[SixClub] Those that care

[Mike Pappas]

Here are a set of papers on what broadcasters do for lightening  
protection for AM/FM transmitter sites by Nautel.  We build all of our  
AM and FM sites to these standards and we haven't blown up any gear  
since we started buying Nautel transmitters more than a decade ago.    
We have an AM on 1390 into a 199 foot tower and 3 FM that are on  
mountain tops in Colorado which is know to have lightening issues.

You will notice the extensive use of ferrite cores on mains wiring,  
antenna feed lines and control cables.  Ferrite cores present  
significantly higher levels of inductance to common mode voltage  
transients than does looping the wire a couple of times.   You will  
also note the use of a single point grounding system for all cables  
entering the building.  The use of ferrite cores and single point  
grounding technique has been used for more than 40 years with  
outstanding results.

http://www.nautel.com/Resources/Docs/Whitepapers/lightningprotection.pdf

http://www.nautel.com/Resources/Docs/Site%20Recommendation%20Book%20-%20Issue%203%20%282004%29.pdf


Best regards and '73

Mike Pappas
W9CN
advanceddigital at mac.com



On May 17, 2009, at 11:29 AM, Richard J. Fiero II W5TFW wrote:

> INTRESTING !
>
> George Clark wrote:
>> Basically, anything that plugs into an Electrical outlet, you tie  
>> into a loose knot. The theory is if you get a lighting hit close to  
>> you and it comes into you wiring, it will hit the knot, burning  
>> your card but not the what ever that is attached to it. I have all  
>> my electrical Eqpt. in that manner. I've had neighbors have lost  
>> some of their appliances and other devices but all I had to do was  
>> replace my electrical plug in wiring. Now don't get me wrong,like  
>> you and others, I unplug my radios and other equipment that I can!
>> --- On Sun, 5/17/09, dogsnradios <dogsnradios at att.net> wrote:
>>
>>
>> From: dogsnradios <dogsnradios at att.net>
>> Subject: Re: [SixClub] Those that care
>> To: "World Wide Six Meter Club" <sixclub at mailman.qth.net>
>> Date: Sunday, May 17, 2009, 10:39 AM
>>
>>
>> Interesting concept George. I admit I can not picture this in my mind
>> though. Can you post some more information,diagrahms or links for  
>> this?
>> Thanks
>> Larry
>>
>> ----- Original Message -----
>> From: "George Clark" <ko4qr at yahoo.com>
>> To: <undisclosed recipients:>
>> Sent: Saturday, May 16, 2009 6:14 PM
>> Subject: [SixClub] Those that care
>>
>>
>> For those that not not know, ( I think those that are Hams do) If  
>> you get a
>> lighting to hit your electric pole,can burn your equipment out. If  
>> you put a
>> over and under through type hook up, it'll burn to the wiring but  
>> not the
>> Equipment out(Choke) and all you'll have to do is replace your  
>> electrical
>> hook up to your equipment. It can be loose not tight.
>> GW ko4qr
>>
>>
>>
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