Subject: Re: [Antennas] Telescoping Aluminum Tubing

Tue, 08 Jan 2002 18:28:59 -0800

Rick: Interesting web site!  I bought tubing from the source Van Lincoln 
mentioned, and should receive it in a week or less.  More is available; 
contact [email protected] for details.

Rick: is the aluminum irrigation tubing still available? I live in the Los 
Angeles area, but when I was in a farming region, I checked and it seems 
PVC is used now. I went to a large business that sold irrigation supplies, 
and asked if aluminum tubing could be ordered.  It could be (20 or 30' max 
length, I forget which), but they acted like it was a very unusual request.
73's Jim

At 10:16 PM 1/7/2002 -0800, you wrote:
>I use this technique for my 90 foot irrigation
>tubing vertical.  A 45 foot walk up pole is
>used as the "falling derrick" as you described.
>The 45 foot pole has side guys on it as you
>suggest.
>
>Photos of this system going up are on my web
>site (www.n6rk.com).
>
>Rick N6RK
>
> > -----Original Message-----
> > From: [email protected]
> > [mailto:[email protected]]On Behalf Of Dave and Sharon
> > Maples
> > Sent: Monday, January 07, 2002 8:48 PM
> > To: [email protected]
> > Subject: Re: Subject: Re: [Antennas] Telescoping Aluminum Tubing
> >
> >
> > 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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