I've always been told that they should be placed at the building entrance.
marlon
----- Original Message -----
From: "Marinus Willemstijn" <willemma@telkomsa.net>
To: <towertalk@contesting.com>
Sent: Saturday, February 28, 2009 7:51 AM
Subject: Re: [TowerTalk] Lightning Arrestors
> 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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