Questions of grounding more info

First of all im going to talk about my setup. (If its even rellivent)
I have my desktop with my 2 computer speakers on and the screen in the middle. To the right of these speakers (on the desktop), I put the 'ART USB Phono' preamp. Trendy top is from him to the PC USB cable.
I use 'Line In' on the preamp with cables that go from the 'Phono' out on the turntable.
The Platinum is on another office to the right of the mine, the turntable is placed between 2 big 'Behringer' speakers (monitors) but theyre off! If the deck is about a metre or 2 to the right of the PC on a desk different control.

In any case, I went to register this morning of vinyl and even before to play the recording, I was getting a REALLY loud staticy interference noise. Has proved that it was the USB cable to the back of the preamp, so I unplugged/replugged it in and I was getting more static. First of all, what's happened? Was - it USB cable touch other cables on my floor or what?

I did not upgrade to the Earth only because I don't know how it works and how to properly put in place...

I don't know if the wire would be the preamp stage then to pc? Or the turntable to PC then another Earth wire of the preamplifier to the PC? How would this work?

Please help guys...

Thank you very much.

Hmm... When it comes to cable signals, the ground is not the easiest thing in the world, however you look at it.

The continuity of the Earth (or ground) in your system will ground turntable to the preamp, and from there to the PC via the USB cable. The cable itself has a shielded external connection, and which is attached to the case of jams. Any breach of this string (even just a slightly loose Cableusb) will give rise to the kind of static type noise that you got. The whole system is not be connected directly on the ground to work either - it's the connections that are important from a point of view of signal. Often, just having connections to earth potential signals about is sufficient when it comes to screening of interference.

Additional ground would help? Answer is - very probably not. The reason is that if you join some of this equipment as well as separate ground connections, you create two paths to a common ground rather than just the one that you had earlier. And it takes very little of potential difference between the points of connection in fact to create what is called a "loop of UM ' (or ground loop) which will put in place more noise there is in the first place!

Unfortunately, the Earth and signal security requirements lead screening pretty much conflict with each other - 'good' security invariably land causes hum loops unless you cut one end of each cable between each piece of equipment and rely on the receptacle grounding to provide the common point. Problem with that is that if you unplug an in-between of feeding equipment, you've broken the chain of signal grounding and you could easily end up with massive hums who has no intention of. That is why all sensitive material to the shield of the issues (such as your turntable) has a separate ground between her connection and upstairs preamplifier with the really sensitive part, isolated within the hub. Little separate wire that goes to the floor on the preamp is the only connection, you must use the land. But it creates this reference to the ground must be connected to the Earth of your PC, and happens via the USB screen.

So if you want to try an arrangement separate from the ground, the only place where you could possibly get an advantage (only with the possibility of introducing some UM, as mentioned above) is having a connection separated between the Terminal on the preamp USB Earth with your PC - just a piece of wire is attached to the case; at least it could overcome the problem of loose screen on the USB cable connection. But quite frankly, change anything else is just as likely to cause problems such as cure them.

If you experience, so whatever you do, do not try to remove any safety ground connection in the power outlets to get rid of hum, as some people do. It's simply asking trouble of the kind that you don't really want. There are always better solutions than that.

Tags: Audition

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