[TowerTalk] 80-75M Inverted Vee or Dipole

[Avila, Edward]

Also, putting coax in a large enough conduit would allow you to pull it
"through" years from now and replace it with new cable without any digging
-- and, if the pipe is large enough with minimal bends pull additional
cables in the future...initially more work in the beginning, but less work
later on..........gud luck /k6sdw

-----Original Message-----
From: K7GCO@aol.com [mailto:K7GCO@aol.com]
Sent: Monday, September 11, 2000 1:53 PM
To: towertalk@contesting.com; EAvila@caiso.com
Subject: Re: [TowerTalk] 80-75M Inverted Vee or Dipole



In a message dated 9/11/00 7:49:37 AM Pacific Daylight Time,
EAvila@caiso.com 
writes:

<< 
 I'm not a coax expert but in the electrical wiring world they make wire
with
 jackets designed for direct burial and as long as the jacket seal isn't
 harmed will last a lot of years!!
 
 Building code in my part of the world sez if the cable is not direct burial
 it must be in conduit -- a bit more work to pull coax thru plastic pipe but
 then should last the lifetime of the cable and pipe will protect coax must
 better.......73
 
 k6sdw
  >>
In the past you must get coax that is desinged for burial. For example RG8U 
would not last but RG8AU would last 20 years.  The AU also had a
plastisizing 
agent in the outer covering that didn't migrate to the center dialectric and

the outer covering would then crack without it--on purpose.  What has been 
done lately I'm not sure.  A few more bucks for coax specifically designed 
for burial would be a good investment to eliminate the bother of PVC pipe 
although that is a good idea as cheap as it is.  If I had coax designed for 
burial I think I still put shrink on tubing over it even at it's expense.  I

do at the top of the tower where it wraps around the mast--sometimes too 
tight.  k7gco

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