I am well aware that I may be flamed (again) for starting something, but
I found this article where the conductivity of sap wood and hard wood is
measured.
It seems if I read it correctly, that with this specific trees and soil
conditions,
the results are
quote:and 594 ± 55.5
the heartwood
Very nice study and IMO neither small nor inelegant. Thanks
From: Roger Parsons ve...@yahoo.com
To: Topband topband@contesting.com
Sent: Friday, August 9, 2013 7:29 AM
Subject: Re: Topband: Tree losses
I just did a small and inelegant piece of modelling with EZNEC.
I took a wire 128'
So when the Suns magnetic field reverses and the sap starts flowing in the
opposite direction will that affect the conductivity any?
Sent from my iPhone
On Aug 9, 2013, at 8:29 AM, Raoul Coetzee raoulcoet...@yahoo.com wrote:
I am well aware that I may be flamed (again) for starting
I guess then I will have to reposition my plastic owl to face true South.
Gee, I wish band conditions were better!
73, Stew K3ND
- Forwarded Message -
From: W2PM w...@aol.com
To: Raoul Coetzee raoulcoet...@yahoo.com
Cc: topband@contesting.com topband@contesting.com
Sent: Friday,
I expect the losses are related to current not voltage. The current of my
antenna is in the vertical section for the most part and loss would would have
to happen there as coupled to the nearest tree. The current would have to flow
to ground so I seriously doubt if the resistance of the trunk
You're a man after my own heart, Greg! I never worried so much about the
Dbs. As a DXer, I generally listened a lot, and I found that on 160, if I
could hear them - more often than not, I could work 'em - wherever in the
world they might be.
Aside from 160, I have also built fearsome 3-el 40m
Yes that's a good IDIA but my main concern will be How do I find True SOUTH
Wayne w3EA
Date: Fri, 9 Aug 2013 09:21:45 -0700
From: k...@yahoo.com
To: topband@contesting.com
Subject: Topband: Fw: Tree Conductivity
I guess then I will have to reposition my plastic owl to face true
(1 slight change made with apologies to Joyce Kilmer)
Jim / W1FMR
Joyce Kilmer. 1886–1918
119. Trees
I THINK that I shall never see
A tower lovely as a tree.
A tree whose hungry mouth is prest
Against the sweet earth's flowing breast;
A tree that looks at God all day,
Hope you don’t mind my use of artistic license
Cecil Acuff
Gulfport MS
K5DL
From: Jim F.
Sent: August 9, 2013 6:06 PM
To: top Band
Subject: Topband: Condo Owners 160m poem.
(1 slight change made with apologies to Joyce Kilmer)
Jim / W1FMR
Joyce Kilmer. 1886–1918
119.
Sunset and evening star, And one clear call for me!
With apologies to Alfred Lord Tennyson - From Crossing the Bar
73/DX
Charlie, K4OTV
-Original Message-
From: Topband [mailto:topband-boun...@contesting.com] On Behalf Of
chac...@cableone.net
Sent: Friday, August 09, 2013 7:16
I expect the losses are related to current not voltage. The current of my
antenna is in the vertical section for the most part and loss would would
have to happen there as coupled to the nearest tree. The current would have
to flow to ground so I seriously doubt if the resistance of the trunk
Where are the high voltage points in a T antenna?
I have the choice of putting up either a new T between two trees, or an L again
on 160M. The ends of the T would by necessity be strung over and go down 20-30'
alongside the two supporting trees.
The L would parallel a tree and bend over at
On 8/9/2013 9:31 PM, Gary and Kathleen Pearse wrote:
Where are the high voltage points in a T antenna?
The end of an antenna (for example, at the end insulator of a wire
antenna) MUST be a current minimum (near zero) because there is no place
for it to go except by capacitance to space or
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