No information, a manual that isn't helpful, aside from that, what
makes it so good?

In other words, why not build an antenna that suits your needs? As
far as that goes, what about the KGD antenna was appealing? There is
nothing particularly remarkable about gracing it with a term like QRP.

Hello...
Richard, you are right ! This antenna isn't a special case. It is only a
very short dipole with a capacitor which adapt the impedance of the antenna
at the coaxial line. Nothing very new or even miraculous! (I do not believe
in miracles ;o).
I just want to make a comparison between several types of antenna (including
a miraculous o).
I do not therefore wish to innovate in the miracle, but simply to replicate
some in order to compare them (without spend to many money ;o)

72