Odp: Odp: [sdiy] More ground questions

[Roman]

But jack ground is never connected with circuit
ground at any module. They both meet at power
supply only. If there's no source of current flow
in jack's ground network besides RF pickup,
it shouldn't affect the signal. Am I right?

Breaking cable shield on one end seems to be easy
solution to all ground problem. However sometimes
I like to use a patchcord to connet to some output
device, being at the moment MSP5 standing on top
of modular case. I'm sure I'd be pissed off why all
I get is hum in the speaker, not remembering which
cable has one-ended shield.

Roman

----- Original Message ----- 
From: Tim Ressel <madhun2001 at yahoo.com>
To: Roman <modular at go2.pl>; <synth-diy at dropmix.xs4all.nl>
Sent: Tuesday, August 06, 2002 8:54 PM
Subject: Re: Odp: [sdiy] More ground questions


> Roman,
> 
> If module A is connected to module B, and mod B has
> some high-current digital switching going on, and the
> two are connected with a patch cord with thru ground,
> the the digital switching current might wind up on the
> patch cord shield, and impinge itself on the signal
> conductor. No amount of beefy grounding on the noisy
> module will guarantee success. The best thing is to
> break the shield wire in the patch cord so ground
> currents cannot flow.
> 
> Actually, the BEST thing would be to go balanced on
> the connections. A little extra cost, which you might
> be able to deduct on your taxes as insurance...
> 
> --TR
> 
> 
> --- Roman <modular at go2.pl> wrote:
> > 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
> >