Duane wrote:
>>> Do you know if 4Nec2 files be imported into Eznec?
No. But ...
For AutoEZ users, here is a V-Beam model I created a while ago.
http://ac6la.com/adhoc/V-Beam.weq
It is similar to the one that Paul posted on his QRZ page in that variables are
used to control the leg length, apex height, and apex angle, so you can quickly
configure it to your desired dimensions. In addition, this one lets you
control the height at the ends of the legs so you can make it a "sloping
V-beam" if desired. The model also includes an arbitrary length of
parallel-conductor transmission line along with a 4:1 balun at the station end
of the line so you can see what impedance your tuner would have to handle on
various bands.
If you are not an AutoEZ user but you do have Microsoft Excel (not an Excel
clone) you are welcome to use the free demo version of AutoEZ to convert the
above .weq format model to .ez format.
AutoEZ info and demo download: http://ac6la.com/autoez.html
AutoEZ can also read 4nec2 files, so you could use it to read Paul's file and
then convert that one to .ez format as well. Note that .ez format does not
support use of variables so when you convert .weq to .ez or convert .nec
(4nec2) to .ez the model dimensions are "frozen" at whatever the current
settings are in the original.
ARRL members who have access to back issues of QST might want to check out an
article titled “A Four Wire Steerable V Beam for 10 through 40 meters” by Sam
Moore, NX5Z, in the March 2011 QST. The above model was built as I was reading
that article. Also, V-Beams are discussed in Chapter 13 of recent editions of
the ARRL Antenna Book and the CD that is bundled with the book has three sample
V-Beam models in .ez format.
Dan, AC6LA
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