Ground loop

[nbaptista]

I think I have a ground loop in my system(only stereo,no AV or TV nearby).Do you know anything I can do (DIY) to fix it?Buying a filter,for example or something else...
BTW,my amp is allways on,so I don´t have huummm issues anymore,it just happened when I turn on the amp

[WikiBoy]

I think I have a ground loop in my system(only stereo,no AV or TV nearby).Do you know anything I can do (DIY) to fix it?Buying a filter,for example or something else...
BTW,my amp is allways on,so I don´t have huummm issues anymore,it just happened when I turn on the amp

I would try and help you but your post makes no sense.

1 do you know what a ground loop is

2 why do you think you have one

[nbaptista]

1 do you know what a ground loop is

2 why do you think you have one

1 )well , I´ve read a few post´s and Internet
2) when I turn on the amplifier,only sometimes,it appears an huummm trough the speakers during 3 or 4 minutes and after a while,the huuummm disappears!

[Mike]

Doesn't sound like a ground loop then, they tend to be there all the time (or at least when the offending equipment(s) are switched on) and don't just go away when your amp warms up.

Cheers,
Mike.

[WikiBoy]

1 )well , I´ve read a few post´s and Internet
2) when I turn on the amplifier,only sometimes,it appears an huummm trough the speakers during 3 or 4 minutes and after a while,the huuummm disappears!

You have a power supply capacitor breaking down, it needs replacing, see service engineer.

[nbaptista]

You have a power supply capacitor breaking down, it needs replacing, see service engineer.

I´ve called my dealer a time ago and he said to me that probably was a loop earth.What I did next was to disconnect all the other components of my system from the amplifier.So I did a test with only the amplifier connected to the speakers,and then I switch of and on the amplifier again and again and nothing happened.The hhuuummmm was gone!So,what do you think it can be?If were a power supply capacitor breaking down,the huummm still appears,with amp connected to the speakers,no?
BTW,my CD player is a Naim CD 5 with Din,not RCA

[Prince of Darkness]

I am not as knowledgable as Richard, so apologies if I have this wrong.
The faulty capacitor is taking a while to charge up after switch on, therefore is initially failing to properly smooth the D.C. (the hum originates in the A.C. mains). This causes the initial hum. When the capacitor charges up the hum disapears. When the amp is switched off and back on, the capacitor does not have time to discharge so the hum does not reappear.
If the hum had been due to an earth loop it would have remained constant and not disappeared.

[nbaptista]

I am not as knowledgable as Richard, so apologies if I have this wrong.
The faulty capacitor is taking a while to charge up after switch on, therefore is initially failing to properly smooth the D.C. (the hum originates in the A.C. mains). This causes the initial hum.

But why the huummm does not appear when the amp is only connected to the speakers?

[Prince of Darkness]

Is this perhaps a power supply fault in one of the source components?

[nbaptista]

Is this perhaps a power supply fault in one of the source components?

Like in the cd player,for example?