Odp: Odp: [sdiy] More ground questions
harry
harrybissell at prodigy.net
Thu Aug 8 03:21:57 CEST 2002
No like.... the STANDARD is blue tape for the open cords....
;^P
H^) harry
Tim Ressel wrote:
> 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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