Matt,
It's much more likely to be the power supply module for the network device
than to be the network switch itself. Also, laser printers are very noisy.
Mine is so bad that I have to leave it powered off unless I'm printing
something.

Try turning off the printer and try swapping out the power brick for the
switch. One of those 5VDC units here was really killing most HF bands,
especially 80 through 20. I used one from another device and it fixed it.
Finally I bought a bunch of 12 to 5 volt DC to DC converters on EBay and I'm
gradually eliminating all the power bricks and running the network gear off
the shack 12 Volt supply.

73, Jim


-----Original Message-----
From: For blind ham radio operators [mailto:[log in to unmask]]
On Behalf Of Matthew Chao
Sent: Saturday, July 25, 2015 11:29 AM
To: [log in to unmask]
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.