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  #1  
Old 25-01-2019, 11:13 AM
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Laptop buzzing when amplified.

I use my laptop a lot for when Im gigging and djing etc. Lately it has developed a very strange buzzing/ interference type noise when plugged into the p.a.

I have checked the leads etc and when I plug in other stuff and other laptops to the p.a. the sound isnt there, so this is definitely the laptop.

Any experts out there got any ideas please?
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Old 25-01-2019, 11:16 AM
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Usually cables or the output socket on the laptop.
Have you tried plugging it into a different pa or amplifier to see if the same problem occurs?
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Old 25-01-2019, 11:18 AM
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Quote:
Originally Posted by Maidstoned Eagle View Post
I use my laptop a lot for when Im gigging and djing etc. Lately it has developed a very strange buzzing/ interference type noise when plugged into the p.a.

I have checked the leads etc and when I plug in other stuff and other laptops to the p.a. the sound isnt there, so this is definitely the laptop.

Any experts out there got any ideas please?
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Old 25-01-2019, 12:40 PM
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Originally Posted by CT_Palace View Post
Usually cables or the output socket on the laptop.
Have you tried plugging it into a different pa or amplifier to see if the same problem occurs?
Yep. Like i said its not the cables. After a google it seems I may have a ground loop prob...especially as it stops when I unplug the power cable.

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Old 25-01-2019, 12:41 PM
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Quote:
Originally Posted by Maidstoned Eagle View Post
Yep. Like i said its not the cables. After a google it seems I may have a ground loop prob...especially as it stops when I unplug the power cable.

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Can you try another power cable/transformer?
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Old 25-01-2019, 12:43 PM
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Quote:
Originally Posted by Maidstoned Eagle View Post
Yep. Like i said its not the cables. After a google it seems I may have a ground loop prob...especially as it stops when I unplug the power cable.

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You can buy ground loop isolators to solve that
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Old 25-01-2019, 12:52 PM
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Can you try another power cable/transformer?
I'll gove that a go.
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Old 25-01-2019, 12:52 PM
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Originally Posted by CT_Palace View Post
You can buy ground loop isolators to solve that
Cool, I will have a look. Cheers
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Old 25-01-2019, 12:58 PM
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I agree with CT its always the ground that's a problem when it comes to laptops.
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Old 25-01-2019, 01:02 PM
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Old 26-01-2019, 01:43 AM
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This place does a ground loop isolator but its not that cheap. I haven't tried it but have bought one of their DACs which is very good.
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Old 26-01-2019, 10:14 AM
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I use this between the laptop and mixer and it works.
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Old 28-01-2019, 10:02 PM
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I use this between the laptop and mixer and it works.
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Just bought that one, thanks.
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Old 31-01-2019, 02:48 PM
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No need for that. Just remove the earth lead from its connection to the plug socket. Trust.
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Old 31-01-2019, 03:33 PM
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I recently got a couple of new dual-usb high power fast chargers for my phone(s), pads, USB headphones, etc. etc. etc.

Problem is that when I listen to my phone audio through wired 3.5mm in-ear phones while the phone is charging I get a really annoying mains buzzzzzzzz.

Can I use one of these 'Ground Loop Isolators' to get rid of it?

There's a few for around 5 etc. on Amazon...?
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Old 31-01-2019, 03:41 PM
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Old 31-01-2019, 03:59 PM
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No need for that. Just remove the earth lead from its connection to the plug socket. Trust.
Or ideally put it through an extension lead where you've done this.
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Old 31-01-2019, 04:01 PM
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Old 31-01-2019, 04:04 PM
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Put your tongue on it to test it
I got a mate round to test it.

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Old 31-01-2019, 09:56 PM
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Lol I was only just sent a similar video on what's app this evening. Stupid tart ended up knocked out. Fubar.
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