Topband: Fsj4 series heliax around a rotor

[Peter Voelpel]

I turn 1/2" Cellflex cable which is similar to FSJ4 for more then 30 years
and never had a problem.
On one tower I turn a bunch of 5 cables at once.

And yes, never damage by critters since using that kind of cable on all
bands, also as feed lines for beverages.

73
Peter

-----Original Message-----
From: Topband [mailto:topband-bounces at contesting.com] On Behalf Of Carl
Sent: Sonntag, 8. Juni 2014 15:33
To: jim at audiosystemsgroup.com; topband at contesting.com
Subject: Re: Topband: Fsj4 series heliax around a rotor

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 at audiosystemsgroup.com>
To: <topband at 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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