Gregg wrote:

Behold, Dale Parfitt signalled from keyed 4-1000A filament:

Antenna theory, and NEC modeling radically disagree with this- How
many
antennas do you want to see that are not 1/2 wave above a perfect
ground and yet show outstanding directionality?

W4OP

Phased arrays can be made directional. We are talking longwires here.


So am I. The higher a longwire antenna is in terms of wavelength, the
better defined the nulls become; i.e. its directional characteristics are
enhanced. Nothing magical about 1/2 wave above perfectly conducting
ground.
If you can read AO files, I'll be happy to send a file demonstrating this.

W4OP