[TowerTalk] Flagpoles as a Stealth Antenna

[Tower2sell@aol.com]

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