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Originally Posted by
ukpartydj
Oddly enough I've plugged everything in at home and there is no noise!
Starting to think that maybe it's more an issue with one of my extension leads or even the main supply at the hotel I was working at.
I didn't check the ground on the plugs at the hotel because I checked them a few months back and regularly go there.
I've managed to eliminate -
Mixer
Soundcard
Cables
Power supply to laptop
I've tested a couple of my extensions and they are fine so it's either one of my extension cables or the venue that has the faulty ground I would assume.
I think that the purchase of a ground loop isolator would be a hell of a lot cheaper than a complete rewire of the venue!!
Dazzy D
Lightning Disco & Entertainment
Born to make you party!
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Originally Posted by
ukpartydj
Oddly enough I've plugged everything in at home and there is no noise!
Starting to think that maybe it's more an issue with one of my extension leads or even the main supply at the hotel I was working at.
I didn't check the ground on the plugs at the hotel because I checked them a few months back and regularly go there.
I've managed to eliminate -
Mixer
Soundcard
Cables
Power supply to laptop
I've tested a couple of my extensions and they are fine so it's either one of my extension cables or the venue that has the faulty ground I would assume.
As others have mentioned, a ground loop isolator is a cheap and guaranteed fix for your problems.
That will ensure that you wont have the problems in other venues as well.
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Originally Posted by
Kernow
But your issue (and I'm pretty sure the clients too) revolves around sound, not the lightshow ?
Hope you get it sorted
HA HA! ... ... ...
Originally Posted by
DazzyD
I think that the purchase of a ground loop isolator would be a hell of a lot cheaper than a complete rewire of the venue!!
Not my problem lol
Originally Posted by
katman
As others have mentioned, a ground loop isolator is a cheap and guaranteed fix for your problems.
That will ensure that you wont have the problems in other venues as well.
Yer I might as well buy one or two, I am just very curious to what the problem actually is... even if it was the venue one of my laptops didn't make a noise and the other did it seems like a cheap and easy fix but I won't be happy until I know where the hell the noise is actually coming from!!!!
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I HAVE THE ANSWER!!
The issue is not the venue's, not my extention leads but the charger itself.
I swapped a laptop charger with another charger, exactly the same voltage and hertz on the back (Always check the output figures on your mains adapters - I've destroyed a TV by plugging an incorrect lead in before).
And there is no hum hiss or anything, whichever laptop this particular charger is plugged into it will make it hum or hiss through any of the USB ports or headphone jacks!
Solved and no need for Ground Loop Isolators!
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Originally Posted by
ukpartydj
I HAVE THE ANSWER!!
The issue is not the venue's, not my extention leads but the charger itself.
I swapped a laptop charger with another charger, exactly the same voltage and hertz on the back (Always check the output figures on your mains adapters - I've destroyed a TV by plugging an incorrect lead in before).
And there is no hum hiss or anything, whichever laptop this particular charger is plugged into it will make it hum or hiss through any of the USB ports or headphone jacks!
Solved and no need for Ground Loop Isolators!
I suspect that your old charger had the earth pin (connector like a 3 leafed clover), whilst you're new charger is double insulated...hence no earth what so ever?
Tel:0800 990 3030
The opinions here are those of an individual and not necessarily those of Dynamic Entertainment.
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Originally Posted by
Dynamic Entertainment
I suspect that your old charger had the earth pin (connector like a 3 leafed clover), whilst you're new charger is double insulated...hence no earth what so ever?
Whilst that would make sense both chargers are the clover type hence they both have earth - I personally cannot see any logo / detail on the back that indicates they are different in any way so I'm assuming that one charger is prehaps of a lesser quality or simiply doesn't have something the other one does
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Tel:0800 990 3030
The opinions here are those of an individual and not necessarily those of Dynamic Entertainment.
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Dinosaur
Originally Posted by
ukpartydj
- I personally cannot see any logo / detail on the back that indicates they are different in any way
If I remember correctly, the symbol for double insulated is one square inside another square. You can check if the earth is connected in the mains lead very easily with a multimeter.
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Originally Posted by
Dynamic Entertainment
Pass....the earth wire is connected to the pin in the plug on the second one isnt it?
Ive seen some do a custom ground lift with that technique
Both chargers have 3 pins which seem to connect at the clover male and female & at the wall plug so I'm assuming both are grounded.
They are both Dell chargers which came with the laptops when purchased although the one that causes the hum and hiss is a funny shape (thin and flat rather than a mini brick).
Just done a few more tests just to see if I can get to the bottom of this - the hum and hiss never happens at home regardless of the charger however the last 2 venues I've played I have tested it before setting up and it has caused the sound.
Very bizzare but the good charger is the one thing that constantly solves the problem, been reading other online suggestions and quite a few people have mentioned it's the charger also.
From what I understand the ground loop issue is when their is 2 items or more which are grounded, they are connected together and the noise is where the appliances cannot decide which ground to use.
Originally Posted by
Excalibur
If I remember correctly, the symbol for double insulated is one square inside another square. You can check if the earth is connected in the mains lead very easily with a multimeter.
I may try and dig out my multimeter to check but the double insulated logo isn't on the charger.
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Even if the PSU did have an earth it wont on the DC side, the problem is caused by the power supply smoothing circuit basdically cheap or underated capacitors in the DC circuit, a psu with better regulation will cause less hum it's as simple as that. The sign as someone said for double insulated is a square inside another square, but regardles of insulated or double insulated the DC side will not be conendcted to earth.
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