Wes,
I do not doubt what you are saying about 1/2 wave verticals, but most
EFHW antennas are mounted as a sloper or a horizontal antenna.
For portable operation, the main concern is for the ability to feed the
antenna, and not about maximizing the far field strength.
73,
Don W3FPR
On 2/12/2017 12:34 PM, Wes Stewart wrote:
Alas, if only this was true.
Google "radial system design and efficiency in hf verticals" and you
should get a cached version of Rudy Severns' paper of the same name. In
it he states:
"Alternately we can graph efficiency in terms of Ga as shown in figures
3 and 4. Unfortunately this also shows how inefficient verticals are
even over very good ground. Very depressing! For example, with very good
soil (0.02/30) and 128 1/2-wave radials, the efficiency of a 1/4-wave
vertical is still only -2.76 dB (53%)!"
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