Hello again,

I just found this schematic of my active antenna :
http://www.drmrx.org/forum/attachmen...6&d=1130372787
(beware of wrapped URL)

I seems that (if I can read properly AND if I understand correctly the
schematic) the RF signal is delivered to the radio via C1 capacitor...

Another simpler schematic (made by the same person a little earlier) is here and
confirms this idea...

Can anyone give me a hint ?

Thanks !

Charly