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

[on4kj]

  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

  ----- Original Message ----- 
  From: "Paul" <radioboy at telus.net>
  To: <towertalk at contesting.com>
  Sent: Saturday, May 01, 2004 1:23 AM
  Subject: [TowerTalk] 3000' feedline...can I make it work?


  > Hi guys,
  >
  > I have just bought a farm, and have need to run about 3000' of feedline
to
  > get the antennas up to the top of the mountain in back of our property.
I
  > would like to put up a full wave 160M loop, maybe a wire Log periodic,
and
  > some other wire antennas up there but I need to run feedline from the
shack
  > at the bottom of the hill.
  >
  > I know I must use some form of balanced open wire feedline but the
question
  > is, can 3000' work and if so, what spacing, wire size etc. should I be
  > using? Just HF, and mainly 160 - 40M.  I have miles of #6 aluminum wire,
  > which I would like to use but don't know how it will perform with RF. It
is
  > old stranded high voltage transmission wire, with black plastic
insulation,
  > single conductor, nice continuous lengths.
  >
  > Your thoughts?
  >
  > Thanks!
  >
  > Paul
  > VE7KHz
  >
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