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Old September 18th 04, 11:25 AM
Thierry
 
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"Mark Keith" wrote in message
om...
"Thierry" http://www.astrosurf.com/lombry wrote in message

...
Ok Mark, for sure for DXing a dipole or a windom is not a beam...


I'd rather have the coax fed dipole over the windom any day though...I

Hi,

No. For a true dipole and get a low impedance etc I prefer by far the ladder
line; The coax is easier but is less performing
This is not much difference, but measurable. I always prefered the optimum
solution.

bet many people would think it's a beam , the way it will most likely
trounce the average windom.
I tried one "windom" at a field day against a coax fed dipole. The
dipole won by 2 s units in any direction. Thats about what you would
see going from a coax dipole to an average beam...:/ Or by changing
from 100w to 500w-1 KW...


Ok. I will see but 2 S-unit are much. What is sure is that the radiation
pattern of a carolina windom is next over a dipole :
http://www.astrosurf.com/lombry/Radi...on-pattern.gif
it is much more omnidorectionnal what could explain is overall better
performance.



My objective is Dxing first as for local QSOs this is not a problem to

get
S9+.


If it's working local, why would it not be working dx ok? Why the
change to an antenna which basically will be the same, assuming


Local is not DX. High takeoff angle vs. very low. This is a huge difference
if you check your receive strength signal.

73
Thierry, ON4SKY

element lengths are fairly close for a given band, barring any changes
in feedline efficiency? IE: I assume you are going to switch from a
G5RV to a windom....
Thinking about either one of those antennas makes me want to take up
golf...
I don't like either one. It's no secret though....
The only thing the G5RV has going for it, is it is nearly a EDZ on
20m. But it's a reduced efficiency version compared to one fed in a
normal manner...
Coax to a choke to ladder line as a feedline is no way to live for a
serious dx'er who wants most of his power to actually be radiated by
the antenna element...The windom is not much better in this
regard....Or at least the ones I've seen.

I know very well that DX performances will be more than limited, all the
more in SSB, but this is a temporary solution waiting for a small beam

3-or
4 ele.


You still don't mention which band/s though... There are fairly simple
wire antennas much better for dx than the usual all band compromise
wire antenna. IE: extended double zepps, phased parallel dipoles, etc,
etc. I would use something along those lines if I wanted to dx say 20m
or up...If you want to dx 80/40, you might consider a bobtail curtain
or variant, or a good vertical. Trying to increase the dx potential by
changing from one semi lame antenna , to another semi lame antenna
strikes me as counterproductive. But, it's your yard and $$$.... :/
MK