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Ac Adapter Buzzing Rf

Discussion in 'Gateway and eMachines' started by Jaycalgary, Jan 28, 2010.

Jaycalgary Notebook Consultant

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Maybe this will help someone. I have a high end headphone setup with my fx7811. I had a problem with a lot of buzzing rf interference but was quiet on battery. I bought a aftermarket ac adapter and was as quiet as on battery. The difference was the aftermarket ac adapter has no ground prong. I swapped cables with the old adapter and the aftermarket ac adapter had the same buzzing rf. So I removed the ground prong from the old adapter and it is quiet. I am now concerned that there may be more risk if there is a power serge?

Jaycalgary, Jan 28, 2010

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InfectedSonic Notebook Evangelist

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you are experiencing what is called a ground loop. there are a couple of ways to get rid of that. the easiest is to use a digital audio device like a usb headset. there are other ways but google can explain it better then i can.

InfectedSonic, Jan 28, 2010

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Jaycalgary Notebook Consultant

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The problem is fixed. I removed the ground prong and now it is quiet. My headphone setup cost about the same as the laptop "soundcard,amp and headphones."

Jaycalgary, Jan 28, 2010

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