[WVDXA] HFTA

[Pstark]

Solution is to use crank up tower.
Adjust to best signal.
Work dx.

When we getting started on tower, Charlie?

Pete K4OM
  -----Original Message-----
  From: wvdxa-bounces at wvdxa.org [mailto:wvdxa-bounces at wvdxa.org]On Behalf Of
Charlie Young
  Sent: Friday, July 04, 2008 9:44 PM
  To: wvdxa at wvdxa.org
  Subject: [WVDXA] HFTA


  For those who might not be familiar with HFTA (High Frequency Terrain
Analysis) software that comes bundled with the latest ARRL Antenna Book,
here is a presentation the author N6BV did for the YCCC
  which describes how terrain affects the vertical takeoff angle in
surroundings like we live in.

  http://www.yccc.org/Articles/N6BV/N6BV%20Boxboro%202004.ppt#394,1,

  I have been playing with this now for about a year and using it to plan my
antenna installation.  My terrain has some of the saddleback features
mentioned  (undesirable) in some directions.  Not much one can do about
that.  The primary usefulness, if one lives on the side of a hill or on top
of the hill, is the software can give some guidance regarding how high to
put the antenna above ground. It is very easy, especially on 15 and 10
meters, to be too high if the ground slope is steep.  For example, HFTA says
that on 15 and 10 meters, a single yagi higher than 25' or so will be
decidedly inferior than one even 40 or 50' high toward EU at my QTH.

  I wish HFTA would do verticals, but it will only do horizontal antennas.

  73, Charlie N8RR


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