I had the same issue with my old internet gate way wireless router device.
It was a dsl connection, but there was a long run of rg59 from the router to 
a tv box upstairs...the RFI came from the cable run because it disappeared 
when I disconnected the rg59 from the router...or, it didn't disappear 
completely, but was drastically reduced...no ferrite filters helped at all 
in this case.  after I switched over to a cable type modem I have 
experienced very little rfi from that device.  it's still there on certain 
frequencies, but nothing near what the old system had.
So, my impressions are that some devices cause the rfi more than 
others...could be a wall wart, could be a leaky cable, could be the wireless 
portion of the router etc...with the old device I did shut off the wireless 
part of the router and the rfi did not go away...
the new box is some sysco thing and seems very clean.
I get so much intermod in my neighborhood from a couple taxi data sites 
within 2 blocks that on vhf and uhf, I hardly notice any additional rfi from 
devices in the house.

73
Colin, V A6BKX
--------------------------------------------------
From: "Howard Kaufman" <[log in to unmask]>
Sent: Tuesday, May 06, 2014 6:33 AM
To: <[log in to unmask]>
Subject: rfi

> I have discovered that my router is radiating signals all over UHF and 
> VHF.
> Have any of you experienced this, and how have you solved it?
> Toroids on the cables?  If so and how much inductence.
> Shielded cat-5?
> Rerunning cable, yuck!!!
> Its a sisco router.
>
> H T Kaufman MSW LCSW
> Adaptive Technology Instructor
>
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