On 7/4/2013 4:09 PM, les wrote:
Is it better to place lightning protecting at the base of the tower or
where it enters the house. All cables will be in a buried conduit.
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It all depends, but it is required at the entrance by code. If the
tower is mote than a few feet from the house, then I'd also do it there.
I ground all coax braids at the top and bottom of the 100' tower with
the use of bulkhead connectors. You can reduce the loss "slightly by
using a grounding kit at each point instead of bulkhead connectors, but
at the frequencies most of us run, I think it's a waste of time and no
small effort. OTOH on microwave frequencies, every little bit helps and
there the loss of connectors is far more than at HF. From the
In my installation the coax goes to the grounds at the base, then back
up about 3 feet to a large NEMA box. They enter the junction box through
bulkhead connectors as well. there is a 6-pack inside.
from there they go underground in conduits to the house and shop where
there are grounding panels and polyphasers. In the shop I have a patch
panel that aids in disconnecting the rigs.
Remember the loss figures for connectors is at their upper frequency
limit so when used at HF the loss is miniscule.
73
Roger (K8RI)
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