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## Re: [TowerTalk] Trees and Verticals

 To: "David Gilbert" , Re: [TowerTalk] Trees and Verticals "Dan Schaaf" Wed, 28 Dec 2011 16:14:19 -0500 mailto:towertalk@contesting.com>
 Let's go a step further, What happens if you put a dry wooden broomstick down the center of an aluminum tube vertical. Then a wet Broomstick. Best Regards Dan Schaaf K3ZXL www.k3zxl.com "Problems cannot be solved by the same level of thinking that created them." - Albert Einstein ----- Original Message ----- From: "David Gilbert" To: Sent: Wednesday, December 28, 2011 4:05 PM Subject: Re: [TowerTalk] Trees and Verticals > > That would be an interesting configuration to model in the manner that > Jim Lux suggested (using a set of resistive wires to simulate the tree), > but I'm pretty sure that the losses would be significant if the tree > itself was indeed lossy. Normally the fields inside a closed structure > are minimal, but that's because (unless I am mistaken ... which is > entirely possible) the E-fields generated by current through the various > wires/surfaces repel each other. If you put a lossy medium in the > middle they get absorbed before they repel each other. > > I'm guessing that would be the second worst way to use a tree as far as > efficiency is concerned. The worst would probably be to bore a long > hole down the center of the trunk and run the wire through it. > Stealthy, yes ... efficient, no. > > 73, > Dave AB7E > > > > On 12/28/2011 1:41 PM, Dan Schaaf wrote: >> What happens if you make the vertical as a cage of vertical wires around >> the tree ? Joined at the top and joined and fed at the bottom. The tree >> is in the center of the cage. >> >> Cage wire antennas seem to have a broad bandwidth. But what happens to >> the tree losses when the tree is caged ? >> >> >> Best Regards >> Dan Schaaf >> K3ZXL www.k3zxl.com > _______________________________________________ > > > > _______________________________________________ > TowerTalk mailing list > TowerTalk@contesting.com > http://lists.contesting.com/mailman/listinfo/towertalk _______________________________________________ _______________________________________________ TowerTalk mailing list TowerTalk@contesting.com http://lists.contesting.com/mailman/listinfo/towertalk
 Current Thread Re: [TowerTalk] trees and verticals, (continued) Re: [TowerTalk] trees and verticals, Roger Parsons Re: [TowerTalk] trees and verticals, Frank Re: [TowerTalk] trees and verticals, David Gilbert Re: [TowerTalk] trees and verticals, Jim Lux Re: [TowerTalk] trees and verticals, David Gilbert Re: [TowerTalk] trees and verticals, Jim Lux Re: [TowerTalk] trees and verticals, David Gilbert Re: [TowerTalk] trees and verticals, Jim Lux [TowerTalk] Trees and Verticals, Dan Schaaf Re: [TowerTalk] Trees and Verticals, David Gilbert Re: [TowerTalk] Trees and Verticals, Dan Schaaf <= Re: [TowerTalk] Trees and Verticals, Gary Schafer Re: [TowerTalk] Trees and Verticals, Stan Labinsky Jr. Re: [TowerTalk] Trees and Verticals, Jim Lux Re: [TowerTalk] Trees and Verticals, Jim Brown Re: [TowerTalk] Trees and Verticals, Jim Lux Re: [TowerTalk] Trees and Verticals, Jim Brown Re: [TowerTalk] Trees and Verticals, K8RI Re: [TowerTalk] Trees and Verticals, K1TTT Re: [TowerTalk] Trees and Verticals, David Gilbert Re: [TowerTalk] Trees and Verticals, K8RI