laptop AC adapter noise

Andy Sandoval · Post by **Andy Sandoval** » 5 Sep 2005 1:20 am

I'm using a laptop with band in a box to practice with. How can I eliminate the noise through my amp caused by the power supply from the laptop?

John Daugherty · Post by **John Daugherty** » 5 Sep 2005 8:43 am

Andy, is the noise a hum,or hash(buzzing/crackling)?
You should not be hearing any noise. First, make sure you are using a good cable between the computer and the amp. If there are any adapters in the audio connections,make sure they are good. Is there a battery in the computer? If the computer AC adapter is not terminated by a battery, you could get noise.
If it is a 60hz hum you will have to eliminate ground loops. That is another area to explore if the noise is a hum and cables do not correct the problem. Let us know what you find and post the info...........JD

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www.phelpscountychoppers.com/steelguitar

Glenn Taylor · Post by **Glenn Taylor** » 5 Sep 2005 3:59 pm

I had that problem--when using the computer's battery, no hum. When plugged in to AC, lots of hum. I put a ground lift on the end of the computer power cord. No more hum.

Andy Sandoval · Post by **Andy Sandoval** » 5 Sep 2005 5:36 pm

Glenn and my friend Larry get the cigars today. That cured the problem "lickety split" Thanks guys for all the tips...back to some noiseless steel playin.

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55' Fender Stringmaster T8, 54' Fender Champion, Carter D-10, two Oahu laps, two National laps, and two Resonators