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Any electrical engineers on Lush?

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Liz
Scarlet Seductress
On the off chance there are a few Lush members who are electricians/electrical engineers, I thought I'd ask about a possible grounding issue.

I've got a guitar amp (connected to a cabinet) plugged into the mains on one side of a room. On the other side of the room I have a 6-way extension with various Macbook and iPhone chargers plugged into it. When the amp is turned on, I get a buzzing noise through the cab when I touch the metal connectors on the laptop/phone chargers.



Assuming there must be some sort of interference travelling through the mains wiring behind the wall between the sockets, I bought a multipack of Clip-On EMI Filter Magnetic Ferrite Rings in different sizes and clipped them onto all of the power and charging cables. This didn't resolve the issue.



Could the problem be caused by a 3-pin plug that has been wired wrong? Or perhaps one of the wall sockets?

Any advice would be appreciated!

Liz
browncoffee
Coco Pop
Top tip. You must wear clothes while dealing with such equipment, otherwise even inanimate objects are distracted and awed. Hence the wistful 'buzzing' sound.
coffeekid63
Advanced Wordsmith
Ok lots to consider,

1. Has this always been a problem or did it start after you added something? Can you unplug something and get it to stop?

2. Does your amp have a ground lift? (generally on the back somewhere) try switching it on and off

3. How old is the wiring in the house? Some older wiring isn't as shielded and more susceptible to interference from things like DC transformers, neon lights, florescent lights and things like that.

4. Assuming they are on the same circuit because they are in the same room try running a heavy duty extension cord to another part of the house.

5. Try a power strip with a power scrubber in it, they help "clean the power" and can help with some of those issues.

I'm not an engineer or an electrician but have been around this block many times, but I think if your not wearing any clothes or playing in your undies your confusing it for a yummy sound.
noll
"insensitive prick!" – Danielle Algo
Quote by Liz
On the off chance there are a few Lush members who are electricians/electrical engineers, I thought I'd ask about a possible grounding issue.

I've got a guitar amp (connected to a cabinet) plugged into the mains on one side of a room. On the other side of the room I have a 6-way extension with various Macbook and iPhone chargers plugged into it. When the amp is turned on, I get a buzzing noise through the cab when I touch the metal connectors on the laptop/phone chargers.



Assuming there must be some sort of interference travelling through the mains wiring behind the wall between the sockets, I bought a multipack of Clip-On EMI Filter Magnetic Ferrite Rings in different sizes and clipped them onto all of the power and charging cables. This didn't resolve the issue.



Could the problem be caused by a 3-pin plug that has been wired wrong? Or perhaps one of the wall sockets?

Any advice would be appreciated!

Liz


If a three pin socket or plug would be wired wrong, wouldn't that trigger the ground fault circuit interrupter? Oh, and I'm not an electrician/electrical engineer ;)

I's say put a little piece of tape around the connecter part that causes the buzz when touched.


===  Not ALL LIVES MATTER until BLACK LIVES MATTER  ===
Liz
Scarlet Seductress
Quote by coffeekid63
Ok lots to consider,

1. Has this always been a problem or did it start after you added something? Can you unplug something and get it to stop?

2. Does your amp have a ground lift? (generally on the back somewhere) try switching it on and off

3. How old is the wiring in the house? Some older wiring isn't as shielded and more susceptible to interference from things like DC transformers, neon lights, florescent lights and things like that.

4. Assuming they are on the same circuit because they are in the same room try running a heavy duty extension cord to another part of the house.

5. Try a power strip with a power scrubber in it, they help "clean the power" and can help with some of those issues.

I'm not an engineer or an electrician but have been around this block many times, but I think if your not wearing any clothes or playing in your undies your confusing it for a yummy sound.


Dude. Excellent ideas!

It's always been a problem and the wiring I'm sure is pretty old. Probably at least 50 years.

Gonna try the extension cord first to see what happens.
coffeekid63
Advanced Wordsmith
How did you make out ? anything work?
silveranode
Active Ink Slinger
You wear green under your braid.
I used to wear purple.
If all else fails, I call you when the lights go out and we can't get feed from the MSB.
I also used to have problems where 'Greenies' couldn't diagnose bearing failure in a 415VAC 3PH motor until the bearing collapsed and went down to earth.