I share your opinions and sentiments, Greg! Over the years I've worked some
pretty good stuff around the world on 160 with inverted- Ls held up by
trees, running a bit less power than you - abt 500-600W out from a home-brew
3-500Z.
73,
Charlie, K4OTV
-Original Message-
From: Topband [mail
> For them to make a significant impact on my ability to transmit, they would
> have to absorb at least 3db (750 watts).
So your loss is less than 3 db, and so it's of no concern to you?
I know 160 meter ops who would, and do, pay lots of money for an extra 3 db.
Say your tree loss was really
Just thinking here - I can hold my hand on a 75 watt lightbulb for a few
seconds. 10 of those lightbulbs-worth of heat isn't very much heat,
dissipated over the surface area of the bark of a tree, 60 feet tall, in
winter, with low temps, and maybe even some wind can't really have much in
t
Different folks here have promulgated a "high voltage point loss" model for
antennas in trees. I think this could be a valid model for a doublet hung with
wires directly touching wet tree branches, I'm sure at high enough power level
this could burn away some of the tree probably at a high volta
When I was a teenager chasing Gus Browning on 40 meters I caught a tree on fire
at night because the end of my dipole was in some dead tree branches!
My parents were not happy...
73
Frank
W3LPL
- Original Message -
From: "Tim Shoppa"
To: "Tom W8JI" , "Rick Stealey" ,
topband@co
On 8/8/2013 10:09 AM, donov...@starpower.net wrote:
I caught a tree on fire at night because the end of my dipole was in some dead
tree branches!
One of the first antennas I hung when I moved here was a horizontal
dipole for 80 with loading coils for 160M, built with THHN. One end was
touchi
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 1.7dBi over a
particular ground.
Keeping everything else the same, I introduced a 'tree' 3ft away from it, with
no branches, exactly parallel, also 128' high and initiall
