These images appear to be for Maximum Gain. Look at the VSWR curves. You
will need a tuner to get today's rigs to load any of these antennas.

Rich wrote:

The following web page shows azimuth and elevation projection
comparisons for a 2 element quad with quarter wave spacing vs. 3
element Yagi vs. 2 element delta loop driven array (both elements
driven.)

(A larger image is available by clicking on the smaller images.)

http://www.gopherlink.com/DeltaXray/...-Detailed.html