[TowerTalk] Coax Run To Tower

[donovanf at starpower.net]

Dan,

Here are the attenuation specifications for some common cables at 28 MHz:

Cable      dB per 100 ft       dB per 500 ft
          
LDF7-50A       .12                 .6
LDF5-50A       .19                 .95
3/4" CATV      .26                1.3
LDF4-50A       .35                1.75 
9913           .64                3.2
LMR-400        .65                3.3
RG-213         1.0                5.0

Based on the above, I'd recommend 3/4" CATV cable Andrew LDF5-50A, or LDF4-50A.   3/4" CATV cable is excellent low loss cable for a modest (often no) cost.

73!
Frank
W3LPL

---- Original message ----
>Date: Mon, 7 Aug 2006 16:41:31 -0500
>From: "Keith Dutson" <kdutson at sbcglobal.net>  
>Subject: [TowerTalk] Coax Run To Tower  
>To: "TowerTalk" <towertalk at contesting.com>
>
>I have to make a rather long run from the shack to tower, about 500 feet.
>This tower will have 2 el 80 + 8/8/8 stack 10 + log periodic covering 30-10.
>What kind of coax would you run assuming only one line is needed, switched
>between the three arrays?
>
>73, Keith NM5G
>
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