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Re: [TowerTalk] Radio Frequency Systems Cable

To: Don Havlicek <>,Keith Dutson <>
Subject: Re: [TowerTalk] Radio Frequency Systems Cable
From: Jim Lux <>
Date: Thu, 21 Dec 2006 10:07:32 -0800
List-post: <>
At 06:24 PM 12/20/2006, Don Havlicek wrote:
>By putting the amplifier at the antenna, too.
>Simple solution with a lot of logistics to overcome.

OTOH, there's pretty significant logistics issues with running BIG 
low loss not so flexible coax, and unless the coax is surplus, it 
could be pretty expensive (esp with connectors, etc.).  It could well 
be that it's cheaper to use smaller coax and spend the money on the 
amp, as long as the powers are reasonable.

In the broadcast world with 50kW transmitters, it's worth it to buy 
big low loss coax.  But if you were thinking in the 100 Watt class, 
where amps are a few hundred dollars, the trade might be the other way.

Of course, there's the whole lightning issue, too., but a direct hit 
might take out all that expensive coax, too.

There are LOTS of commercial installations with amps sitting up next 
to the antenna, so the reliability issue can be solved, it might be 
pricey though. 


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