Thanks Jim. I’ll look at your pdf’s. Actually I would like to learn EZNEC, but
for now I’m looking at two similar antennas. Both would be 210 ft , center fed
with ladder line to a balun then ~25 ft of LMR400 to a Ten-Tec 238 tuner. One
antenna uses any convenient length, (min 40 ft) of 450 ohm Ladder line to a 4:1
balun. The other is the DX Engineering DXE-WA-260 160-10 Meters Multi- Band
Dipole kit. They recommend using 60.1ft, or odd multiple there of, of 300ohm
ladder line to a 1:1 balun. I know both will be NVIS, I’m just trying to
determine which would be the better choice.
Sent from my iPad
> On Jul 11, 2018, at 2:12 PM, Jim Brown <jim@audiosystemsgroup.com> wrote:
>
>> On 7/11/2018 10:52 AM, Bruce Jungwirth wrote:
>> I’m looking for someone in or around St Paul Mn that is fluent in EZNEC.
>
> A principal value of EZNEC and other modeling software is as a teaching tool,
> and you only learn from it when YOU do it. It's not all that difficult to
> learn once you get over the fear factor. The free version that comes with the
> ARRL Antenna Book will model simple antennas like you're thinking about.
>
> Here are several studies I've done to help think about problems like yours.
>
> http://k9yc.com/VertOrHorizontal-Slides.pdf
>
> http://k9yc.com/VerticalHeight.pdf
>
> http://k9yc.com/43FtVertical.pdf
>
> http://k9yc.com/AntennaPlanning.pdf
>
> I am a big fan of fan dipoles. A good rule is to not try to put more than
> three elements in the fan. 80/40 makes a good fan, so does 20/15/10.
> Although I haven't done it, i suspect that 30/17 would too.
>
> 73, Jim K9YC
>
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