is the modem now closer to your antenna/antennas?
close in any way, above, beside, below or anything?
are you running cables from the modem or router near to your antenna coax
lines?
does the modem have ferrite rings on the power input cable, and the cat 5
that goes from the modem to the first router or computer?
If not, then you should contact your ISP and have them give you shielded
cabling...it has become industry standard to shield both the power leads and
the patch cable from a high speed modem.
past that, you can try shielding the modem itself by wrapping it in a
conductive material...such as tin foil or copper foil...allowing holes of
course for air flow.
there should be no active RFI from the modem or router, if there is, then
you might ask to have your modem replaced with a new one if you are renting,
or replaced even if you have perchassed it...they guarantee no interpherence
on wireless devices which includes amateur radio equipment...so if there is
interpherence, it could be a device defect.
73
Colin, V A6BKX
----- Original Message ----- 
From: "Jeff Kenyon" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Friday, July 28, 2006 11:57 AM
Subject: have moved a cable modem, but have noticed new problems with
interference


> Hi everyone, I have recently moved, my cable modem to the attic at home.
> I am thrilled with the improved coverage for they Internet from my room.
> However, I have noticed that RF interference has picked up with the
> 2-meter band in particular.  I still can operate and VHF/UHF DX, but the
> interference on 2-meters has picked up.
>