Humming From Grounded Turntable

[ashor]

Good Evening, All

First and foremost, I would like to thank everyone for their input. I never expected so many replies. 😀

I currently have the pre-amp reconnected and have removed the grounding wire altogether. The result is a much fainter hum and I suspect it's as good as many - particularly as there are other electrical items in reasonably close proximity - so I don't think getting rid of it completely is realistic.

It's certainly much much better than it was and no way near as noticeable at the sort of volumes I use. That said, I still have some suggestions to tinker with (thanks to you lot 👍) and tinker I will, until I've exhausted them all.

I also came across this on the Fluance website, so this has gone on the list and I'll give it a go when I have another grounding wire:

Fluance Support Center

TWO grounding wires...who knew?!

I'll certainly report back if any further improvement is made but, for now, thanks again for all of your responses. With so much hate and b******* online, it's great to be reminded that there are still those who simply enjoy helping others out.

 

[good_enough]

Good Evening, All

First and foremost, I would like to thank everyone for their input. I never expected so many replies. 😀

I currently have the pre-amp reconnected and have removed the grounding wire altogether. The result is a much fainter hum and I suspect it's as good as many - particularly as there are other electrical items in reasonably close proximity - so I don't think getting rid of it completely is realistic.

It's certainly much much better than it was and no way near as noticeable at the sort of volumes I use. That said, I still have some suggestions to tinker with (thanks to you lot 👍) and tinker I will, until I've exhausted them all.

I also came across this on the Fluance website, so this has gone on the list and I'll give it a go when I have another grounding wire:

Fluance Support Center

TWO grounding wires...who knew?!

I'll certainly report back if any further improvement is made but, for now, thanks again for all of your responses. With so much hate and b******* online, it's great to be reminded that there are still those who simply enjoy helping others out.

Yup that two grounding wires is what I suggest above - get all the kit at the same potential.

 

[ashor]

Yup that two grounding wires is what I suggest above - get all the kit at the same potential.

Yes...I thought that's what you meant.
Cheers!😀

 

[good_enough]

Yes...I thought that's what you meant.
Cheers!😀

You don't need to source any special grounding wire to try - just any old flex or wire wrapped around both grounding posts and screwed down. Sandwiching the spade from the turntable at the pre end. Just anything conductive that will equalise the potential at both ends - there's next to zero current involved.

 

[ashor]

You don't need to source any special grounding wire to try - just any old flex or wire wrapped around both grounding posts and screwed down. Sandwiching the spade from the turntable at the pre end. Just anything conductive that will equalise the potential at both ends - there's next to zero current involved.

I have plenty of speaker cable, so I was going to try that.

 

[Rui]

I also have a AT turntable. I do recall the other week as being classed as landfill turntables by someone on here. I love mine.

at least is better than all Rega, Pro-Ject around 1.000€ and chageable cartridge, head(what i call to where the cartridge is atatched to), on the S-shaped arm. i´ve seen some and they were really ok for today´s market of turntables

 

[Rui]

Well, maybe I wouldn't have done had I known it would be an issue. 🤔

Sorry, it's not wise or it's not dangerous?

Also, I'm very nervous about removing the earth wire.
Isn't that potentially dangerous for someone with no clue about electrics?

I made my house ground conection with a copper rod beaten till it was all inside the earth, and after more than 20 years i didn´t died yet or any of my family, with refrigerator ,hard apliences with need for ground conection to the main electrical board of the house, so a turntable english conection ,the third ground conection on the socket will do nothing ,as the turntable itself doesn´t need ground conection on the electrical socket, my syster lives in london and i´m aware of that, she brings me things and already bought a tool to cut the extra pin, or a adaptor to regular plugs that as no ground, when in the back as a sign of a square with a square inside ,means "don´t conect it to earth", in the back of hi-fi components is seen a lot. Computers, towers, they come new with a extra pin for ground. First thing to do, cut it, even in stores they cut it for you ,is not a big issue

 

[Gray]

....my syster lives in london and i´m aware of that, she brings me things and already bought a tool to cut the extra pin, or a adaptor to regular plugs that as no ground, when in the back as a sign of a square with a square inside ,means "don´t conect it to earth", in the back of hi-fi components is seen a lot. Computers, towers, they come new with a extra pin for ground. First thing to do, cut it, even in stores they cut it for you ,is not a big issue

There's never any need to physically cut the earth pin on a UK plug Rui.

Where you've got that double insulated, square-within-a-square symbol, even if the earth pin is metal, it will have no electrical connection to the appliance.

The symbol is just confirming to you that the appliance is not earthed because it doesn't need to be.

 

[Rui]

There's never any need to physically cut the earth pin on a UK plug Rui.

Where you've got that double insulated, square-within-a-square symbol, even if the earth pin is metal, it will have no electrical connection to the appliance.

The symbol is just confirming to you that the appliance is not earthed because it doesn't need to be.

I´m refering to use that plug in Portugal , where i live, with a device bought in London town, i live in south interior of Portugal , my sister lives in London not me, well i forget that not all know that i´m in Portugal , sorry for that

 

[Gray]

I´m refering to use that plug in Portugal , where i live, with a device bought in London town, i live in south interior of Portugal , my sister lives in London not me, well i forget that not all know that i´m in Portugal , sorry for that

Ah yes - that pin would just be in your way in Portugal - though the remaining two square pins wouldn't be much good to you either, over there, would they?

No doubt you probably just fit a new plug 👍

 

[Rui]

Ah yes - that pin would just be in your way in Portugal - though the remaining two square pins wouldn't be much good to you either, over there, would they?

No doubt you probably just fit a new plug 👍

adaptor, easier than change the plug, are cheap. About components, in the back the symbol ,that is international, says "this aparatus must not be earthed"