That antenna is basically an upside down GP with two radials, and it works fine
if the radials are quite high above the ground, and if the vertical section is
¼ WL.
Opposite to an inverted L the horizontal wires does not load the vertical
section which must be ¼ wave long.
The other critical point of this antenna is the feed line, that should run away
normal to the horizontal wires and not to couple with vertical section.
I used such kind of antenna some 20 years ago with good results. A practical
approach is to slope some 45° the vertical section, like is done with a
classical ¼ WL slooper system.
All considered, anyway, if having two or 3 poles able to hung so high from
ground the horizontal sections, then some phased verticals (i.e. two wire T
verticals ) are possible, and is preferable to deal with radials, comfortably,
at ground level.
73,
Mauri I4JMY
> Rather than go with the *traditional L* you might want to
> consider a *Top Fed L*. W4RNL has all the data you need on
> his site here: http://www.cebik.com/radio.html The specific
> article on Top Fed L's can be found here:
> http://www.cebik.com/ltv.html.
>
> The top fed approach skips the radial issue and might meet
> your needs.
>
> 73
> Patrick
> WA7VNI
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