L. M. Rappaport wrote:

On Wed, 9 Mar 2005 20:14:22 -0500, "James"
3. Entering the house you should use a gas plug arrestor (Polyphaser
is one brand). This will set you back around $45 but they react in
microseconds and are just about the only effective lightning
arrestor.
W_tom knows more about this than I do, but these are uniformly used
in
all commercial installations for both cable tv, wireless internet,
cellular telephone, etc. Naturally, the arrestors need to be
connected to the ground system.

If you can't do this, just make certain you ground the antenna with
the heaviest wire you can find.

To expound on your last statement: "Heaviest wire" should not be solid
wire. Because of the surface effect of electricity traveling through a
wire, stranded or braided wire provides much more surface area,i.e.
path of least resistance. Thompsons is a leading manufacturer of
lightning protection equipment and they almost exclusively use braided
wire for down conductors.
Bob S.