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Re: Topband: Fsj4 series heliax around a rotor

To: <jim@audiosystemsgroup.com>, <topband@contesting.com>
Subject: Re: Topband: Fsj4 series heliax around a rotor
From: "Carl" <km1h@jeremy.mv.com>
Date: Sun, 8 Jun 2014 09:33:16 -0400
List-post: <topband@contesting.com">mailto:topband@contesting.com>
More of a topic for a VHF/UHF forum where the question comes up often..

I use that coax on the mast and to power dividers and out to individual yagis but it certainly is not meant to survive long around a rotator. There I use LMR400UF and into a 50-75 Ohm coax line transformer into .75 to 1" 75 Ohm CATV hardline for 144 MHz and higher.

Another line transformer converts back to 50 Ohms in the house to keep the several Bird 43 line sections and elements happy.

Carl
KM1H


----- Original Message ----- From: "Jim Brown" <jim@audiosystemsgroup.com>
To: <topband@contesting.com>
Sent: Saturday, June 07, 2014 11:09 PM
Subject: Re: Topband: Fsj4 series heliax around a rotor


This would be a natural topic for Tower Talk.  Access via contesting.com

73, Jim K9YC

On 6/7/2014 7:03 PM, Bill Wichers wrote:
I'm thinking about replacing the lmr400 with fsj4-50b heliax since I have several thousand feet of that on a reel. I'm also thinking that the corrugated copper shield will resist critter damage better than the braid in the lmr400 cable.

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