D
Deleted member 316927
Would someone please help me with diagnosing a problem with internet router interference. I have an Xfinity internet router connected via coaxial cable to the wall and a turntable, preamp, amp, and speakers adjacent to the router. When the router boots up and goes online, the speakers output a low frequency pulsing sound. It is only when the router fully goes online and connects that the pulsation emanates, not before then when the standby light is flashing.
I have no other place to connect the router a good distance from the analog setup and vice versa. I tried unplugging the coaxial cable and the ethernet cable but this has no effect on the pulse emanating from the speakers. Unplugging the router of course solves the problem. At first I thought there was a fan inside the router causing the pulsation but there is no fan; and this sound is similar to what you might hear from some sort of fan interference.
I have no other place to connect the router a good distance from the analog setup and vice versa. I tried unplugging the coaxial cable and the ethernet cable but this has no effect on the pulse emanating from the speakers. Unplugging the router of course solves the problem. At first I thought there was a fan inside the router causing the pulsation but there is no fan; and this sound is similar to what you might hear from some sort of fan interference.
It is the router shaking hands with the remote server.
It used to happen when my cell phone was started in the morning, I used to switch it off at night.
Grin and bear it, or put it in a Faraday Cage...basically a wire mesh frame connected to mains ground.
That might cause a problem with its Wi-Fi, so bear that in mind.
They run hot, so do not use a closed box.
It used to happen when my cell phone was started in the morning, I used to switch it off at night.
Grin and bear it, or put it in a Faraday Cage...basically a wire mesh frame connected to mains ground.
That might cause a problem with its Wi-Fi, so bear that in mind.
They run hot, so do not use a closed box.
Speaker must be going 'peen peen poon poon tak tak tak....takakatak.'
Normal.
Keep amp muted, or the router always on, which can be risky.
I checked the source cable to amp, broken shield sometimes does that also, worth checking.
Normal.
Keep amp muted, or the router always on, which can be risky.
I checked the source cable to amp, broken shield sometimes does that also, worth checking.
D
Deleted member 316927
Thanks for the replies. Coincidentally, I was just thinking about the faraday cage concept, because when I put my hand over the top vent, seen in the attached photo, the pulse noticeably diminishes though not completely.
If I recall accurately, the CTC Blowtorch was based on the faraday concept and it had no vents, but then again it had an outboard power supply and I think the aluminum billet -- both main chassis and outboard supply -- was engineered for ample heat dissipation.
In any event I hardly have that kind of R&D funding so I'll just live with it and hope no harm to the Sound Labs. Will also check interconnect shields. Thanks again.
If I recall accurately, the CTC Blowtorch was based on the faraday concept and it had no vents, but then again it had an outboard power supply and I think the aluminum billet -- both main chassis and outboard supply -- was engineered for ample heat dissipation.
In any event I hardly have that kind of R&D funding so I'll just live with it and hope no harm to the Sound Labs. Will also check interconnect shields. Thanks again.
Attachments
Try using a ferrite CM clamp like these: https://eu.mouser.com/c/passive-com...-suppression/ferrites/ferrite-clamp-on-cores/ , first on the router side, then on the wall side, and eventually on both.
It is a stab in the dark, but at least it is cheap and easy, and can be carried out very quickly.
If it doesn't work, you'll have to try something else, but you won't have lost a lot of time or money
