[Antennas] pipe for an antenna

Mon, 22 Apr 2002 01:08:44 -0400

 > Don't forget to factor in the difference in diameter of the pipe.  Not much
 > effect at say 160 or 80M, but noticeable to the antenna length calc at 10M
 > and above....

 > I doubt you'd consider pipe for 40 or 80M use....

   One of my local my HAM clubs [AReU] did an antenna shoot out on
7.125 MHz a few years ago, the reference antenna was made of 3"
diameter aluminum down spout material. Three sections were screwed
with overlapping sheeting.
A 2 liter pop bottle was the base insulator.
   The normally 32 foot length (for wire) turned out to be only 30 feet
tall, three full sections, by calculation and in practice.
(4 & 8 & 16 radials, each produced a 3 dB improvement in far field
signal strength, over the previous)

   I think top rail will make a good antenna elements.

       73 (= Best Regards) de: Ron [email protected]
    100% LINUX, 100% of the time.   SENT Time and Date are UTC
        Visit my HAM Web SITE at: http://www.qsl.net/ka4inm