Ethernet Interference how to filter

Trevor-EI2GLB

Hi All I seen a post somewhere recently explaining that it was a waste of time putting ferrite on either utp or stp Ethernet cables, I can't remember which, or where I read it, I am trying to remove some birdies on 2m caused by home network, Anyone have any pointers, I have a large amount of cat cable around my house so don't want to replace it with the wrong type, Thanks Trevor EI2GLB

Neal_K3NC

Ron / K4XRF

Mike-VA3MW

I had the same thing happen with the Cisco router I replaced the router. It solved the problem perfectly. 

Ethernet cable is generally pretty good as it is twisted pairs that do a good job of not radiated signals.  

Are you sure your cables are properly made with the connectors on correctly?  The twist is key and part of the design.

In all seriousness, not all Switches/Routers are created equal.  In my Cisco case, the 64 port device as actually wiping out 2M.  You could hear it in a 2M handheld in AM mode. (VX7R).  

I did replace it with a $50 device from TP-Link and the effect was amazing.  I suspect the switching power supply in the Cisco that had gone noisy as it was pretty old.

Switching power supplies are a dime a dozen today and there is no thought given to RF immissions anymore.  

Good luck and let us know how you make out.

Mike 

Michael N3LI

N2WQ

20 turns thru material #43 will cure your problem.

Lawrence Gray

I replaced all Ethernet cables with CAT 7, which solved my Ethernet noise issue.  As mentioned above, cheap switchers also cause issues.  I have a Cisco IP phone which had a noisy wall wart.  I also, as mentioned above, put ferrites on every cable.  Easier than trying to find noise sources, as pointed out above.