[Elecraft] Long wire antennas

[Ron D'Eau Claire]

Frank, you must have misread my comment. 

When end fed, ANY radiator longer than 5/8 wavelength sees the main lobe
skew toward the end opposite the feed point. That's why vertical antennas
designed for low angle radiation are limited by the 5/8 rule. For horizontal
antennas, the effect is not particularly noticeable until the antenna is
more than a full wavelength. That's how Rhombics and V-Beams develop their
directivity.

There may be a null off of the end even for the long wires I've been
involved with. I am speaking of the main lobe skewing TOWARD the end instead
of being at right angles to the wire.

73, Ron AC7AC 



-----Original Message-----
From: elecraft-bounces at mailman.qth.net
[mailto:elecraft-bounces at mailman.qth.net] On Behalf Of
donovanf at starpower.net
Sent: Wednesday, January 10, 2018 8:40 PM
To: Elecraft Reflector
Subject: Re: [Elecraft] Long wire antennas

Ron, 


What you've come to understand is absolutely false except for the special
case of a long wire close to the ground. That special case is called a
Beverage antenna that radiates vertically polarized radiation off the ends. 


When you raise a long wire antenna more than about 0.05 wavelengths above
the ground, horizontal polarized radiation becomes dominant and the
radiation pattern always has a deep null off the ends. 


73
Frank
W3LPL 

----- Original Message -----

From: "Ron D'Eau Claire" <ron at cobi.biz>
To: "Elecraft Reflector" <elecraft at mailman.qth.net>
Sent: Thursday, January 11, 2018 4:08:40 AM
Subject: Re: [Elecraft] Long wire antennas 

Understand that a true "long wire" (greater than 1 wavelength) starts to be
directional off of its end (if fed at one end, that's the opposite end). 

73, Ron AC7AC 

-----Original Message-----
From: elecraft-bounces at mailman.qth.net
[mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Rich Arland
Sent: Wednesday, January 10, 2018 6:02 PM
To: William Levy; Elecraft Reflector
Subject: Re: [Elecraft] Long wire antennas 

And in a previous posting Sir William of Levy stated: 


"COSMIC rule of antennas! The more wire the better. Always." 


Hear....Hear!!!!! Dilly, Dilly!!!! Right arm, dude!!!! 


Vy 73 es gud DX! 

Rich Arland K7SZ
Cogito ergo CQ (I think therefore, I HAM) 

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