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 s
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
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 is
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 7:1
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. Tre
(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,
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 t
On 08/09/2013 04:51 PM, Charlie Cunningham wrote:
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.
No receive antennas? With 1500 watts into a 100 foot vertical (tower
with 7 elem
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
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
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
To: Raoul Coetzee
Cc: "topband@contesting.com"
Sent: Friday, August 9, 2013 10:59 AM
Subject: Re: Topband: Tree Condu
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 wrote:
>
> I am well aware that I may be flamed (again) for starting "something", but
> I found t
Very nice study and IMO neither small nor inelegant. Thanks
From: Roger Parsons
To: Topband
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' vertical, and it showed a gain of about 1
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 r
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