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References: [ +subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*\[TowerTalk\]\s+Trees\s+and\s+Verticals\s*$/: 77 ]

Total 77 documents matching your query.

1. [TowerTalk] trees and verticals (score: 1)
Author: kr2q@optimum.net
Date: Tue, 27 Dec 2011 15:53:20 +0000 (GMT)
My FYI tale of vertically polarized antennas and trees. I have always lived in very heavily wooded areas and have always used horizontally polarized antennas on the top of crankup towers. They clear
/archives//html/Towertalk/2011-12/msg00670.html (8,215 bytes)

2. Re: [TowerTalk] trees and verticals (score: 1)
Author: Eddy Swynar <deswynar@xplornet.ca>
Date: Tue, 27 Dec 2011 11:04:22 -0500
Hi Guys, I guess I'm just plain stupid or something, I don't know... ...But whenever someone tells me that a tree is death to the radiation emitted from a nearby vertical antenna, I immediately ask m
/archives//html/Towertalk/2011-12/msg00671.html (8,090 bytes)

3. Re: [TowerTalk] trees and verticals (score: 1)
Author: N6FD <n6fd@hughes.net>
Date: Tue, 27 Dec 2011 08:55:29 -0800
Trees are absorbtive, metal is reflective. At least with the metal, your signal goes somewhere. _______________________________________________ _______________________________________________ TowerTa
/archives//html/Towertalk/2011-12/msg00673.html (8,505 bytes)

4. Re: [TowerTalk] trees and verticals (score: 1)
Author: "David Jordan" <wa3gin@comcast.net>
Date: Tue, 27 Dec 2011 12:10:45 -0500
I run a cage vertical on 40m in the middle of the woods, no problem. I run an 8 element 40m Jamaca antenna and a 4 element 80m Jamaca in the same woods, no problem. Perhaps as one fella said the conc
/archives//html/Towertalk/2011-12/msg00674.html (9,024 bytes)

5. Re: [TowerTalk] trees and verticals (score: 1)
Author: Jim Brown <jim@audiosystemsgroup.com>
Date: Tue, 27 Dec 2011 09:32:56 -0800
My last paragraph attempted to do that. But antennas and radio are far to complex to describe their behavior in 25 words or less. One must struggle to get one's mind around the laws of physics. We ca
/archives//html/Towertalk/2011-12/msg00675.html (9,766 bytes)

6. Re: [TowerTalk] trees and verticals (score: 1)
Author: Jim Brown <jim@audiosystemsgroup.com>
Date: Tue, 27 Dec 2011 09:47:42 -0800
Absolutely. My rule is simple -- do the best you can, then get on the air and have fun with it. And, when I'm not on the air, I'm still thinking about how I can improve my station and antenna farm. F
/archives//html/Towertalk/2011-12/msg00677.html (8,986 bytes)

7. Re: [TowerTalk] trees and verticals (score: 1)
Author: "Mike Ryan" <mryan001@tampabay.rr.com>
Date: Tue, 27 Dec 2011 13:22:09 -0500
Rather than have to guy wire one of my two verticals at my qth, I stood one up within the branches of a 20ft or so tall tree in front of my house. It helps disguise it as well. It is an HF2V that kic
/archives//html/Towertalk/2011-12/msg00680.html (10,408 bytes)

8. Re: [TowerTalk] trees and verticals (score: 1)
Author: Rik van Riel <riel@surriel.com>
Date: Tue, 27 Dec 2011 13:53:51 -0500
Some people apparently have noticed a lot of difference. However, in this thread the person who noticed the most difference, also had the tallest & widest trees... I imagine a wider tree not only cap
/archives//html/Towertalk/2011-12/msg00683.html (8,811 bytes)

9. Re: [TowerTalk] trees and verticals (score: 1)
Author: Jim Lux <jimlux@earthlink.net>
Date: Tue, 27 Dec 2011 11:22:25 -0800
there is a fair amount of literature on absorption/propagation in forests. Googling with the right search terms finds a lot of it. Most of the HF data was acquired back in the 60s in connection with
/archives//html/Towertalk/2011-12/msg00684.html (10,461 bytes)

10. Re: [TowerTalk] trees and verticals (score: 1)
Author: K8RI <K8RI-on-TowerTalk@tm.net>
Date: Tue, 27 Dec 2011 15:17:59 -0500
Don't forget the conductivity of deciduous trees changes dramatically from winter to spring. It's *probably* highest in early spring than it is in summer for HF and the sap flow is highest in early s
/archives//html/Towertalk/2011-12/msg00687.html (9,519 bytes)

