[TowerTalk] Routing Coax and Control Lines

[Grant Saviers]

I'd caution that "new" generation Heliax is very fragile.  LDF4, FSJ4, 
LDF5 all had much heavier copper shields.  I had to buy some AVA5 after 
my LDF5 ran out and it is an entirely different animal. It is very easy 
to kink and flatten and it is tough to clean the foam without damage to 
the shield.  It was mentioned here that one cell installer won't even 
accept an AVA reel on its side because damage is very likely.

Also, for aerial suspension, falling branches or ice from antennas or 
tower will likely put a significant dent in AVA.  The commercial design 
is an "ice bridge" cover above the suspended Heliax which could be solid 
or perforated/woven/expanded galvanized steel.

Grant KZ1W



On 7/9/2016 11:37 AM, Tom-W3FRG wrote:
> I did a slit trench, an inch or two below the grass roots with the garden
> tractor and put the Heliax directly into it and just drove over it to close
> up the opening.
> Heliax is a direct burial cable.
> I have three runs done this way with a 4 port, remote wireless switch,
> controlling the line back to the station some 130' away.
> Each run goes to approx. the center location of a wire antenna above and
> then back to the RF switch.
>
> Tom W3FRG
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