Most likely it's the wallwart plug plugging it in to the wall if it has one, 
I've seen those do that on a lot of ham equipment. The first run of 
verizon's fios gateways you needed to change the plug because of that 
problem on the HF bands. The newer ones aren't so bad but I know I had to 
change the plug on that, and many other things. Even my first wifi access 
point back when wifi was brand new, I had that problem and ended up 
replacing that wall wart, that one wasn't HF, I think it was either VHF or 
UHF it interfered with.
----- Original Message ----- 
From: "Matthew Chao" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Saturday, July 25, 2015 11:29 AM
Subject: Noisy Network Switch


> Hi, Folks.  It's not the radio that's creating RF, but the network
> switch.  Seems that since I installed a network switch to enable my
> YL to access my printer, I've had some RFI on my 2-meter rig in the
> shack.  After turning off different possible sources, I traced the
> noise to the network switch.  Now, what's the best way to reduce the
> noise?  Pretty amazing how, for once, it's not our radios that are
> the culprits, but a piece of consumer electronics, hi, hi.  Thanks
> for any advice you might have.--Matt, N1IBB.