Subject: Re: [Antennas] Telescoping Aluminum Tubing

Mon, 7 Jan 2002 23:48:03 -0500

One technique I use to erect masts for Field Day (and it should work well
for other times) is to use a short pole pivoted at the same point as the
pivot for the mast, but with an angle of approximately 90 degrees to the
mast.  I tie all the guys for one direction to that pole and tension them
appropriately, and then pull the top of the pole down.  The mast comes up
but doesn't bend in the middle (assuming I tensioned the guys correctly).

My next modification to this is to set up a pair of outriggers on the short
pole and run some guys to each end of the outriggers.  This will keep the
mast from swaying as it comes up.

Maybe this is useful.

Dave WB4FUR

----- Original Message -----
From: Richard Karlquist <[email protected]>
To: <[email protected]>
Sent: Friday, January 04, 2002 2:54 PM
Subject: RE: Subject: Re: [Antennas] Telescoping Aluminum Tubing

> I used to have a 50 foot 80 meter vertical made from
> 4 inch .050 wall aluminum irrigation tubing.  I was
> able to walk that up by myself.  A 60 foot version
> required a helper on the ground pulling a rope while
> I walked it up.  It was mounted in a pivot on the ground.
> I am building a new 60 foot vertical with 3 inch
> tubing to 30 feet and 2 inch above that.  I think I
> can walk this up (if no wind).
>
> BTW, if you have any wind, then it will either be
> a lot harder or a lot easier, depending on the
> direction of the wind :-)
>
> Rick N6RK
>
> > -----Original Message-----
> > From: [email protected]
> > [mailto:[email protected]]On Behalf Of Jim Hill
> > Sent: Thursday, January 03, 2002 9:35 PM
> > To: [email protected]
> > Subject: Subject: Re: [Antennas] Telescoping Aluminum Tubing
> >
> >
> > Thanks to all for the useful information my post generated.
> > Assuming I purchase 6' lengths of 6063-T832 drawn aluminum tubing (the
> > tubing where each size telescopes into the adjacent sizes) from Texas
> > Towers, how high a vertical do you think I could erect with one person
> > walking the tubing up and another person holding the bottom on
> > the ground?
> > If I purchased each size and telescoped them with a 1' overlap, I
> > calculate
> > I would have a 76' length.  Assuming the tubing didn't buckle, I think
> > erecting it would be a big problem.  I would like to be able to
> > erect an 80
> > meter vertical, which ideally would be around 60' high. Those of you who
> > erected 40' antennas,  could you have gone higher without serious
> > difficulties? What was the maximum size tubing you used?
> > Thanks, Jim, w6ivw
> >
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