[P1] AirPort card not seeing AirPort Base

[Roberto]

Hi again,

and thanks to those who replied.

I solved the problem by setting the channel of the AirPort Base to 11. I've
discovered that the two old AirPort cards are capable to choose from
channels 1-11 (that is, from 1 to 11), while the new card can choose only
from channels 10-13. The AirPort Base was set on channel 1, hence the
«blindness» of the new AirPort card towards the Base.