Interference From Home Hub

[Perry]

I am getting interference through my amp from my BT Home Hub

I've tried different sockets, some not as bad as others but still too bad to play at home.

Has anyone else had this problem?

[markstuk]

Is the interference from the power supply or the wireless? If it's from the wireless, changing the channel might help (assuming it's not 802.11N)...

[Perry]

[quote name='markstuk' post='1074409' date='Jan 1 2011, 02:42 PM']Is the interference from the power supply or the wireless? If it's from the wireless, changing the channel might help (assuming it's not 802.11N)...[/quote]

It's from the power supply.

[Blademan_98]

[quote name='Perry' post='1075085' date='Jan 2 2011, 10:43 AM']It's from the power supply.[/quote]

Get something like this:
[url="http://www.maplin.co.uk/Module.aspx?ModuleNo=394058"]http://www.maplin.co.uk/Module.aspx?ModuleNo=394058[/url]

They clean the signal.

Use it on the phone power supply.

Brian

[flyfisher]

Might be cheaper to replace the hub power supply. You could try calling BT and ask for a replacement; I'm not sure of the warranty situation but they might even send you one for free, especially if you explain that it's causing interference to your other audio equipment - they probably get them for a few pounds given the volumes they buy.

If the problem really is conducted interference, then adding some ferrite cores to the amp mains cable might also help, or even cure.
[url="http://www.maplin.co.uk/module.aspx?moduleno=32799"]http://www.maplin.co.uk/module.aspx?moduleno=32799[/url]

Swapping things can also be helpful in tracking down the source of a problem, although that's often easier said than done. But, in this case, if you know anyone else with a BT home hub then it would be worth swapping power supplies if you can.

Also, do you have, or can borrow, another bass amp to see if that is also affected?

EMC problems can be tricky to solve (especially without fancy test equipment) and it's often just a case of trying various things, or combination of things, to eliminate the problem. Also, be aware that the "fault" might be spurious emissions in one piece of equipment or unexpected susceptibility in the other, or a combination of the two - which is why it's called ElectroMagnetic [u]Compatibility[/u].

[Perry]

The hub also connects to the mains ciruit via ethernet cable an the can be recieved in any room. That's the bit I think is giving me the grief.

[RobJF]

[quote name='Perry' post='1075558' date='Jan 2 2011, 06:22 PM']The hub also connects to the mains ciruit via ethernet cable an the can be recieved in any room. That's the bit I think is giving me the grief.[/quote]
That will be it, for sure. Route the amp power through the Maplin "mains conditioner" already mentioned and Bob's your uncle. I'd think.

[flyfisher]

You mean it's one of those 'ethernet over mains' powerline thingies?

Part of my home network runs over the mains wiring using a couple of Netgear units but I've never had any interference problems with anything else plugged into the mains - Bass amps, hi-fis or radios.

Of course, that doesn't mean your amp isn't having problems but it does suggest it's the amp's susceptibility that's the problem rather than the home hub itself. Poor mains filtering in the amp PSU perhaps?

I agree with trying some sort of mains filters.