[TowerTalk] Has anyone ever put up a V-beam?

[Rick Stealey]

I can't imagine building a model, other than a very simple one, without using variables.
In 4NEC2 I can change one variable (like height) and every element of a multielement yagi goes to that height.


Rick  K2XT

> Date: Thu, 17 Sep 2015 18:48:57 -0700
> To: towertalk at contesting.com
> Subject: Re: [TowerTalk] Has anyone every put up a V-beam?
> From: towertalk at contesting.com
> 
> Rick wrote:
> >>> 4NEC2 files have a .nec extension.  So if EZNEC can import them you would be ok.
> 
> Well, not quite.  Yes, 4nec2 files have a .nec extension but they typically do not follow standard NEC conventions.  For example, Paul's posted file contains these lines:
> 
> SY len = 350	'Element Length
> SY ang = 67	'Included Angle
> SY hgt = 80	'Height AGL
> SY x = len*sin(ang/2), y = len*cos(ang/2)	'Cartesian Angle Computation
> GW	1	40	-x	y	hgt	-1	0	hgt	#14
> 
> "SY" is not a standard NEC card type and "GW" cards using non-numeric fields are not standard.  So EZNEC treats this .nec file as having an invalid format.
> 
> >>> The other way around works (4NEC2 imports .EZ files).
> 
> That also has a caution to it.  4nec2 will import simple .ez files but will not recognize some of the things found in newer .ez files such as wire insulation specs, transformers (baluns), or L-networks.
> 
> Dan, AC6LA
> 
> 
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