Buzzing over pa when laptop power lead is plugged in

[Jays karaoke]

Hi, I'm after some advice for a friend as I have never come across this.

When The power supply for the laptop is plugged in he get's a very annoying buzzing sound over the speakers, but when he takes out the power lead it stops. can you guys suggest what he do please to eliminate this as i am stuck.

Thanks

Jay

[rob1963]

A ground loop isolator should do the trick.

[Jays karaoke]

thanks Rob

[Excalibur]

The learned Mr James is correct in his suggestion.

[rob1963]

thanks Rob

No problem Jay.

They're only a few quid.

The learned Mr James is correct in his suggestion.

I think that's the first time I've been described as learned by a forum member...so I'm going to enjoy the moment.

Thanks Peter!

[sweetie]

they are only a fiver on www.disco-world.co.uk

[Alchemy]

Spot on Rob, I had exactly the same problem and this http://cgi.ebay.co.uk/GROUND-LOOP-IS...item5ad3eb6afc
solved the problem.

[notroubleclubber]

Ive used the above one when recording mixes live to another pc and it stopped it. Havent tried it in a live situation yet but cant see there being any probs.

[8x18]

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[Excalibur]

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Aaaaaaaaaarrrrgggghhh you can't say that!. Yes it works, no it's probably not unsafe, cos the gear's probably double insulated, but earth cables are safety items, and you can't suggest removing them.