can you route the cable through a PVC pipe...gray stuff/UV exposure rated?
That would be easier to tie down I would think...
K4OJ
----- Original Message -----
From: "Pete Goudreau" <goudpj@mac.com>
To: <towertalk@contesting.com>
Sent: Wednesday, February 13, 2002 8:34 PM
Subject: [TowerTalk] Routing coax across roof (long)
>
> A question to the list.
>
> From a planned antenna installation on a chimney, coax (BuryFlex)
> needs to be routed roughly 10' along the adjacent sloping roof
> surface to a ridge where it needs to run about 20' to the gable peak
> where it can run down an unrelated fiberglass mast and then to the
> ground along with a couple of other feedlines.
>
> The problem I'm trying to find a simple solution to is one of
> protecting the shingles from damage as a free coax run would cause a
> working back and forth across the shingles in the wind over time.
> Anchoring the coax seems to be a good solution but with what? And
> how to do it so the wind won't lift the whole line and damage the
> shingles or cause a leak?
>
> An alternative seems to be to rig sleepers over and along the ridge
> so that they don't have to be anchored but how to keep the whole
> thing from lifting in the wind and causing damage anyway? And what
> would they be made of? Commercial sleepers are PVC but meant to lie
> flat on a flat roof, not sure it'd be a good choice in this
> application.
>
> Thought about running a cable directly from the lower chimney mount
> to the fiberglass mast (pretty much a level run) and having it
> support the feedline, as a catenary, but the tension required is in
> the hundreds of pound range for a sag of a foot or more. Not sure I
> want to subject the chimney to any more loading than is necessary and
> it's a bit of a side load on the fiberglass mast, too.
>
> So, I'm pretty much out of options. Is there some commonly available
> roofing item that makes this an easy thing to do or is there some
> other way to do this that I'm missing?
>
> Running in to the attic space is not an option, I think, as there's a
> gas line for the furnace there and lightning wouldn't be a good thing.
>
> This feedline, and the others it meets up with at the fiberglass
> mast, are to be grounded via Times ground kits, through a Harger #301
> clamp, to a copper clad ground rod where they come to the ground and
> are then buried around to the master ground bar at the service
> entrance. This ground rod is part of a lightning ground field as
> well.
>
> Any suggestions, thoughts, pointers, etc., are greatly appreciated.
>
> Thanks,
> Pete Goudreau, AD5HD
>
> ________________________________________________________________________
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________________________________________________________________________
Where do you get ICE bandpass filters & beverage matching boxes? The
same place that pays for the hosting of this list: The eHam Store.
Order online at http://store.eham.net.
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