[Elecraft] EFHW

[Don Wilhelm]

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%)!"