[TowerTalk] Lightning - was Advice
Rick Stealey
rstealey at hotmail.com
Tue Sep 11 11:02:26 EDT 2007
Hi Ed,
You said:
>I can't do a "whole house ground" the way my place is laid out. There
>are three grounds at the tower, three under my window and four near
>the main entry panel.
Are your various grounds tied together? If not, there can still be
instantaneous voltage differences between the grounds that can be huge. The
telephone line had high voltage on it resulting from the induced current
from the strike. It should be grounded at the entrance to the home and that
ground should be common with all other grounds (such as the station ground
and the tower ground).
I had a direct hit in my front yard 10 years ago, at 3 am. Hit an 80 foot
oak tree and eventually killed it. It brought me right up out of my bed
about 3 feet. I thought someone had just fired a 12 gauge shotgun right
outside my window, honest ! I've been constantly building and improving my
ground ever since. Currently have about 20 rods - at the tower, along
radials from the tower, at the house entrance, outside shack wall (single
point ground for equipment) and all grounds tied together and to the service
entrance ground. I have 8 Polyphasors on coax, telephone, rotor control,
and tv cable and I need more for the SteppIR controller.
If you will read W8JI's website (w8ji.com) you will get a lot of info. He
believes in solid grounds but that lightning arrestors are unnecessary.
Interesting reading.
Rick K2XT
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