In a message dated 8/3/04 8:25:23 PM Eastern Daylight Time,
[EMAIL PROTECTED] writes:
Mediocre? I'll match it against any trap dipole. If I didn't have the
G5RV I would suggest a windom. Had a trap dipole once and long wire beat it
G5
RV beat the long wire. I have read varying
A simple ground stake or single wire counterpoise can be expected to produce
antenna efficiencies of over 90% when used with an end fed *half wave* wire.
The ground resistance is in series with the radiation resistance. A half
wave shows several thousands of ohms at the end while even a crummy
Absolutely, for QRP levels!
With the high impedances come very high RF voltages - voltages in the
hundreds, even thousands of volts. That's why compact ATU's like the
Elecraft ATU's can't handle those impedances - even if they could affect a
match the voltages would destroy the caps, relays and
Sent: Tuesday, August 03, 2004 15:58
Subject: RE: [Elecraft] 125' EFHWA (was: long wire balan)
At least it's not another TLA (Three-letter Acronym) :-)
I work in aerospace, a field rife with with TLA's.
73,
Dean K0MKT
K2 #4359 (finishing alignments tonite, then on-the-air
I agree your findings may be true. Really depends on what you want the
antenna's to do. On 20 meters I would have to say that you would have to have
a very good dipole to match the G5RV since that is what a G5RV really is. I
don't notice any directivity at all with my G5RV on 40 and 80 or 30
On Mon, 02 Aug 2004 20:46:17 -0500, John Rader wrote:
125' EFHWA strung between.
These abbreviations drive me nuts! What the hell is an EFHWA?
Jim K9YC
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Thats easy Jim, its in Slobodian and means a dipole.
Or you can make up your own definition. The last three could be Horizontal
Wire Antenna. You fill in the gaps yourself for E and F.
Likewise the sentiments on strange abreviations.
Bob, G3VVT
These abbreviations drive me nuts!
Me too sometimes ;-)
EFHWA - End Fed Half Wave Antenna - Some examples found on the web:
http://www.qsl.net/aa5tb/efha.html
http://www.qsl.net/aa5tb/halfwave.html
http://www.g3ycc.karoo.net/endfed2.html
http://www.qsl.net/aa5tb/coupler.html
A commercial version, very nicely made, in my opinion, is made by Par
Electronics and sold by Universal Radio.
It's got a sealed coupling network with a SO239 and the actual antenna
wire is replaceable.
73, doug
From: Trev - K6ESE [EMAIL PROTECTED]
Date: Tue, 3 Aug 2004 13:49:28 -0700
: Tuesday, August 03, 2004 2:49 PM
To: Jim Brown; Elecraft List
Subject: Re: [Elecraft] 125' EFHWA (was: long wire balan)
These abbreviations drive me nuts!
Me too sometimes ;-)
EFHWA - End Fed Half Wave Antenna - Some examples found on the web
Mediocre? I'll match it against any trap dipole. If I didn't have the G5RV I
would suggest a windom. Had a trap dipole once and long wire beat it G5 RV
beat the long wire. I have read varying reports on the G5RV some call it
compromise others love it. I would say it's the best antenna I
Perfect lot for a G5RV. My lot is about the same with tree's in the front and
back. Mine is hung between a front tree and a back tree. Power lines are in
the front only a few feet from the end of my G5RV No problem with it. It's up
30 ft and works great in all directions tunes all bands
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