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References: [ +subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*\[TowerTalk\]\s+dipole\s+z\s+vs\s+height\s*$/: 8 ]

Total 8 documents matching your query.

1. [TowerTalk] dipole z vs height (score: 1)
Author: Jim Lux <jimlux@earthlink.net>
Date: Wed, 20 Feb 2013 07:18:26 -0800
Starting new thread.. It will have an effect, but I don't know about a huge one. Here's some sample data from a dipole at 3.68 MHz, with legs 19.646m long, copper wire. Two soil conditions 14/.005, 5
/archives//html/Towertalk/2013-02/msg00292.html (8,749 bytes)

2. Re: [TowerTalk] dipole z vs height (score: 1)
Author: Dan Maguire <djm2150@yahoo.com>
Date: Wed, 20 Feb 2013 09:47:56 -0800 (PST)
I'm a "visual" type guy, so I modeled Jim's 80m dipole at heights above ground from 10 to 30 meters using three different soil conditions. Here's the picture-worth-a-thousand-words: http://ac6la.com/
/archives//html/Towertalk/2013-02/msg00293.html (7,282 bytes)

3. Re: [TowerTalk] dipole z vs height (score: 1)
Author: Jim Brown <jim@audiosystemsgroup.com>
Date: Wed, 20 Feb 2013 10:19:38 -0800
It will have an effect, but I don't know about a huge one. I've done a lot of modeling, both with NEC and with SimSmith to study the effects of voth antenna height and transmission lines of different
/archives//html/Towertalk/2013-02/msg00294.html (9,476 bytes)

4. Re: [TowerTalk] dipole z vs height (score: 1)
Author: Al Kozakiewicz <akozak@hourglass.com>
Date: Wed, 20 Feb 2013 13:54:55 -0500
For those who don't want to do any modeling and aren't looking for a high degree of precision w/r/t ground conductivity, I've always found the charts and figures that accompany this article very usef
/archives//html/Towertalk/2013-02/msg00295.html (8,931 bytes)

5. Re: [TowerTalk] dipole z vs height (score: 1)
Author: K8RI <K8RI-on-TowerTalk@tm.net>
Date: Wed, 20 Feb 2013 17:01:56 -0500
If you'd like to play with variations on this yourself, contact me off-list and I'll send you the ".weq" model file for use with AutoEZ. Dan, AC6LA http://ac6la.com/ Here's some sample data from a di
/archives//html/Towertalk/2013-02/msg00296.html (9,130 bytes)

6. Re: [TowerTalk] dipole z vs height (score: 1)
Author: "David J. Sourdis - HK1A" <hk1kxa@hotmail.com>
Date: Wed, 20 Feb 2013 20:29:30 -0500
Interesting. Is the take off angle the same for all three grounds when simulated at certain height? David HK1A EC5KXA AE5XQ _______________________________________________ ___________________________
/archives//html/Towertalk/2013-02/msg00297.html (10,658 bytes)

7. Re: [TowerTalk] dipole z vs height (score: 1)
Author: Jim Brown <jim@audiosystemsgroup.com>
Date: Wed, 20 Feb 2013 17:48:15 -0800
"Take-off angle" is normally used to describe the peak of the vertical pattern, but that pattern is broad. In general, better ground conductivity increases the strength of the pattern at lower angles
/archives//html/Towertalk/2013-02/msg00298.html (8,293 bytes)

8. Re: [TowerTalk] dipole z vs height (score: 1)
Author: Jim Lux <jimlux@earthlink.net>
Date: Wed, 20 Feb 2013 19:43:16 -0800
Interesting. Is the take off angle the same for all three grounds when simulated at certain height? Yes, with very, very small differences.. for horizontal polarization, the phase shift on the reflec
/archives//html/Towertalk/2013-02/msg00299.html (8,186 bytes)


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