[Elecraft] My Experiences with EH antennas on 20 meters

Mon Feb 24 03:16:00 2003

Hi Gang,

While I'm skeptical of small footprint antennas (< 1/2 wavelength), I
would like to see more data on the EH antennas in practical application.
My first feeling after reviewing them is that there are probably large
losses in the matching network, but if this is built correctly, this may
not be the case. This looks like a good experiment and I'm interested
enough to try one myself. Now, the question would be how to test
effective use. How and what would we compare it to, and what would the
test be? My suggestion is to build one of the antennas for 15 or 20
meters and compare it with a resonant dipole with a station a few
hundred miles away that you can have a normal QSO with and see what the
differences are. A test like this or something similar and probably more
defined would give you some "real world" application data. If any of you
are interested, I'd be willing to try this. Looks like a weekend project
to put the antennas together, and then a few weeks of testing during
different band condx. Just an idea...

73's Trev KG6CYN
http://home.earthlink.net/~kg6cyn
http://www.qsl.net/kg6cyn

----- Original Message -----
From: Jerry Felts <[email protected]>
To: <[email protected]>
Sent: Sunday, February 23, 2003 9:09 PM
Subject: Re: [Elecraft] My Experiences with EH antennas on 20 meters

> Ya know, I've played with a couple of EH Antennas and they have both
work
> great for me. Thats running qrp, and with it sitting on the shelf over
my
> radio. I really don't care what other people say or think about them!
I just
> know mine work just fine.
>
> Jerry - NR5A
> ----- Original Message -----
> From: "Thomas Kuehl" <[email protected]>
> To: <[email protected]>
> Sent: Sunday, February 23, 2003 9:37 PM
> Subject: Re: [Elecraft] My Experiences with EH antennas on 20 meters
>
>
> > Hello Charles,
> >
> > The E/H antenna has been a subject of controversy within the antenna
> > community. Although antennas are my primary interest in amateur
radio and
> > I've published a few articles on them, I am not qualified to pass
> judgement
> > regarding the E/H antenna's operation or performance. With that
said,
> there
> > are some learned and experienced hams whom have a good deal more
> experience
> > and antenna knowledge than myself. The following links may prove
helpful
> to
> > anyone contemplating acquiring or building their own E/H antenna.
> Generally,
> > it appears that the analysis of the E/H antenna, and the practical
> > experiences with it, indicate that its gain is down somewhere around
10 to
> > 20 dB from common reference antennas. Please see the following
articles
> at:
> >
> > http://www.w8ji.com/e-h_antenna.htm
> >
> > http://www.qsl.net/iz7ath/web/02_brew/18_eh/index.htm
> >
> > I am truly surprised that you have achieved such high levels of
> performance
> > with your E/H antenna.
> >
> > Best Regards, Thomas - AC7A (Tucson)
> >
> > ----- Original Message -----
> > From: "Charles Greene" <[email protected]>
> > To: <[email protected]>
> > Sent: Sunday, February 23, 2003 7:52 PM
> > Subject: [Elecraft] My Experiences with EH antennas on 20 meters
> >
> >
> > > Ron and All,
> > >
> > > The EH antenna really works, well.  It's efficiency, as an
antenna, is
> on
> > > the order of 95%, as compared to about 75% for the full size 20
meter
> > > vertical with elevated radials I build last summer, and few
percent for
> a
> > > short fat dipole the same size but just loaded with a loading coil
> because
> > > of the high losses in the loading coil.  On 20 meters, its beam
width is
> > on
> > > the order of a few degrees, concentrated near the horizontal.  As
it
> needs
> > > no ground, its ground losses are very low. It doesn't need a
return
> ground
> > > path that includes the lossy earth ground.  >
> > > Others have had the same or better results.
> > >
> >
> > > GL on yours.  You can even buy an excellent kit at
www.eh-antennas.com
> > >
> > >
> > > 73, Chas, W1CG
> > > K2 #462
> > >
> >
> >
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> >
>
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