Watching YouTube KE0OG
He uses 2 10 foot top rail Chan in link fence pipe .. the ends are taped / 
enlarged so they lock together  and metal so if u stick to 20ft they don’t bend

https://youtu.be/21Q0HFqWtpQ
On Oct 3, 2020, 1:45 PM -0500, John Mechura via BVARC <bvarc@bvarc.org>, wrote:
> I use two, ten-foot sections of 4-inch diameter thin wall PVC sewer pipe to 
> get to twenty feet for my "portable" Armstrong Dipole.  It does not 
> telescope.  I have installed appropriate threaded fittings so as to assemble 
> / dis-assemble it into two pieces on the ground after which it is deployed, 
> or, returned to storage or transport.  I believe that the two pieces could be 
> glued together if transport was not necessary.
>
> However, walking this up to a vertical position single-handedly may be 
> difficult if the antenna is heavy.  In my situation I am using two "hamstick" 
> vehicle antennas to make a horizontal dipole for 80 meters.
>
> Doesn't rust and can be painted for camouflage.
>
> John, KI5HOC
>
> > On Sat, Oct 3, 2020 at 1:14 PM Martin Blaise via BVARC <bvarc@bvarc.org> 
> > wrote:
> > > Does anyone have a telescoping mast such as a two section 20 footer? I 
> > > have a vertical antenna mfj. 2386 mounted on a part of a mast but the 
> > > mast and its rings and pins are completely rusted out I can no longer 
> > > raise the antenna to proper height (it’s up to the roof eave now it was 
> > > previously at rooftop level at 17 feet above ground actually mfj says 35 
> > > above ground is ideal but that is not a good idea on a city lot) if 
> > > anyone has other ideas let me know thanks AG5T  
> > > ________________________________________________
> > > Brazos Valley Amateur Radio Club
> > >
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> > > BVARC@bvarc.org
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