HF antenna is outside, about 35 feet away and 35feet up between two 
trees; also grounded outside with 8-foot ground rod and lightning 
arrestor.--Matt, N1IBB.

At 12:26 PM 12/8/2015, you wrote:
>Matt,
>
>You didn't mention where your vhf/uhf antenna is. If it's in the shack, that
>could be an issue as that hum when you transmit is almost certainly RF and
>if you can separate the gear from the antenna, that may help. Of course, you
>probably know all that. I'm just trying to leave no stone unturned. Lou
>WA3MIX
>Lou Kolb
>Voice-over Artist:
>Radio/TV Ads, Video narrations
>Messages On-hold:
>www.loukolb.com
>----- Original Message -----
>From: "John Miller" <[log in to unmask]>
>To: <[log in to unmask]>
>Sent: Tuesday, December 08, 2015 12:15 PM
>Subject: Re: Hum Everywhere in my Shack
>
>
> > Is replacing the wall wart an option? I don't see why not, that's how I'd
> > handle that. ON the hum with the speakers, I've found some do that, and
> > some
> > don't and don't know how to fix that. If you have a station ground on the
> > HF
> > radio, try removing it and see if the problem goes away on 10 meters, if
> > you
> > don't have one and can add one, try that. You can move the wires around on
> > the PC speakers. I know with the ones I use now if the wires for the
> > speakers run right along side the coax I can get that same thing but I
> > move
> > the cables apart and it goes completely away. You could try chokes or
> > boiling the extra speaker wire. You may end up with new computer speakers,
> > those are suggestions I can think of right now. I'm also in a very limited
> > space and managed to fix that problem pretty easy and on 2 meters, I have
> > 100 watts available with no hum anymore just by separating the wiring. I
> > pretty much have it set up so my coaxes are all together on one side of
> > everything and everything else is on the other side with minimal over lap.
> > It works out very well that way. It's a mess, but works.
> >
> > -----Original Message-----
> > From: Matthew Chao
> > Sent: Tuesday, December 08, 2015 11:11 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.