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Jim Yanik

wrote in :

On 20 Nov 2007 22:54:22 GMT, Jim Yanik wrote:

wrote in
m:

On Tue, 20 Nov 2007 05:57:06 -0800 (PST),
wrote:

On Nov 20, 12:10 am, "Mamba" wrote:
wrote in message

...

Just mount the yagi on a metal mast and run a clamped on wire
from the bottom of the mast down to a rod driven into the
ground. If you want to use a wooden mast then just clamp a wire
to the boom or the mount of the antenna and run the wire
perpendicular to the boom and away from the antenna down the
wooden mast. The ground driven rod is ideally eight foot long
but it is unlikely you'll be able to use the full length. If
possible drive the ground rod close to grounded plumbing like
your outside water spigot. Attach a short jumper to the plumbing
also.

This is the ticket. I'll do it this way. Best compromise between
safety and signal quality.

Not according to the NEC, which requires an arrestor on the cable
and doesn't have a compromise. What you are proposing grounds the
antenna mast, but leaves the antenna itself with no protection.

Wrong. A Yagi by design is DC grounded. Boom and elements.

but is what the Yagi *mounted on* grounded? (not the cable shield,a
REAL ground.)
if you bolt an antenna tripod or chimney mount on your roof,they will
need a proper ground wire.

just depending on a cable "ground" will channel lightning into your
receiver and home.

Didn't what I said aboveground the mast or boom?

Not necessarily.
Uninformed homeowners might not know to ground the mast/boom/antenna
mount,or figure they can get by without it.

--
Jim Yanik
jyanik
at
kua.net