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[TowerTalk] tower height increse.

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Subject: [TowerTalk] tower height increse.
From: (Pete Smith)
Date: Sun May 11 20:57:01 2003
At 03:12 PM 5/11/03 +0000, Robert Peterson - W3YY wrote:
>Sounds like Pete is very much aware of the terrain issue and has also either
>developed tools or found existing ones to do the analysis.

Good heavens -- no invention claims here.  I am a beta tester for HFTA (HF 
Terrain Analysis) by Dean Straw, N6BV.  It will come bundled with the 20th 
edition of the ARRL Antenna Book, to be released this fall.  HFTA is the 
Windows evolution of YT, which Dean developed and which was bundled with 
the last previous editions of the Antenna Book.  HFTA computes a figure of 
merit (weighted average gain) for each antenna setup and terrain profile; 
those are the numbers I was quoting to quantify the effect of changes in 
height.  I'm sure I'm not the first person to think of it, but my article 
on "Scoring Your Antenna system" in NCJ a couple of years ago (Jan/Feb 
2001, corrections in Sept/Oct) seems to have been the first ham publication 
describing this technique.

That's not important -- what IS important is that Dean has done the work to 
collect the statistical arrival angle data and write a really nice piece of 
With Dean's blessing, I'm giving a talk featuring HFTA and other 
innovative, low-cost modeling software for hams at the Dayton Hamvention's 
Antenna Forum next weekend.  See you there?

73, Pete N4ZR
The World HF Contest Station Database was updated 9 May 03.
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