[TowerTalk] Alum Masts

[Jerry Kincade]

Tom, I wish you the best of luck, but be sure to plan for access around the
tower for the $300 boom truck you'll need to safely lift that rig out the
top after it's bent. At that point, the galvanized steel mast you'll buy as
a replacement should have a cumulative cost of about $500 to $700, depending
on how much damage the antenna suffered.  :-)
73, Jerry W5KP

----- Original Message -----
From: "Thomas Beltran" <tbeltran@earthlink.net>
To: "Bill Coleman" <aa4lr@arrl.net>; <towertalk@contesting.com>
Sent: Friday, January 11, 2002 12:00 AM
Subject: Re: [TowerTalk] Alum Masts


>
> Bill:
>
> I plan on using a 10" mast, three with the rotator mounted about three
feet
> below the top of the tower, so 7 feet would stick out above the top of the
> tower.  The guy at the industrial metal supply told me that that pipe-wall
> thickness would be 0.120", OD is 2".  So I guess according to your
> statement, that should be fine.  Tom W6EIJ.
>
> ----- Original Message -----
> From: "Bill Coleman" <aa4lr@arrl.net>
> To: "Thomas Beltran" <tbeltran@earthlink.net>; <towertalk@contesting.com>
> Sent: Thursday, January 10, 2002 1:02 PM
> Subject: Re: [TowerTalk] Alum Masts
>
>
> >
> > On 1/10/02 1:03 PM, Thomas Beltran at tbeltran@earthlink.net wrote:
> >
> > >This discussion of Masts is quite timely for me.  I was planning on
using
> > >schedule 80 Aluminum pipe for a TH-3MKIII and perhaps a rotatable
dipole
> for
> > >17.  Should I consider one of HRO's steel masts?
> >
> > Tom,
> >
> > What you left out is how high above the tower top you planned to have
the
> > antenna(s). That makes all the difference.
> >
> > In general, I'd avoid the use of "pipe" of any kind for a structural
> > component, but if the antenna is right at the top of the tower, the
> > bending moments are small enough that even "pipe" would work.
> >
> > I've got an A3S mounted 6 feet above the top of the tower on a 2" Al
tube
> > with a 3/32" wall. Plenty strong enough.
> >
> >
> >
> > Bill Coleman, AA4LR, PP-ASEL        Mail: aa4lr@arrl.net
> > Quote: "Not within a thousand years will man ever fly!"
> >             -- Wilbur Wright, 1901
> >
> >
> >
> > ________________________________________________________________________
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>
> ________________________________________________________________________
> This list is sponsored by the new eHam.net Store.  When you buy products
> like ICE filters, Array Solutions StackMatch, or M-Squared Antennas from
> the eHam Store for the same price you pay direct, a portion of the sale
> price goes to support this list.  Check it out at http://www.eham.net.
>
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>



________________________________________________________________________
This list is sponsored by the new eHam.net Store.  When you buy products
like ICE filters, Array Solutions StackMatch, or M-Squared Antennas from
the eHam Store for the same price you pay direct, a portion of the sale
price goes to support this list.  Check it out at http://www.eham.net.

-----
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