Hi, Folks.  I seem to be having a grounding problem in my shack.

First, I've got a noisy wall wart that powers my network switch.  It 
effectively blanks out some of my 2-meter repeater freqs on my TMV710A.

Second, on the other end, when I transmit on VHF/UHF, I get a hum 
through my PC's audio.  The same thing sometimes happens on HF as 
well, particularly on 10 meters.  Sometimes, I can hear my distorted 
self coming through on my PC's desktop spekers.

Due to limited space, my PC and ham gear need to coexist on a 6-by 
4-foot desk.  And neither wants to always play nice.  Any suggestions 
that don't involve a lot of moving and shoving would be 
helpful.  Thanks in advance.--Matt, N1IBB.