Yes, I can tell you...No, absolutely not! 25G isn't self-supporting
at any height. Additionally, if you were to erect this 40' tower
without guying it, someone would have to climb it and install the
antenna...making for a very dangerous situation. The ice loading
situation that someone else mentioned is another reason not to do this.
Granted, hams have used this technique and gotten away with it for
years...but that doesn't justify doing it. You should either guy the
25G installation or use self-supporting tower.
At 05:32 AM 5/10/2006, you wrote:
> > -----Original Message-----
> > From: firstname.lastname@example.org
> > [mailto:email@example.com] On Behalf Of Martin
> > & Ann Mein
> > Sent: Monday, May 08, 2006 8:37 PM
> > To: Towertalk@contesting.com
> > Subject: [TowerTalk] self-supporting rohn 25g??
> > Hi all,
> > Can anyone tell me if it's OK to install a 40' tower, made from
> four 10-foot sections of Rohn 25G, as a self-suppoting
> > tower? The antenna that wpould be on the tower is a small
> omni-directional circularly-polarized FM antenna for 95.9
> > MHZ, so it is small with not much windload. How big does the
> cement base have to be? Locally, the minimum concrete order
> > is 4 yards. We are located in upstate NY. 4 yards would be
> somewhere around a 4.5' X 4.5' X 5.5' foot base.
> > Thanks and 73...
> > Jeff KP3FT
> > Spirit And Truth Christian Radio WJIH-LP 95.9
Robin Midgett K4IDC
615-322-5836 office - rolls to pager
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