[TowerTalk] 3000' feedline...can I make it work?

[W7TMT]

Paul,

For additional information you might find W4RNL's article
titled "Some (Old) Notes on Home-Brew Parallel Transmission"
worth your time. 

His excellent home page is located here:
http://www.cebik.com/radio.html

The article on parallel line theory, formulas and
construction hints is here: 
http://www.cebik.com/par.html 

73 
Patrick 
W7TMT
 

-----Original Message-----
From: towertalk-bounces at contesting.com
[mailto:towertalk-bounces at contesting.com] On Behalf Of on4kj
Sent: Friday, April 30, 2004 18:44 PM
To: Paul; towertalk at contesting.com
Subject: Re: [TowerTalk] 3000' feedline...can I make it
work?

  Paul,

  Use this formula to calculate your open 600 ohm Lecher
line as a function of wire gauge and distance. Keep the line
away from ground, otherwise you must introduce other factors
as hight and the formulae has some more complexity Zc (600)=
276Log( 2D/d)
  where D is  the distance between the wires.
             d wire gauge expessed in the same unit as the
Distance.

  On each end you have to use a impedance transformer 1/12
unbalanced to balanced.
  Some one else can tell you wich type of core to use,
number of turns depends upon the type of core.
  If this is not correct one would correct me please. Did
not use these formulae for quite a number of years.

  Jos on4kj