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Re: [IRCA] EWE Antenna question. (2nd attempt!)
- Subject: Re: [IRCA] EWE Antenna question. (2nd attempt!)
- From: "John H. Bryant" <bjohnorcas@xxxxxxxxxxxxxx>
- Date: Fri, 04 Jul 2008 13:03:32 -0700
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Barry,
I've operated EWEs from the classic size that you quote up to 70' x
100'. They are VERY forgiving of everything except a poor ground, as
others have said. I've also shown experimentally that EWEs act like
the upper half of a loop (the lower half being reflected by the
ground.... That means that theoretically (I think) a EWE has about
double the gain of a Conti Super Loop or similar. In my tests,
instead of double the gain, it was about 60% more for the EWE, when
the dimensions were the same. HOWEVER, if you can't get a R*E*A*L*L*Y
good ground, the Conti Loop or other ground dependant single turn
loop is the way to go. What I've done here on Orcas Island is erect
my large antennas first as EWEs and then, later tried them out as
Super loops... the conversion is a ten minute job. It turned out that
here, built almost on bedrock, I was not getting good grounds despite
a lot of work and $. The Conti Super Loops had much superior S/N, so
the loss in gain just wasn't important, in this application.
John B.
Orcas Island, WA, USA
Rcvrs: WiNRADiO 313e, Eton e1, UltraLights
Antennas: Two 70' x 100' Conti Super Loops, West and Northwest
At 07:42 PM 7/4/2008 +0100, you wrote:
Hello IRCA 'ers
The standard EWE antenna calls for two 10 foot high supports
which are 25 feet apart. Looking at my garden set up, the wishes of
"her indoors" and useful support for the 10 foot uprights it is the
25 foot apart that is the stumbling block for me! If the uprights
were 30-35 feet apart would this adversely affect the EWE performance?
Barry
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