"Cecil Moore" ha scritto nel messaggio
...
According to 75m mobile shootout results, an ATU driven whip is ~8 dB
down from a base-loaded bugcatcher because the bugcatcher coil
radiates and an ATU is usually shielded and often uses powdered iron
toroids for the coils.

Yes, understand *perfectly*. My energy go somewhere, and this "somewhere" is
heating some toroid into a shield case or radiate on the air. Conservation
law.

Center load i think mean also lower ground loss, IIRC.

And as i understand, a RX shootout of the mobile whip compared with my full
size 1/4 wl vertical antenna with the same transceiver, to have a suitable
relative dB comparison, can give the best test measure i can do with my
actual equipement.

Thanks Cecil an other posters, other suggestions or links to learn more are
very appreciated.

-.-. --.-