It runs IF and DC up an LMR600 run between the transmitter in the shack
and the amplifier up top. The amp takes N-Type from the IF and has
Waveguide out to the antenna(s). The 6 and 11Ghz stuff is all Ceragon
brand, the 5Ghz is in the unlicensed band and has very short cable runs
of a couple feet. The transmitters are fed by Ethernet cables with Power
over Ethernet on the cable.
On 7/21/12 1:07 AM, Jim W7RY wrote:
> Gas tubes for 5, 6 and 11 GHz? I bet the microwave down-coverts at
> the back of the dish and your running 1/2 LDF down the tower. I've
> never seen a lightning surge suppressor on a piece of waveguide at any
> frequency.
>
> 73
> Jim W7RY
>
>
> -----Original Message----- From: Adam Kennedy
> Sent: Friday, July 20, 2012 9:38 PM
> To: towertalk@contesting.com
> Subject: Re: [TowerTalk] Lightning Protection via gas tube devices
>
> We put gas tube lightning protectors at the bottom of every cable run
> for our microwave (5, 6 and 11Ghz bands) links. At the half-way point
> and at the top we install grounding kits to ground the shield of the
> cable to a good ground. The Motorola R56 standards have some good tips
> and standards to use for grounding of towers and feed lines. Feed line
> ground kits aren't always cheap, but the first time they protect your
> equipment from a lightning strike, they have already paid for themselves!
>
> On 7/17/12 2:46 PM, Larry Loen wrote:
>> On the subject of lightning protection, is this sort of thing:
>> http://www.l-com.com/item.aspx?id=21474 useful or advisable?
>>
>> Do I put one just at the base of the tower (and connect it to the
>> tower ground system) or do I also have one next to the shack.
>>
>> I was looking into female-female SO239 type devices for use as the
>> shack side ground for my coax (I'd have a connector box and then make
>> sure the paired "SO239"s would then be grounded), but I wondered about
>> this.
>>
>> The price isn't great, but what worries me more is the 0.4 dB
>> insertion loss. Or, is that at GHz frequencies only?
>>
>>
>>
>> Larry Wo0Z
>> _______________________________________________
>>
>>
>>
>> _______________________________________________
>> TowerTalk mailing list
>> TowerTalk@contesting.com
>> http://lists.contesting.com/mailman/listinfo/towertalk
>>
>
>
--
Adam "Fuzzy" Kennedy
W0FZY
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