Subject: Re: [Antennas] Telescoping Aluminum Tubing

Mon, 7 Jan 2002 22:16:26 -0800

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