Tower is 150 feet, Rohn 45 equivalent, guyed with Phillystran. Three ground
rods at base, each tied to two legs with one inch copper braid. Bulkhead is
at window loaded with Polyphasers for all coax and rotor/control cables.
Bulkhead is connected at each end to separate ground rods just below. All
five ground rods are connected together and also to the power service ground
rod using 4 gauge copper wire. All of these connections are via buried
wire. All coax and rotor/control cables run from tower to bulkhead via 2
inch buried electrical conduit.
Keith
-----Original Message-----
From: towertalk-bounces@contesting.com
[mailto:towertalk-bounces@contesting.com] On Behalf Of kb9cry@comcast.net
Sent: Friday, July 23, 2004 11:34 AM
To: keith@dutson.net; TowerTalk
Cc: Keith Dutson
Subject: Re: [TowerTalk] Lightning Strike
First question would be to please describe your grounding system. Coax,
computer, electric service, phone, etc. Phil KB9CRY
-------------- Original message --------------
> Yesterday the XYL called my office to say lightning had struck the
> tower (again!). She did not see the strike but guessed it hit the
> tower. Upon arrival at home I found many problems:
>
> 1. Computer LAN cable apparently carried sufficient voltage to destroy
> all connected equipment (NIC's, routers, switches, satellite modem).
> One PC will not boot.
>
> 2. One PC monitor now displays purple around the edges and green in
> the center. The satellite modem was positioned adjacent to the monitor
> (actually touching the cabinet) and I am guessing it caused EMP when
> it blew from the LAN connection.
>
> 3. Alpha 87A will not turn on. Checked and found no voltage at power
> outlet. Found breaker in service panel tripped. Reset breaker, have
> 230VAC at outlet, still will not turn on. Need to check amp fuse.
>
> 4. Phone inoperative. Called for service. They detect problem on line
> outside house.
>
> 5. Satellite TV to shack inoperative. Tried receiver reset, no luck.
> Satellite works fine in main house.
>
> This is sort of a mystery to me. But here is my analysis:
>
> The shack is a 1000 sq ft "apartment" about 50 feet from the main
> house. It has den, kitchen, bedroom, bath, laundry, etc. It has its
> own power service and meter. There is a conduit running between the
> house and shack that carries prone line, LAN cable and TV cable. It
> enters the shack through the same area used for AC power meter and
> breaker box. I am guessing that these cables picked up a rather large EMP
from the strike.
>
> I would like opinions from the list. Thanks.
>
> Keith
>
> _______________________________________________
>
> See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless
> Weather Stations", and lot's more. Call Toll Free, 1-800-333-9041 with
> any questions and ask for Sherman, W2FLA.
>
> _______________________________________________
> TowerTalk mailing list
> TowerTalk@contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk
_______________________________________________
See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless
Weather Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any
questions and ask for Sherman, W2FLA.
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
_______________________________________________
See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless Weather
Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any questions
and ask for Sherman, W2FLA.
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
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