[Antennas] Suggestions Hardline Feedline Run

[Gary K9GS]

That's silly....

You can never seal against moisture and condensation.  That's exactly why 
you have to do more than lay some feedline in a trench or throw some PVC 
pipe down.  The bottom of the trench should be lines with gravel to allow 
for proper drainage.  The PVC should be properly pitched to allow water to 
drain properly, preferably at more than one location.  PVC should also have 
holes to allow water to drain facing down.  Bury it deep enough that the 
freeze/thaw cycle won't hurt the cable.

Use good quality cable and test/inspect regularly.


73,
 Gary

 ++++++++++++++++++++++++++++++++++++++++++++++++
  K9GS
  Gary Schwartz           email: k9gs at arrl.net
  Check out K9NS on the web: http://www.k9ns.com
  Society of Midwest Contesters (SMC)     GMDXA
 ++++++++++++++++++++++++++++++++++++++++++++++++

----- Original Message ----- 
From: "Joe" <nss at mwt.net>
To: "Eric Lemmon" <wb6fly at verizon.net>
Cc: "'Charles E. Pitts'" <cpitts at ec.rr.com>; <antennas at mailman.qth.net>
Sent: Wednesday, August 29, 2007 8:39 PM
Subject: Re: [Antennas] Suggestions Hardline Feedline Run


> My Past Experiences,,,
>
> Eric Lemmon wrote:
>
>>Ed,
>>
>>Regardless of your feelings about burial, it definitely is the way to go.
>>
> I do NOT agree.
>
>>I strongly suggest engaging a backhoe to dig a trench at least 24 inches
>>deep but preferably 30 inches, and wide enough to lay two 3" or 4" 
>>schedule
>>40 PVC conduits under the roadway and at least five feet each side of the
>>road edge.  Normally, three 10-foot sections of pipe, properly cemented,
>>will suffice for each run.  Once you have made this pathway, you will 
>>never
>>have to worry about burying cable under the roadway again.
>>
> Or at least until a year or so later when you will need to run new cable 
> because the stuff you installed is no longer any good.
>
> We also thought this was a great idea burying the cable in some PVC pipe, 
> till  due to condensation,  and it WILL  have moisture condence inside the 
> pipe.  eventually  enough water will condence in the pipe so that the pipe 
> is filled with water.  then winter comes and freezes the water  crushing 
> the feedline.
>
> just a awesome way to ruin a lenght of 7/8"  heiliax
>
> Joe WB9SBD
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