Information of interest:

What is different about the CFA? As an example, a CFA only 21 feet (6.5
m) tall, located at Tanta in the center of Egypt, provides AM broadcast
service at 1.16 MHz (258 Meters) to millions of people from Cairo north
to the coast. Certified measurements provide evidence that this small
CFA produces a radiated signal almost 6 dB stronger than the previous
1/4 wavelength vertical broadcast tower which was 211 feet (65 Meters)
tall. To express the performance a different way >> with the tall tower,
a 100,000 watt transmitter was required for the desired coverage. With
the miniature CFA the same coverage was attained with the transmitter
power reduced to 30,000 watts.

As seen on:
http://www.antennex.com/

73, Mark, F6JSZ
http://perso.club-internet.fr/sovergne