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

[Dan Maguire]

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