Topband: Coax for Top-band beverage antenna

[FZ Bruce]

Different location, different problems. Use the good stuff, to avoid
being surprised.
73Bruce-K1FZ

	-----------------------------------------From: "Jeremy Maris" 
To: topband at contesting.com
Cc: 
Sent: Thursday September 19 2019 1:40:33PM
Subject: Re: Topband: Coax for Top-band beverage antenna

That depends upon the length of the feedline: cheap copper plated
satellite RG6 has a *lot* of attenuation at 2MHz, as much as 3.6dB per
100m

 We have a 750m coax feed to our beverages and attenuation DOES matter
on long feed lines. We had ~ 25dB !

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 Caveat emptor.
 
 Jeremy G3XDK/G4AQG
 
 
 > On 19 Sep 2019, at 17:57, K4SAV <RadioXX at charter.net> wrote:
 > 
 > Don't worry about feedline loss for a Beverage. A few dB loss isn't
going to make any difference at all. You can worry about feedline loss
for transmit antennas, not for receiving antennas.
 > 
 > Jerry, K4SAV
 > 
 > 
 > On 9/19/2019 10:17 AM, Kevin Shea via Topband wrote:
 >> I have read that the skin effect at 2 MHz may be deeper than the
copper coating on a copper covered steel inner conductor of most RG6
cables. Thus, as I plan for long cable runs back from my (to be
installed) Beverages I am thinking I need either solid copper, solid
aluminum,. or copper covered aluminum for my RG6 coax. So the question
is am I wrong in this understanding?
 >> Also, does the shield matter? It's not very thick so does a foil
and 60% aluminum shield do the job? Or should I be looking at a foil
and 95 percent copper shield like the Belden 1694.
 >> I know it may not be too material but I want to make an informed
decision.
 >> Thanks! and
 >> 73,
 >> Kevin, N9JKP
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