First, try toroids on the speaker leads.  Probably need a higher quality
supply for the remote switch.


-----Original Message-----
From: For blind ham radio operators [mailto:[log in to unmask]]
On Behalf Of Matthew Chao
Sent: Tuesday, December 08, 2015 10:11 AM
To: [log in to unmask]
Subject: Hum Everywhere in my Shack

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.