You will need ±63 feet of 3" irrigation pipe. I found a thin wall conduit
that fit inside, barely. I had to slit the conduit lengthwise and compress
it with a couple of SS hose clamps. It then slid in. I used 1.5 foot
sections of conduit to make each splice. I also put a 4' piece into the
bottom section to strengthen it where I clamped it to the cantilevered
4x4's. I built a full size 4 square with this technique and it stayed up
for the 7 years that we lived in SoCal. I guyed my towers at the 25' and
55' levels but it really only needed the 25' guys. Any questions, call me
at 813-643-3034
Bob W6TR
Valrico, FL
----- Original Message -----
From: "Pat Chiles" <chilesp@adelphia.net>
To: <towertalk@contesting.com>
Sent: Friday, November 03, 2006 10:27 AM
Subject: [TowerTalk] Questions about Irrigation Pipe for Verticals
>I am in the process of putting together a project that will consist of
>phased 1/4 wave verticals for 80 meters. For my QTH the most cost
>effective resource of aluminum tubing is 3 inch irrigation pipe. The wall
>thickness is .050 and it comes in 10, 20, and 30 foot lengths. Since I
>will have to transport it myself I will probably buy the 20 ft lengths. I
>am wondering what some of you have done to splice sections together? How
>you varied the length of the vertical for adjusting the SWR.? Finally, How
>did you get it vertical? Thanks
>
> Pat, K8PC
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