Protection is defined by the figure in

http://www.erico.com/erico_public/pd...es/Tncr002.pdf

Antenna has its own earth ground. Antenna earth ground
connects to the building earth ground. Antenna wire must
enter at the service entrance and first make a connection
direct (and less than 10 feet) to the single point ground also
used by AC electric, telephone 'whole house' protector, and
cable.

Also notice even buried cables can carry a destructive
transient inside the building if not earthed at the service
entrance. Earthing is accomplished by direct wire connection
(ie ground block sold even in Radio Shack and Home Depot) for
coax cables AND through a surge protector for wires that
cannot be earthed directly (ie AC electric and phone).

wrote:
I am so confused about how to properly ground a system. I will have a
two meter and a 440 on the roof of my house. I will run the coax down
to my sofit vents or whatever they are called and run the coax inside
the vents to my shack. Behind the wall where my rquipment will be is a
storage space that I can acess. (This is a finished attic). I will be
using a mobile radio that has two antenna outputs, one for 2 meter and
one for 440.

How do I ground the radio and does it need it? Should the coax itself
be grounded and how? Do I have to purchase one of those surge things
that screws into the coax?

Any advice is appreciated!