Hi All,
Just to reflect what has happened in the past, N6BT did a DXPD to 6Y. He
had verticals on the beach. As understand it his radials were sloped toward
the water so they terminated maybe 100 feet from the shore. That made sense
to me because seawater is lousy for conduction currents but great for
electromagnetic wave propagation. In other words, let the antennas and
radials do the radiation and let the saltwater do the propagation. I heard
6Y2J I think it was about 1½ hours before sundown here in AZ. It was
amazing. I don't know what his ground was.
73 Hardy N7RT
----- Original Message -----
From: <k3bu@optimum.net>
To: "Hugh Valentine" <hsvdds@juno.com>
Cc: <Topband@Contesting.com>
Sent: Tuesday, March 02, 2010 7:29 AM
Subject: Re: Topband: Magic Antenna Land
Howdy Oval,you are one lucky SOB! Being close to salt water, ideally if on
the beeeech, your best and least complicated solution is just to run two
elevated radials (see Team Vertical exploits). That completes the efficient
antenna standing wave resonant system, which then uses "perfect" ground to
enhance the vertical's performance especially at low angles. Increased gain,
lower angle.Another solution is to run piece of "ground wire" to the salt
water, only wire in contact with water surface is effective, no need to go
deep. Then you are on the mercy of tide "tuning" your antenna.The salt water
is the prime beneficiatitor to the antenna performance, adding 3cxxxxx will
help to create the propagation and boil the salty water and produce some sea
salt which is effectively used instead of toothpaste.HIH, 73 Yuri da 3BUm>
Oval gets pretty good results but is wondering what effect his > ground rod
in Salt water is having on his antenna performance. > Oval disconnects the
Ground rod and runs on Radials only. He is > wunderin....did I improve or
degrade my signal???....and he > wonders if he could measure current flow in
the 1/4" ground bus > to the ground rod...would it show any current flow and
how would > that compare to the current flow in the radials....???? Will >
his SWR change?> > Do we have any antenna theorists who could help Oval in
his query?> > 73> Val> N4RJ>
_______________________________________________
UR RST IS ... ... ..9 QSB QSB - hw? BK
_______________________________________________
UR RST IS ... ... ..9 QSB QSB - hw? BK
|