Dear Alberto,

I think this is a joke only:

The new Super Power Positive Feedback Antenna (SPFA) is an advanced developed antenna to CFA antenna , it is the antenna for the

century.
............................

This new superpower positive feedback antenna is much successful than any other super power projects because it consumes almost zero power input and generate any super power output up to Terra watts ; much more powerful ( with zero input power )than any other types of the future superpower projects.

Hummor is good not in April only:-) This make clear CFA ('common CFA'
also) is yet another perpetum mobile. Nothing else...:-)

73 de RA9MB/Alex
http://www.qsl.net/ra9mb