Thanks Paul!
Do you know if 4Nec2 files be imported into Eznec?
On Thu, Sep 17, 2015, at 04:41 AM, Paul Christensen wrote:
> If anyone has an interest in modeling the V-Beam, I have placed a 4Nec2
> input file at the top of my QRZ.com page. The Cartesian angle
> computation
> allows for changing the included angle and leg length. Probably the
> easiest
> way to save the file is to right-click on the link, then "Save Target As"
> to
> your desktop.
>
> To modify the file in 4Nec2, click on the main menu EDIT tab, then INPUT.
> When the input menu opens, select the "Symbols" tab. Here, one can
> easily
> adjust the antenna to any height, included angle, and leg length. The
> default file has a 67 deg. angle and 350 ft. legs at 80 ft AGL, normal
> soil.
> On 40m and 20m, be prepared to see an extraordinary result for a wire
> antenna. As others have pointed out, quite a bit of land is needed
> along
> with three high supports to get this level of performance.
>
> https://www.qrz.com/db/W9AC
>
> I'll leave the file up for a few days.
>
> Paul, W9AC
>
> -----Original Message-----
> From: Patrick Greenlee
> Sent: Thursday, September 17, 2015 7:15 AM
> To: towertalk@contesting.com
> Subject: Re: [TowerTalk] Has anyone every put up a V-beam?
>
> Aluminum coated steel wire is commonly used for electric fences.
> Although proper practice is to install it with low tension (as per
> vendor and MFG) that is not because of any failing in the wire's
> strength or resilience. It can take significant tension and last a good
> long time. One issue is the skin effect. Your lowest frequency of
> interest will penetrate into the wire to the greatest depth. You will
> get better performance if your skin depth does not exceed the thickness
> of the aluminum outer layer. I cant quote the formula for skin depth
> from memory but it is readily available.
>
> There has been a lot of this aluminum coated steel wire used for
> antennas with good success.
>
> Patrick NJ5G
> /listinfo/towertalk
>
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