[VHFcontesting] Fwd: MAST FOR ROVERS

Tue Aug 10 16:08:59 EDT 2021

---------- Forwarded message ---------
From: Jay Sturtevant <k2ztdx at gmail.com>
Date: Tue, Aug 10, 2021, 4:03 PM
Subject: Re: [VHFcontesting] MAST FOR ROVERS
To: Ethan Miller K8GU <ethan at k8gu.com>

Hello,

Is anyone else using Penninger masts?

I operate portable on top of the Niagara  (Lockport) Escarpment in Cambria,
NY.

I use a Penninger Radio, 24 ft. mast supported by a Penninger two inch
trailer hitch mount tipper. It is not a guick set up, but it is robust and
safe.

Again, for me, it takes time to assemble the hitch mount, 3 eight foot
sections of aluminum mast (1/4 in. wall), and 3 guy lines, but it supports
my Directive Systems beams.

Maybe I should have opted for 1/8 wall thickness?

Thanks!

Jay, K2ZT

On Tue, Aug 10, 2021, 9:52 AM Ethan Miller K8GU <ethan at k8gu.com> wrote:

> Like Ron, WZ1V, I've used the DX Engineering 0.12-inch wall 6061 to build
> masts for a scientific project in Puerto Rico where they support antennas
> about the size of a 6m Moxon.  I used three sections overlapped by about 1
> foot and guyed at two levels with 3mm Mastrant-M; we pinned them
> 6-inches/90 degrees apart with 5/16-inch bolts.  This is very easy to work
> with and can be handled by one person (in full disclosure, I'm 40 and was
> 34 at the time I set up the experiment).  These masts survived a direct hit
> from Hurricane Irma, followed by a glancing blow from the more infamous
> Maria.  It was quite something to see them still standing with destruction
> all around in the aerial survey imagery after the storm.
>
> 73,
>
> --Ethan, K8GU.
>
>
> On Tue, Aug 10, 2021 at 9:27 AM Ron Klimas WZ1V <wz1v at sbcglobal.net>
> wrote:
>
> > Also - DX Engineering has 6 foot 0.12 inch wall 6061-T8
> > aluminum tubing up to 3 inch OD. You can slit one end
> > of these and hose clamp together for a rigid push-up mast.
> > I bought a 1.25 inch piece somewhere else to make a
> > 8 section 34 foot mast with 2 feet overlap each section.
> > With rope guys at top, it supports small beams with rotor.
> > With 3 ft 1 in overlap it's self supporting at 25.5 feet.
> > 73 Ron WZ1V
> >
> > ----- Original Message -----
> > From: "Terry Price" <terry at directivesystems.com>
> > To: "'Jim Johnson'" <jim at kc4hw.com>, <FFMA at groups.io>,        <
> > vhfcontesting at contesting.com>
> > Date: Mon, 9 Aug 2021 21:38:40 -0400
> > Subject: Re: [VHFcontesting] [FFMA] MAST FOR ROVERS
> >
> > > I am very lucky to have a 40' and a 55' pneumatic mast on my 1994 Dodge
> > van
> > > for roving. Using compressed air or a nitrogen tank to raise the
> antenna
> > > stack is VERY nice, fast and effort less! However, if I didn't have
> > these, I
> > > would build a telescopic mast using this stuff.
> > >
> >
> https://www.mcmaster.com/square-tubing/steel-bolt-together-framing-and-fitti
> > > ngs/
> > >
> > > I can't remember where I saw it or who had it but a rover in the
> Midwest
> > I
> > > believe had a mast made of this stuff and it was one of the best I've
> > ever
> > > seen. He had a crank system to raise and lower it. It's not cheap but
> it
> > was
> > > robust and it worked very well.
> > >
> > > Terry - W8ZN (K8GP/R)
> > >
> > > -----Original Message-----
> > > From: VHFcontesting
> > > [mailto:vhfcontesting-bounces+terry=
> directivesystems.com at contesting.com]
> > On
> > > Behalf Of Jim Johnson
> > > Sent: Monday, August 9, 2021 5:20 PM
> > > To: FFMA at groups.io; vhfcontesting at contesting.com
> > > Subject: Re: [VHFcontesting] [FFMA] MAST FOR ROVERS
> > >
> > > I
> > > don't think the following would represent the best solution, but I too
> > have
> > > been thinking about this and thought that I would try to use some of
> the
> > 1m
> > > fiberglass military poles.  My thought was to used adjustable clamps
> > above
> > > and below each joint., with a total of 5 pieces that you be a length of
> > 16'-
> > > 9".  Which would perhaps give enough height to clear vicinity
> obstacles,
> > > like vehicles, RV, tents, etc
> > >
> > > Been working on a 3L 6m antenna and probably just the one antenna to
> > start
> > > with.  I believe that this mast would support a HO Loop for 2m and/or
> > 70cm
> > > as well.  Perhaps a small rotor could be installed at the 2nd joint.
>  I
> > > think the "Armstrong" rotor with be my initial method.
> > >
> > > My biggest concern is managing a scope out pole, as I am now 73 I don't
> > > think that I will be getting any stronger in the coming years.  hi hi.
> > >
> > > I definitely would be interested in what others have to suggest.
> > >
> > > Jim/KC4HW - EM71 Alabama
> > >
> > >
> > > ----- Original Message -----
> > > From: Robert W5AJ <woodr90 at gmail.com>
> > > Reply-To: <FFMA at groups.io>
> > > To: <FFMA at groups.io>
> > > Sent: 8/9/2021 2:43:56 PM
> > > Subject: [FFMA] MAST FOR ROVERS
> > >
> > >
> > > Recently purchased a mast support for Truck receiver hitch.
>  "Portable"
> > > five element beam is in possession.   What type of portable masts are
> > being
> > > used that can be easily carried inside pickup bed or short SUV?????
> > >
> > > 73 W5AJ
> > >
> > > The mast support:  https://smile.amazon.com/gp/product/B07ZGBRT61
> > I'm not
> > > recommending it or otherwise, hopefully it works for Rover use -
> parked.
> > > _._,_._,_
> > >
> > >
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> > > [jim at kc4hw.com]
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