Terry:
If water gets into your conduits (and there's nothing typically that we
hams do to prevent that from happening), then more water will get in later.
And more after that, etc. Unless your coax jacketing material is
direct-buriable, then you ought to provide some means of draining the
condensation.
I suggest holes in the low points of the conduit. But don't stop
there. Dig a small pit beneath the holes (easier if you do this BEFORE the
conduit is buried) and fill the pit with gravel or small stones a' la Rohn.
The drained water will then percolate into the ground away from the conduit
and make room for more water inside.
One final step: To keep life forms from taking refuge inside the
conduit via the holes, wrap the conduit at the holes with flower bed
screening - the stuff used to keep weeds down in flower beds. Tie the
material in place with stiff wire pieces.
Ain't towers fun?
73 de
Gene Smar AD3F
P.S. Merry Christmas to all!
----- Original Message -----
From: "Terry Gerdes" <terry@ab5k.net>
To: <towertalk@contesting.com>
Sent: Thursday, December 23, 2004 4:02 PM
Subject: Re: [TowerTalk] Pulling wire
> What are the thoughts pertaining to condensation in the pvc pipe. Do you
> drill holes in the pvc pipe at the low points or just let the cables set
in
> water? Thanks
>
> Terry - AB5K
>
>
> ----- Original Message -----
> From: "Marc Wullaert" <marc.wullaert3@pandora.be>
> To: <towertalk@contesting.com>
> Sent: Thursday, December 23, 2004 2:39 PM
> Subject: Re: [TowerTalk] Pulling wire
>
>
> > My experience:
> >
> > Several years a go I put a big plastic pipe (8inch dia) under the house
to
> > the towers.
> > There are several coax'es 7/8 in them ,and a lot of controlwires.Those
> pipes
> > came out at
> > the towers and coax'es en control wires (rotor -switching) moving up at
> > thetower.
> > 2 years ago I chanced the whole antenna system and placed kabinets at
each
> > tower.
> > When I toke all the cabels out the pipes most off controlwires where
> > strangled around coax
> > and others wires.A lot off work.
> > I have now taped 2 control wires at 1 coax and vica versa.Yes I had some
> > spare coax and controlwires
> > so putt it all in.I'f something go wrong a have another control
cable.And
> > if something wrong with a
> > coax (I dont think for the first 20years) I can easely checked with the
> > labels and remove them easely.
> >
> > for pull rope I use a small SS cable.Making a plan off all wires and
label
> > them.Very easy even in the dark
> > O yes "I have lights in the cabinets"
> > marc on4ma
> >
> > ----- Original Message -----
> > From: <K4BEV@aol.com>
> > To: <towertalk@contesting.com>
> > Sent: Thursday, December 23, 2004 7:17 PM
> > Subject: [TowerTalk] Pulling wire
> >
> >
> > > Some FB ideas have been presented in the "Pull rope in PVC" thread.
> > >
> > > Also, ALWAYS:
> > > Pull AT LEAST 10% spares for control wires and coaxial cables.
> > > Go up AT LEAST one size larger conduit than needed. There are tables
> > > indicating how much of what will fit in which size of conduit.
> > > Label everything at both ends.
> > > Make a drawing, or (better) take a picture of the run before its
> covered,
> > if
> > > buried.
> > > Use stranded THHN or similar (has a slick jacket) for control wires.
MTW
> > > (soft jacket) is great for making bends in a panel, but NO fun to pull
> > through
> > > anything.
> > > One word -- Wire Lube! I like Ideal Yellow 77 - Works great, lasts a
> long
> > > time, won't hurt the insulation.
> > > Pull more out than needed at the end of the run and carefully inspect
> > every
> > > wire. If ANY are roughed up pull the entire run back out and find the
> > problem.
> > > This is almost never a problem with plastic pipe, but a burr missed
when
> > > cutting steel conduit can create real problems later.
> > > 90 degree fittings are OK for control wire (no more that 360 deg
total)
> ,
> > but
> > > use sweeps if coax is involved.
> > >
> > > If you tape your wires together before a pull - Remove ALL tape before
> it
> > > enters the conduit.
> > > If you ever need to remove a wire, or use one as a pull, you won't be
> able
> > to
> > > if the wires are taped together.
> > >
> > > Have fun,
> > > Don - K4BEV
> > > _______________________________________________
> > >
> > > See: http://www.mscomputer.com for "Self Supporting Towers",
"Wireless
> > Weather Stations", and lot's more. Call Toll Free, 1-800-333-9041 with
> any
> > questions and ask for Sherman, W2FLA.
> > >
> > > _______________________________________________
> > > TowerTalk mailing list
> > > TowerTalk@contesting.com
> > > http://lists.contesting.com/mailman/listinfo/towertalk
> > >
> >
> > _______________________________________________
> >
> > See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless
> Weather Stations", and lot's more. Call Toll Free, 1-800-333-9041 with
any
> questions and ask for Sherman, W2FLA.
> >
> > _______________________________________________
> > TowerTalk mailing list
> > TowerTalk@contesting.com
> > http://lists.contesting.com/mailman/listinfo/towertalk
> >
>
> _______________________________________________
>
> See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless
Weather Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any
questions and ask for Sherman, W2FLA.
>
> _______________________________________________
> TowerTalk mailing list
> TowerTalk@contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk
_______________________________________________
See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless Weather
Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any questions
and ask for Sherman, W2FLA.
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