[TowerTalk] Flagpoles as a Stealth Antenna

[alsopb]

Why fiberglass? I think were are talking HF here (not VHF or
microwaves) and need all the height of the vertical radiator we can
get. Why not metal and just supply an insulating base?  That would
simplify the feeding and could easily be hidden.  A two section metal
mast with the ability to hide a top loading coil between sections
would be nearly ideal.  Perhaps the flag "rope" could also be metalic
and used as a capacity hat.

73 de Brian/K3KO

Tower2sell@aol.com wrote:
> 
> It seams you have missed the basic point - Flag poles are being widely used
> and the next time you spot one you will understand what is behind the radomes
> and how they work. The adaptation to the HAM market is not there yet, mainly
> due to price. Maybe, just maybe, someone will be inspired enough to develop
> this product into a cost effective product. Maybe some antenna manufacturer
> can make a fiberglass flagpole that is also an antenna. WOW maybe it could be
> patented. Maybe there will be another retired millionaire. All just because
> someone posted a message. Isn't America a great country!
> 
> Tower2sell@aol.com
> 
> In a message dated Wed, 20 Dec 2000  8:34:28 PM Eastern Standard Time, Jim
> Nipper <jnipper@southeast.net> writes:
> 
> << Surely this unsigned reply is not a serious (or helpful?) response to
> this gentleman's questions about a possible HAM antenna.  I doubt he
> needed the engineering details of a 12-30 INCH flagpole, or the base
> requirements to keep the mammouth structure in the air.   The gentleman
> was asking about a SIMPLE VERTICAL ANTENNA !!!!!!   I would this that if
> this gentleman could erect a THIRTY INCH DIAMMETER flagpole in his yard,
> he could easily put up a 15inch width TOWER, and likely would not be
> asking questions about a VERTICAL !!!!!!!
> 
> 73 de Jim K4PYT
> 
> Tower2sell@aol.com wrote:
> >
> > Flagpoles are a hot item in the commercial world and are quite pricey for
> the
> > HAM radio. The commercial operators use a fiberglass radome on top of a
> steel
> > pole (tapered or pipe). Normally there are three or more flat panel
> antennas.
> > Some arrangements have them at 0, 120, 240 and another arrangement is to
> > stack them vertically. They normally do not use a standard flagpole because
> > the diameter is too small. The flagpoles they use range in diameter from
> > about 12" to 30".
> >
> > On top of a flag pole is the flagpole truck and ball. A flagpole truck is a
> > set of bearings that swings around with the flag and keeps it from wraping
> > around the pole. The largest "normal" truck fits a 7.5" pole with maybe a
> 12"
> > truck being available. The larger diameters require a custom made truck
> > assembly.
> >
> > Now if all you need to do is mount a whip type antenna, you could use a
> > standard fiberglass flagpole and "hang" it from the top inside the pole. The
> > flagpole foundations are about 10% of the flagpole and one could come in
> > underground and up the pole. Leave some extra cable in the pole so that you
> > can pull the antenna all the way out the top. Now for the ball and truck
> > assembly - find one that attaches with set screws instead on the convential
> > 1-1/4" pipe thread.
> >
> > No one will know where your antenna is and the exercise pogram to service
> the
> > antenna will keep you in top physical shape climbing the slick flagpole (the
> > rope should help some).
> >
> > Tower2sell@aol.com
> >
> > In a message dated Wed, 20 Dec 2000 10:25:18 AM Eastern Standard Time,
> > Richard Thorne <rthorne@tcac.net> writes:
> >
> > << Hello Group:
> >
> > A friend mentioned and idea for a stealth antenna that got me to
> > thinking.
> >
> > Anyone out there using a flagpole as a vertical?  If so is it
> > metal/fiberglass?  How do you feed it.
> >
> > Looking for multi band ideas, say 10 through 40.
> >
> > Thanks in advance.
> >
> > --
> > 73,
> >
> > Richard Thorne
> > ARS N5ZC (ex KA2DSY, N2BHP, WB5M)
> > Remote Control Airplanes:  AMA# 657062
> > http://www.tcac.net/~rthorne/
> >
> > --
> > FAQ on WWW:               http://www.contesting.com/FAQ/towertalk
> > Submissions:              towertalk@contesting.com
> > Administrative requests:  towertalk-REQUEST@contesting.com
> > Problems:                 owner-towertalk@contesting.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
>  >>
> 
> --
> FAQ on WWW:               http://www.contesting.com/FAQ/towertalk
> Submissions:              towertalk@contesting.com
> Administrative requests:  towertalk-REQUEST@contesting.com
> Problems:                 owner-towertalk@contesting.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