Jim it's to bad all those smart guys didn't read the last sentence of the
original posting. The saltwater is not a factor in this equation,,, it's the
FT5XO callsign that made the antennas look like they were doing well. Trying
to make antenna judgments and saltwater effect when your call is FT5XO is
just pure silliness. If those guys want to make real/meaningful saltwater
tests go about 400 miles North of me to the Great Salt Lake, use my call and
see how effective your predictions are.....
""""We had salt water near us, surrounded by a smallish land mass engulfed
by the South Indian Ocean at FT5XO and the verticals seemed to play pretty
well.""""
p.s. TKS Jim for all those ZD8Z contest contacts
73
MAL
N7MAL
BULLHEAD CITY, AZ
http://www.n7mal.com
Everyone in the world is
entitled to be burdened
by my opinion
----- Original Message -----
From: Jim Neiger
To: Bill Tippett ; cq-contest@contesting.com
Sent: Tuesday, May 25, 2010 00:49
Subject: Re: [CQ-Contest] Contest QTH
It's a good thing I didn't know all of this before plugging into all of
those horizontally polarized antennas 20 ft from the edge of Ascension
Island. Just think how much louder my puny signal would've been with
verticals............
Jim Neiger N6TJ ZD8Z
--------------------------------------------------
From: "Bill Tippett" <btippett@alum.mit.edu>
Sent: Monday, May 24, 2010 4:31 AM
To: <cq-contest@contesting.com>
Subject: Re: [CQ-Contest] Contest QTH
>> W4ZV:
>>
>>> While salt water is definitely good for verticals, but it
>>> doesn't help horizontally polarized antennas like Yagis.
>>
>>
>> Not true. Even horizontally polarized antennas gain from the salt water.
>> Besides enhancement from the ground, reflection conditions in the
>> immediate vicinity of the array, signals at the salt water edge are
>> enhanced regardless of polarization.
>
> EZNEC shows minor improvement for horizontal polarization over
> salt water but it's at high angles...not low angles as is the case for
> vertical polarization. At 14 degrees TOA, there's a 0.51 dB
> advantage, at 7 degrees a 0.26 dB advantage, at 3.5 degrees a 0.16 dB
> advantage. The reason for this is that ground conductivity has less
> reflectivity effect as the incidental angles become very low.
>
> Isn't this discussion déjà vu of déjà vu?
>
> http://lists.contesting.com/archives//html/CQ-Contest/2005-01/msg00022.html
>
> 73, Bill W4ZV
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