Odp: Odp: [sdiy] More ground questions

[Tim Ressel]

So like, red tape for the open cords, and blue tape
for the others??


--TR

--- Roman <modular at go2.pl> wrote:
> 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
> > > 
> 


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