11. Re: [TowerTalk] trees and verticals (score: 1)
Author: Eddy Swynar <deswynar@xplornet.ca>
Date: Tue, 27 Dec 2011 15:35:08 -0500
Hi Eric, Now THAT'S what I find to be so contradictory & confusing in all this... How can metal possibly be reflective, vis-a-vis a tree, in a similar situation...? The metal is grounded, and conduct
/archives//html/Towertalk/2011-12/msg00688.html (9,720 bytes)

12. Re: [TowerTalk] trees and verticals (score: 1)
Author: N6FD <n6fd@hughes.net>
Date: Tue, 27 Dec 2011 13:17:36 -0800
Eddy, Think about the metal as being part of an antenna system. A yagi has the reflector often shorted to the boom and driven element. The metal reflects or redirects the signal with minor losses. Th
/archives//html/Towertalk/2011-12/msg00691.html (12,070 bytes)

13. Re: [TowerTalk] trees and verticals (score: 1)
Author: Jim Lux <jimlux@earthlink.net>
Date: Tue, 27 Dec 2011 13:27:50 -0800
You're almost certainly correct. They've done work with trees in an anechoic chamber where they measured them with leaves, and after removing the leaves, and on live/dead trees, etc. There is huge in
/archives//html/Towertalk/2011-12/msg00692.html (11,957 bytes)

14. Re: [TowerTalk] trees and verticals (score: 1)
Author: David Gilbert <xdavid@cis-broadband.com>
Date: Tue, 27 Dec 2011 14:30:51 -0700
Metal re-radiates whatever it RF absorbs, assuming no ohmic losses. Think about how a yagi reflector or director works. In the case of random metal you will get random re-radiation, but the RF goes s
/archives//html/Towertalk/2011-12/msg00693.html (13,011 bytes)

15. Re: [TowerTalk] trees and verticals (score: 1)
Author: "David Thompson" <thompson@mindspring.com>
Date: Tue, 27 Dec 2011 17:17:02 -0500
I hear all the horror stories of verticals or inverted L's next to a tree but have to agree with Eddy, VE3CUI, VE3XZ. A tree should be better than a metal pole or tower. I have a diagram of the K8UR/
/archives//html/Towertalk/2011-12/msg00696.html (9,721 bytes)

16. Re: [TowerTalk] trees and verticals (score: 1)
Author: "Stan Labinsky Jr." <wa2puq@frontiernet.net>
Date: Tue, 27 Dec 2011 17:43:11 -0500
Question... doesn't the size of the of the mentioned piece (or pieces) of metal play a significant role in its re-radiating? IIRC there is a resonance issue at work here too. Grounding of that metal?
/archives//html/Towertalk/2011-12/msg00698.html (15,041 bytes)

17. Re: [TowerTalk] trees and verticals (score: 1)
Author: Eddy Swynar <deswynar@xplornet.ca>
Date: Tue, 27 Dec 2011 18:03:51 -0500
Hi Eric, I'm going to play "devil's advocate" here, & try to put my "spin" onto what you've just stated above...! : >) QUESTION #1: you've stated earlier that trees are very lossy affairs, & because
/archives//html/Towertalk/2011-12/msg00699.html (11,001 bytes)

18. Re: [TowerTalk] trees and verticals (score: 1)
Author: kr2q@optimum.net
Date: Tue, 27 Dec 2011 23:04:49 +0000 (GMT)
Hi Eddy,I have no clue.  My educational background is in Biology (ugrad) and Veterinary Medicine (doctoral).  I currently (and for the past 15 years) am working in healthcare (hospital administration
/archives//html/Towertalk/2011-12/msg00700.html (10,191 bytes)

19. Re: [TowerTalk] trees and verticals (score: 1)
Author: K8RI <K8RI-on-TowerTalk@tm.net>
Date: Tue, 27 Dec 2011 18:18:21 -0500
They are different situations. Metal can absorb and reradiate as in directors and reflectors Grounding may or may not make a huge difference depending on the length of the metal. I once worked a stat
/archives//html/Towertalk/2011-12/msg00701.html (12,873 bytes)

20. Re: [TowerTalk] trees and verticals (score: 1)
Author: <john@kk9a.com>
Date: Tue, 27 Dec 2011 15:55:07 -0800
A vertical is not a great antenna on 40m, unless of course you have the base in salt water. I just did a quick model of my lower shortened 2el 40m beam which is at 75 feet and a vertical that I had a
/archives//html/Towertalk/2011-12/msg00703.html (9,970 bytes)


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