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Re: [TowerTalk] Burying LDF4-50

To: <>
Subject: Re: [TowerTalk] Burying LDF4-50
From: "Eugene Jensen" <>
Date: Sun, 3 Apr 2011 18:19:13 -0400
List-post: <">>
I personally do not see much of a cost savings between using grey electrical
conduit with the Schedule 40 Elbows which will give you a nice gentle 90
degree sweep and the stuff is extremely bullet proof. It is readily
available, I believe in most of the Home Depot, Loews etc. and I am a great
believer if you use the right material, then you can expect having the right
job at the end.  As far as the issue of water, they will all fill up with
water sooner or later, and in the field, we usually use a jack hammer
compressor to blow it out.  You would be amazed as to how much water you can
get out of 500 feet of filled conduit. AS for grey electrical conduit, I
have seen bake in the sun for decades and never be effected.  73's  Gene

-----Original Message-----
[] On Behalf Of Jon Casamajor
Sent: Sunday, April 03, 2011 4:52 PM
Subject: [TowerTalk] Burying LDF4-50

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



>>> Message: 1

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

From: K8RI on TT <>

Subject: Re: [TowerTalk] burying hardline


Message-ID: <>

Content-Type: text/plain; charset=ISO-8859-1; format=flowed


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




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