[TowerTalk] Vertical Antenna Tubing Strength (was: Increasing effective 4SQR array bandwidth???

[Richard Karlquist]

The secret to using 4 inch irrigation tubing is to never drill
holes in it.  Only clamp it using 4 inch Sch. 40 PVC pipe
as a collar.  The nominal I.D. of that pipe is 3.999 inches
so it is a perfect fit for 4 inch O.D. tubing.  Details on
this at:  http://www.karlquist.com/Irrigation/irrigation.html

richard@karlquist.com
www.karlquist.com

>N6BV wanted me to write our experiences but I was too embarrassed to go
through
>all our blunders. Sometimes the verticals were up for only three days

>We did try 4" irrigation pipe but the diameter did not overcome the
weakness of
>the thin wall. After more than 2 years of trying different designs we ended
up
>where we are now. Great bandwidth with 2" pipe.

>Dick -  KB1H


List Sponsored by AN Wireless:  AN Wireless handles Rohn tower systems,
Trylon Titan towers, coax, hardline and more. Also check out our self
supporting towers up to 96 feet for under $1500!!  http://www.anwireless.com

-----
FAQ on WWW:               http://www.contesting.com/FAQ/towertalk
Submissions:              towertalk@contesting.com
Administrative requests:  towertalk-REQUEST@contesting.com
Problems:                 owner-towertalk@contesting.com