[TowerTalk] Burying LDF4-50

[Jon Casamajor]

I have a run of LDF4-50 that was buried to feed antennae on a tower I bought
and moved back in 1987. I pulled up the hard line, coiled it up and moved
it. I installed the tower in1988 and  direct buried the HL about 6" deep
across my back yard to the tower 86' away. In those 23 years I have had no
failures and have only occasionally cleaned up the fittings to check their
condition.  No heavy vehicles, just a garden tractor/mower. 

 

73, Jon

K6EL

 

>>> Message: 1

Date: Sun, 03 Apr 2011 03:08:35 -0400

From: K8RI on TT <k8ri-on-towertalk at tm.net>

Subject: Re: [TowerTalk] burying hardline

To: towertalk at contesting.com

Message-ID: <4D981CF3.5000602 at tm.net>

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On 4/3/2011 1:24 AM, Mark, K5ER wrote:

I've found LDF4-50 (1/2" Heliax) to be a bit on the fragile side and easily
crushed. Were it me, and it's not, I'd put all feedlines in PVC conduit.
The reason is that yards can at times get soft and if your tires sink in as
you cross the feedlines it can be a mess. To me the PVC is cheap insurance.
I'd run the control lines either under the conduit, or in their own conduit.
OTOH although it's not good practice I do have some control lines in the
same conduit with the feed lines.  I use lower loss LMR-600 which has a
smaller minimum bend radius and is much more crush/kink resistant than
LDF4-50