Interferance from my computer network.

Noise and interference issues?
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Sniffingmoose
Posts: 179
Joined: 11 Oct 2014 19:12
Location: Burton on Trent

Interferance from my computer network.

Post by Sniffingmoose » 26 Oct 2014 18:43

Hello All
Hello

Just improved my reception greatly. I simply switched off my Linksys PSUS4 4 port switch which I have as part of my network.

The device webpage is http://support.linksys.com/en-eu/suppor ... vers/PSUS4" onclick="window.open(this.href);return false;

I have noticed that this device increases the noise floor and obliterates the weaker signals. I do run the antenna coax next to the network cables, I will experiment with separating them and switch the device back on. I thought that the coax would be well enough screened to be affected by interference from nearby cables but obviously its not. Is all learning.

Chris Thomas
Burton on Trent
Chris T
Burton on Trent
On a hill facing south west. Height 340 feet ASL
52.7992°N 1.612°W

Antference 4 Element Horizontal Beaming West high up up on the Chimney
Maplin DAB 4 element Beaming South West
Folded Dipole Vertical in the loft.

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mediterraneandxer
Posts: 91
Joined: 06 Oct 2014 18:05
Location: Czech Republic

Re: Interferance from my computer network.

Post by mediterraneandxer » 26 Oct 2014 19:45

I'm doomed :-(
ICOM R75, R8500 | Lowe HF~225
Wellbrook ALA1530 | LF Engineering VLF, MW, Skymatch

Günter Lorenz
Site Admin
Posts: 51
Joined: 02 Oct 2014 10:24

Re: Interferance from my computer network.

Post by Günter Lorenz » 26 Oct 2014 20:45

Hi Chris,

there may be three sources for the QRM: The power supply of the switch, the ethernet cables, or the switch itself.
Try using Cat 7 cables. Depending on the voltage, you might try running the switch from a battery pack to exclude the PSU. And try putting the switch into a tin box...

73,
Günter

Sniffingmoose
Posts: 179
Joined: 11 Oct 2014 19:12
Location: Burton on Trent

Re: Interferance from my computer network.

Post by Sniffingmoose » 26 Oct 2014 20:59

Hi Gunter

Thanks for your reply. Interesting. I have not heard of Category 7 cables.

But yes I cold try putting in a biscuit tin!

Chris
Chris T
Burton on Trent
On a hill facing south west. Height 340 feet ASL
52.7992°N 1.612°W

Antference 4 Element Horizontal Beaming West high up up on the Chimney
Maplin DAB 4 element Beaming South West
Folded Dipole Vertical in the loft.

Günter Lorenz
Site Admin
Posts: 51
Joined: 02 Oct 2014 10:24

Re: Interferance from my computer network.

Post by Günter Lorenz » 26 Oct 2014 21:14

The usual cabling is Cat5. Cat 7 is extra shielded, and thus a bit more costly.
Yes, a biscuit tin is a "double pleasure" solution ;-)
Let us know the results!

73,
Günter

Andrew Webster,Wigan
Posts: 1905
Joined: 18 Sep 2014 16:03
Location: Wigan Northwest England
Contact:

Re: Interferance from my computer network.

Post by Andrew Webster,Wigan » 26 Oct 2014 22:51

I have Cat 5 cables running alongside my coaxes and no problems with that.

If you do the biscuit tin try it and if it works put some holes in the top and bottom for ventilation.

Andy.
Receiving equipment: 2 Sony ST-S311, 1 Sony ST-SE520, 1 Sony ST-SE700 2 crossed FM 5s rotatable, 1 homemade FM 3 horizontal beaming S/E, 1 vertical FM 3 fixed beaming at Ireland, 2 element band 1.

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