Matt,

In no particular order:  Try grounding the case of the computer to the 
shack ground.   Try plugging the wall warts for any affected gear 
(speakers, network switch) into a outlet on a different circuit than the 
radio's power supply.   Invest in ferrites and clamp  things like pc 
speaker cables, wall wart cables, etc.  Of course be sure your coax 
connections are good and tight.

Did this just start?   If so, have you made any recent changes to the 
station or pc?


I'm sure you will get other suggestions, and probably better ones.  good 
luck. Steve  KW3A

On 12/8/2015 11:11 AM, Matthew Chao wrote:
> 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.
>