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[TowerTalk] Coaxial Cable Attenuation Chart

To: <towertalk@contesting.com>
Subject: [TowerTalk] Coaxial Cable Attenuation Chart
From: tgold@panix.com (Anthony R. Gold)
Date: Sat, 27 Sep 1997 09:09:15 +0100 BST
In message <Pine.OSF.3.95.970925184752.17011A-100000@jekyll.sgate.com> Frank 
Donovan writes:

> Here's a copy of the coaxial cable attenuation chart.
> The loss of 1/2" CATV cable is fairly close to RG-17 at HF frequencies.

>              1.8   3.5   7.0  14.0  21.0  28.0  50.0   144   440  1296 
> 
> LDF5-50A     .04   .06   .09   .14   .17   .19   .26   .45   0.8   1.5
> FXA78-50J    .06   .08   .13   .17   .23   .27   .39   .77   1.4   2.8
> 3/4" CATV    .06   .08   .13   .17   .23   .26   .38   .62   1.7   3.0
> LDF4-50A     .09   .13   .17   .25   .31   .36   .48   .84   1.4   2.5
> RG-17        .10   .13   .18   .27   .34   .40   .50   1.3   2.5   5.0

I find the CATV cable numbers suspect above 2m.  There is a much 
greater rise in attenuation from 144 to 440MHz for this one cable 
(more than a tripling of dB/100ft) than for the others.

Regards,
-- 
   Tony - G3SKR / W2TG                   email: tgold@panix.com

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