If you can make the underground run of the conduit such that the low spot is
at each end of the run - and it is at the hgihest altitude in the middle any
large amounts of conensation will tend to move to the ends which are close
to the extit AND venting of the run...making an even trench then
over-digging it at each end tapering down (actually up) in the center will
create a "sad face" bend in the conduit...uou may wish to exagerate this
more than is necessary just to know you have it right - the increased amount
of cable length is miniscule and having your water settle near the open
endsthe best way to make sure it returns to the atmosphere...I assume you
are using sweep bends or something similar at the ends with some sort of
protection to prevent ingress of water into the conduit....
If you puncture the PVC not only will you let water out but more so let it
in!
----- Original Message -----
From: "EUGENE SMAR" <SPELUNK.SUENO@prodigy.net>
To: "Jerry Kincade" <w5kp@swbell.net>; <towertalk@contesting.com>
Sent: Tuesday, April 16, 2002 10:21 PM
Subject: Re: [Towertalk] Cable purchase source info requested
> Dave K0QE (the originator of this thread):
>
> I concur with everyone's recommendation on the PVC conduit, but make
it
> bigger than you think you'll need initially. Being hams, we inevitably
WILL
> change something someday. But I'd add that you ought to provide a drain
> hole in the underside of the conduit at its low point(s). As Jerry said,
> water WILL get in and you have to deal with it. You might also want to
wrap
> some plastic material that's used in flower gardens to keep weeds down
over
> the drain holes. This way the varmints don't get in but the water can get
> out.
>
> The advantage of a conduit system, besides protecting the cable and
> allowing for changing it, is you don't need to buy direct-bury jacketing
for
> your cables. (How many responses to your direct question on buriable
cable
> have you received so far?)
>
> 73 de
> Gene Smar AD3F
>
> -----Original Message-----
> From: Jerry Kincade <w5kp@swbell.net>
> To: towertalk@contesting.com <towertalk@contesting.com>
To: <towertalk@contesting.com>
> Date: Tuesday, April 16, 2002 8:32 PM
> Subject: Re: [Towertalk] Cable purchase source info requested
>
>
> >Certainly good advice, but on the plugging of the ends, I'd recommend a
wad
> >of fiberglass window screen material instead. That allows the conduit to
> >breathe, because no matter what, it WILL have water in it.
> >73, Jerry W5KP
> >
> >----- Original Message -----
> >From: "Mark" <AA6DX@pacbell.net>
> >To: <towertalk@contesting.com>
> >Sent: Tuesday, April 16, 2002 12:54 PM
> >Subject: Re: [Towertalk] Cable purchase source info requested
> >
> >
> >> I certainly concur with Jim ... and, while you are at it ... run some
> >spare
> >> "fish lines" too .. and use conduit large enough to allow easy
> replacement
> >> through the years, and I suggest plugging the ends with OAKUM, which
> keeps
> >> moisture, rodents. etc. out of
> >> your underground system ... it's available in a well stocked hardware
> >> store's plumbing department. Looks like a horse's tail, but dirtier ..
> >> smells bad ... but, worky worky! 73 -- Mark, AA6DX
> >
> >
> >
> >_______________________________________________
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> >Towertalk@contesting.com
> >http://lists.contesting.com/mailman/listinfo/towertalk
>
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