Hi All,
Just to be clear, the request was about which multi-band antenna to buy.
I'd like to play with the new F9P or F9T GPS modules. The Chinese unit
from ebay is now in hand, and I need a free weekend to build a mount for
the house.
For those concerned with the lightning aspect, The hits were not direct.
The long wire on the GPS antenna is the suspected culprit. Even with
surge protection on the coax, the antenna died. The antenna was mounted
on a tower next to a remote garage, with coax to the house.
The new GPS antenna is going to move from the tower to the house (~200ft
shorter coax). The tower itself (at the remote garage) has four ground
rods bonded to it, and it's also tied to the 6" steel well casing (220ft
deep). The garage has two ground rods at it's service entrance. There
are two ground rods at the house (sub panel fed from the garage). The
house rods should be very low impedance, installed in very wet ground,
driven below the basement footings when those were exposed.
Anyway, I think this will solve the lightning issue. And hopefully give
multi band capability too.
Thanks for all the input!
Dan
On 10/16/2019 12:00 PM, [email protected] wrote:
If your other gear survived, likely, the lightening hit was an indirect one.?
If you do install more rods near antennas, it is extremely important that those
rods are connected/bonded to the house main feed grounds at service entrance
via low impedance/resistance connection.? How exactly this needs to be done is
a very deep science people make living out of.? Without this
antenna-ground-to-main-ground-connection, there will be enough potential
difference that your stuff will blow again.
In State of Florida where I live, and the lightening capital of the United
States, the code says, stick two rods in the ground and call it done.? This is
not even close to enough for lightening protection.? It's barely enough for
personal protection.? I have five rods at the moment.? I plan to add many more
as time and resource permits.? I'd like to have ten rods at least.
Good luck and let's all be safe!
---------------------------------------
------------------------------
After two hits, I'd consider a lightning rod or two near the antenna,
with the air terminal well above the antenna, but not connected to that
antenna.
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