you already have a ground between the tuner and the radio via the coax 
shield...
You already have full chassis ground through the ground prong on the  AC 
power.
However, to avoid RF hot spots on the chassis of your equipment, it is 
advisable to use another earth ground of some kind for your 
equipment...either via a ground rod, or to the main electrical ground of the 
house such as the city side of the water meter on the cold water pipe, or 
connected to the ground rod used by the electrical of the house if there is 
one.
Also, having a separate ground rod just for the station is good because that 
can also be used for both RF and electrical ground and will help in the case 
of a nearby lightening strike etc.
You need to use a ground bus, and have a wire from each piece of equipment 
connected to that common bus...do not daisy chain the grounds together.  In 
other words, your grounding has to be paralel, not series.
If it's electrical ground, the wire length doesn't matter at all...but if 
you are going after an RF ground, the length of the ground wire may, if you 
are using a non-resonant antenna, or latter line or long wire and a tuner, 
effect the tuning of the antenna.

Often an additional ground for the station equipment is not necesary as the 
AC ground takes care of it, but sometimes you may need it if you find you 
are having issues with RFI in your audio, or excessive noise on receive or 
if you are causing RFI to other electronics in the house or with your 
neighbors.

73
Colin, V A6BKX
--------------------------------------------------
From: "Mike Ryan" <[log in to unmask]>
Sent: Tuesday, November 26, 2013 1:10 PM
To: <[log in to unmask]>
Subject: Re-station ground

> So if I have a ground wire running from my ATU's ground stud to the back 
> of
> the rig's ground stud, considering my rig has a built in power supply and 
> a
> 3 prong plug, this will be fine?
>
> Mike