blow the
concept
> > somewhere and get no
> > >benefit.
> >
> > Often as soon as a patch cord is plugged in
between a
> > clean and noisy
> > module, you've blown it anyway. :)
> >
> > I think a good way to separate LEDs from
ground is to
> > run them between + and
> > - rails - on separate "noisy" power
rails.
> Ground can
> > stay shared that way.
> >
> > Ken
> >
>
__________________________________________________
_____________________
> > Ken Stone   sasami at hotkey.net.au
> > Modular Synth PCBs for sale
> > <<a
>
href="http://mail.peoplepc.com//jump/http://www.bl
aze.net.au/~sasami/synth/&gt">http://www.blaze.net
.au/~sasami/synth/&gt</a>;
> > Australian Miniature Horses & Ponies
> > <<a
>
href="http://mail.peoplepc.com//jump/http://www.bl
aze.net.au/~sasami/&gt">http://www.blaze.net.au/~s
asami/&gt</a>;
>
> ________________________________________________
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