[Elecraft] KAT2 with EFHW antenna

[Don Wilhelm]

Actually Dave, a full wavelength wire will have a " 4 leaf clover" 
pattern - that is neither broadside to the antenna, nor off the ends.  
Check out the pattern for a 1 wavelength long wire in the ARRL Antenna 
Book.  The maximum radiation is about 28 degrees from the wire - the 
radiation from the end is almost zero.

The elevation angle of maximum radiation is similar to a half wave 
dipole - about 15 degrees with a lesser lobe at 45 degrees (that is for 
a wire 70 feet high, at lower heights, the angle will be greater).

73,
Don W3FPR

On 8/24/2011 5:34 PM, David Gilbert wrote:
>
> I'm not sure I see the advantage.  A full wave end fed antenna would
> theoretically have the same very high feedpoint impedance, and would
> additionally blow most of it's radiated energy at a fairly high angle
> off the ends of the antenna instead of broadside at a lower angle.  If
> you find it that easy to tune, I suspect that electrically it really
> isn't that close to a full wavelength ... possibly because of coupling
> to earth (if it is low) or nearby structures.  Either that or there is a
> lot of loss in the system somewhere.
>
> 73,
> Dave   AB7E
>