Question about ION Audio TTUSB10 Turntable

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Ion worked fine; got new computer, now there is a buzzing sound when plugged in to the turntable; what to do?

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  • davidmcregge Aug 30, 2010

    thanks midwest-tek; it worked using the power strip on my dell inspiron; before i had the ion turntable plugged into the back of a gateway, but dell doesn't have that. thanks again.

  • davidmcregge Aug 30, 2010

    yes it was a grounding problem, thanks

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This is a 99% of the time a grounding issue. It is called a "Ground Loop" This means either the new computer is not properly grounded, either to if its a laptop which 8/10 the usb/soundcards are never grounded correctly. or if its a desktop, most of the time the power supply is not always grounded to the case correctly. This happens because Audio and video systems need a reference point for their voltages. Generally referred to as common or ground, although it may not be actually connected with the earth, this reference remains at "zero volts" while other signal voltages "swing" positive (above) and negative (below) it. Physically, the common may be a wire, a trace on a printed-circuit board, a metal chassis, virtually anything that conducts electricity. Ideally it should be a perfect conductor, but in any practical system it is not. As the complexity and size of the system is increased, the imperfect conductivity of the common (ground) conductor inevitably causes problems.
First thing i would try is if its not plugged into a grounded power strip, Get a surge protecting power strip and plug the computer and turntable in there. Now next one is a little more scary then anything else. On my dj setup i do not have a proper ground thus have the same problem you have which requires me to use a cheater plug. You know the 3 prong to 2 prong outlet. Thus removing the ground completely. This is not recommended to do all the time but i only do it when i want to use my turntables.
First try the power strip and have both the turntable and computer plugged in to see if this helps solve the problem. If it doesnt try the 3 to 2 prong outlet. If the cheater plug fixes the problem please let me know and we can go from there on how to properly ground the unit. Please also when you provide feedback let me know what model computer it is, so i can properly assist you. For more information to reference the problem here is a write up on ground loop isolation. Thanks, Midwest-tek

Posted on Aug 28, 2010

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Check to make sure that there are no breaks of your ground between the turntable and the wall outlet.
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Here are some other points that are important
Important: All of the power in your computer and sound system should be connected to the same phase of the breaker panel in your house If it goes into the same wall outlet. that is best.
This ground issue is important in turntables.
This may not be the problem, but it certainly is very possible.
I worked in professional sound system design for recording studios and large venue (concert) sound systems.
Whenever possible, these folks require the power to be from a unified phase and source point. on Otherwise they have serious hum issues.
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