Elliptical waveguide will lose 3 dB in 250 feet.

----- Original Message ----- 
From: "Mike Brownson" <[EMAIL PROTECTED]>
To: "WISPA General List" <wireless@wispa.org>
Sent: Tuesday, August 19, 2008 10:33 PM
Subject: Re: [WISPA] coax cables


> To give you the facts.  You can use just about any coax you want.  But you
> will have loss.  The smaller the cable the higher the loss.
>
> Examples:
> RG8     lose 3 db in 17 ft
> LMR400  lose 3db in 26 ft
> LMR600   lose 3 db in 40 ft
> 1/2 heliax   lose 3 db in 49 ft
> LMR900  lose 3 db in 60 ft
> 5/8 heliax   lose 3 db in 64 ft
>
>
> Remember that for every 6dB in loss you lose half your transmit and 
> receive
> range.  So with 34 ft of RG 8 instead of 5 miles you get 2.5.  So use
> whatever cable you can get away with and still have the performance you
> need.  If you need every miliwatt to be useful then use coax only as a 
> short
> jumper.
>
> Mike B
>
>
> On 8/19/08 9:45 PM, "Matt Jenkins" <[EMAIL PROTECTED]> wrote:
>
>> LMR 400? Are you crazy? Heliax 1/2 is the only way to go!
>>
>> [EMAIL PROTECTED] wrote:
>>> It can but the loss is high and the braid is much less. Stick with LMRs
>>> 400 *,5 '22@ )+_3 "2,/(:4 32*" 4:+3(
>>> Sent from my Verizon Wireless BlackBerry
>>>
>>> -----Original Message-----
>>> From: RickG <[EMAIL PROTECTED]>
>>>
>>> Date: Tue, 12 Aug 2008 10:33:57
>>> To: WISPA General List<wireless@wispa.org>
>>> Subject: [WISPA] coax cables
>>>
>>>
>>> I'm running coax down my tower and came across and RG8/U. Can this be
>>> used on 5GHz?
>>> -RickG
>>>
>>>
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>
> -- 
> Mike Brownson
> Hutton Communications
> 5015 Paris St
> Denver, CO 80239
> 303-373-3170
>
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