[TowerTalk] Trees and Verticals

[Gary Schafer]

It may well act as a transmission line coupling energy to the inside of the
(tube) cage as the top of the tree sticks out of the tube.

73
Gary  K4FMX

> -----Original Message-----
> From: towertalk-bounces at contesting.com [mailto:towertalk-
> bounces at contesting.com] On Behalf Of K8RI
> Sent: Wednesday, December 28, 2011 8:02 PM
> To: towertalk at contesting.com
> Subject: Re: [TowerTalk] Trees and Verticals
> 
> On 12/28/2011 7:32 PM, David Gilbert wrote:
> > Well, I can say with pretty good assurance that a wooden pole, wet or
> > dry, doesn't affect the currents flowing through a surrounding
> aluminum
> > tube.  The currents in the aluminum tube flow on the outside of it.
> 
> I would think the tree on the inside would act like a leaky capacitor to
> ground.
> 
> 73
> 
> Roger (K8RI)
> >
> > Whether or not a tree surrounded by a cage of wires an appreciable
> > portion of a wavelength long behaves the same way depends, I guess,
> upon
> > how well the cage of wires actually approximates a tube.  Why don't
> you
> > model it as Jim Lux suggested and let us know?  If it acts like a tube
> > it would likely be pretty efficient in spite of what I stated earlier.
> >
> > Dave   AB7E
> >
> >
> >
> >
> > On 12/28/2011 2:14 PM, Dan Schaaf wrote:
> >> 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"<xdavid at cis-broadband.com>
> >> To:<towertalk at contesting.com>
> >> Sent: Wednesday, December 28, 2011 4:05 PM
> >> Subject: Re: [TowerTalk] Trees and Verticals
> >>
> >>
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