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Old 2nd September 2013, 05:12 AM   #11
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Join Date: Aug 2013
Location: Columbus, OH
Just got done with a wedding and the hum eliminator worked. Took out the ground loop hum

Thanks for everybody's help!

sent from double thumbin' it
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Old 26th September 2013, 01:35 AM   #12
MAAC0 is offline MAAC0  Portugal
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My brother always uses a "ground cut AC plug" on his Vaio laptop, but there are some Laptop PSU´s that work best with ground connected.
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Old 3rd December 2013, 09:17 PM   #13
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We had some laptops give noise when plugged direct to the PA when on AC power, but not when on battery. As it turned out, some of the power supplies made noise and some did not. The noise was due to a component or two in the power supply going out of spec with use and time. Try your laptop direct on batteries, and if possible, with another power supply. Of course, a direct box is the Pro way to connect. I like Radial but they are $$...
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