[Antennas] Antenna Design Help Please

[Chris BONDE]

I am in no way knowledgeable about antennas.  But I have been reading 
alot.  I shall have to save up some money and by one of those modellers to 
try some of this one.  Understand tha t learning how to use one is a challenge.

Having said that, what yoou have describes sounds a lot like a folded 
unipole by Paul Lee, N6PL.

Chris opr VE7HCB

At 09:32 AM 2002-01-23 -0800, Nathan, Kevin wrote:
>Hi All,
>
>I am still working on getting something that works well over the entire 160
>meter band.  I have a design in mind but, being blind, can't use EZNEC to
>model it.  So, would one of you gurus on here please model the following for
>me if you have the time and let me know what you find.  Please send private
>replies to this address and cc to k7rx@attbi.com.
>
>I have in mind to build a folded Marconi.  Let's start with 130 feet of 450
>ohm windowed ladder line.  Short one end together and call this the
>insulator end.  Now, let's put this up as an inverted L with about 45 feet
>of it vertical and the rest horizontal sloping to approximately 20 feet at
>the end.  At ground level, feed one side with the coax center conductor and
>the other side with the shield.  Attach at least one above ground, quarter
>wave counterpoise to this shield connection.  I would like to see what kind
>of characteristics this antenna would exhibit.  Next, using more classic
>design, let's come back 7.5 feet from the insulator end (in other words,
>123.5 feet out from the feed point) and short the line together thus leaving
>the equivalent of a single wire for the remaining 7.5 physical feet.  Does
>this change the characteristics of the antenna greatly?
>
>I would really appreciate any information anyone could give me as to how
>this models.  I have used similar antennas in the past made from 300 ohm
>twin lead but not ladder line.
>
>Thanks in advance for your help.  73
>Kevin, K7RX