[ML-Hams] new mast

[Jeff Cotten]

The side of the makeshop is about 40 feet, and we'll have two fixed points
along the side of the building where we're bolting unistrut.  Two rods will
come away from the unistrut and terminate in a clamp around the mast.

Those two fixed points will hold the majority of the mast in place, with
only about 10 feet of the mast going above the building.  I've never done
this, but I don't think we'll have to guy the 10 feet above the roof line.

If we ever decide to mount the mast higher up off the ground to gain
altitude, we may have to guy that.

I've gone ahead and ordered the guy ring just in case.

On Mon, Aug 22, 2016 at 2:07 PM, Kris Kirby <kris at catonic.us> wrote:

> On Mon, 22 Aug 2016, Jeff Cotten wrote:
> > Ok, then I'll go ahead and order a guy ring for the smallest section
> > at the top of the tower
>
> When you stack a tower, you build the tower to the first set of guys,
> guy it, then stack the next section, guy it, stack the next section, and
> guy it. Taking down a tower, you strip it of antennas and coax, then you
> unguy the top section and remove the top section, and so on until you're
> at the next set of guys.
>
> That being said, it may be useful to find a way to rig a plumb-bob to
> the pole, since you can kinda determine which way is straight, but when
> you put guy stress on it, it may attempt to buckle:
>
> https://en.wikipedia.org/wiki/Buckling
>
> You'll recognize the shapes. Don't worry too much about it, fiberglass
> is more flexible than steel, so things can happen. But your guys will
> take the stress of the windload and keep the mast mostly center.
>
> Also remember that you bought fiberglass and it's RF transparent... you
> can make a sleeve dipole and hang it inside suspended from a brass hook
> installed in a pipe cap.
>
> --
> Kris Kirby, KE4AHR
> Disinformation Architect, Systems Mangler, & Network Mismanager
>
> _______________________________________________
> This is the hams mailing list.
> This list is for amateur radio discussion.
> To stop receiving mail from this list, write to
> hams-leave at lists.makerslocal.org.
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.makerslocal.org/pipermail/hams/attachments/20160822/55e16088/attachment.html>