Quad vs Yagi (or log)
 

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

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

Hi Dave,


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

Apparently you did not click on the image (page listed above) for the
SWR/Bandwidth graph to zoom the image and scroll to the bottom chart
which shows actual performance SWR @ Fr = 1:1 Z=47R Bandwidth = 680
khz @ 10 meters.

Actual and modeling parameters are shown on the web page listed
above.

The following page are photographs of the monoband 10 meter version

http://www.gopherlink.com/DeltaXray/hfantenn.htm

However the Yagi and the Quad require impedance transformations – the
stated modeling parameters specify "series current source" for all
three modeled antennas.

73,

Rich

W9JUC (since 1954)


Dave Shrader wrote in message news:xaJXb.39183$jk2.86580@attbi_s53...
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