Thank you very much to everyone who responded. Too many mails to consume in
a short period of time and I will follow up on all the links that were
suggested. Your help as always is very much appreciated. I was told by a
local ham that the arrestors should be within 1 or 2 meters from my
equipment in the shack which in my case is not possible. The option to
install then at the base of the tower to me is more practical as from there
onwards my coaxial lines run through the roof of my house.
Thanks again and warm regards!
73's
Marinus Willemstijn
ZS6MAW
-----Original Message-----
From: towertalk-bounces@contesting.com
[mailto:towertalk-bounces@contesting.com] On Behalf Of Marinus Willemstijn
Sent: 28 Februarie 2009 16:58
To: 'jimlux'; towertalk@contesting.com
Subject: Re: [TowerTalk] Lightning Arrestors
Basically protect my radios to such an extent that I do not have to unplug
for every stray bit of lightning. I have insurance but un plugging becomes a
drag for me in our rainy season (Summer). Basically first line of defense
for the radios.
Marinus
ZS6MAW
-----Original Message-----
From: jimlux [mailto:jimlux@earthlink.net]
Sent: 28 Februarie 2009 16:43
To: willemma@telkomsa.net
Cc: towertalk@contesting.com
Subject: Re: [TowerTalk] Lightning Arrestors
Marinus Willemstijn wrote:
> Maybe this is general knowledge but could someone please direct me to some
> information on lightning arrestors for my coaxial lines running to the
> tower. I need some information like:
>
>
>
> 1) Is there a specific distance they should be installed form the
shack
> or tower?
>
> 2) Which are the most effective and best value for money?
>
>
>
> Thank you in advance for your response and my apologies if this is off
> topic.
>
a) Are you trying to meet a regulatory requirement (electrical code
requires specific types of antenna discharge units)
b) what are you protecting? The house from burning down? The radios from
getting damaged? The coax from being damaged?
c) Are you protecting against a direct strike, or against induced
currents/potentials from a nearby strike.
d) do you have any "availability" or "mean time to repair" requirements?
(For instance, if you can be off the air, and you don't have a lot of
lightning, maybe spending the money on an insurance policy that will
replace the gear is a better strategy. If you're a mission critical
comm facility used for air traffic control during thunderstorms, then a
different approach is probably needed.)
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