[RFI] RF getting into 4-port wirelss router.

Jeff jrnet at centurylink.net
Mon Jan 12 13:40:30 EST 2015


I changed TV & Internet providers from a coax feed line to cat5 feed line
from the point of entry at the house to the modem inside.

My tower that I load for 160m is 20 feet from the entrance point. Every time
I transmitted, 1kw on 160m, my tv would go down along with the internet.
It would reset a minute later.  I never had a problem when the feed was coax.

I read K9YC's 'Understanding and Eliminating RF Interference' guide and added a
15 turn Ferrite choke right at the point of entry into the modem. I have multiple
cat5 cables going to other computers from there.  It completely solved the problem
and the tv has no interference & internet is always on. Thanks Jim.

Jeff Reynolds  NE0DX

Kenneth G. Gordon wrote:
> OK, gang, I need some different help here.
>
> I have a 4 port wireless router (Trendnet TEW-812DRU at the moment)
> connected to our main computer and two others in the home, not including
> the laptops that connect to it periodically.
>
> I have replaced the router at least 4 times over the past year or two due to
> the fact that RF from my ham station is getting into it through one or more of
> the three CAT-5 cables I have connected to it.
>
> I have installed several of those snap-on filters on all three of the CAT-5
> cables which connect to it, and also on both ends of the DC power cable,
> making seveal "loops" through each filter.
>
> I still wipe out the router every time I get on the air. I have destroyed one
> $169.00 router, and two less expensive ones, a TPNET and a Cisco.
>
> The only solution I have come up with is to disconnect the CAT-5 cables (all
> three of them) from the router each time I get on the air.
>
> Has anyone here had a similar problem, and if so, what did you do to fix it?
>
> BTW, one of my CAT-5 cables runs to the ham shack, where it connects to a
> dumb 4 port switch...
>
> This has become a giant PITA.
>
> Any ideas?
>
> Kenneth G. Gordon W7EKB
>
> "Courage is being scared to death but saddling up anyway."--- John   Wayne
>
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