[Elecraft] Inverted L for 160 meters

[Jim Brown]

On 8/26/2020 4:20 PM, Nate Bargmann wrote:
> A low horizontal antenna has its place, for local work especially out to
> a few hundred miles reliably.  Horses for courses and all that.

That's an urban myth. A low horizontal antenna is very lossy, and has 
much weaker radiation at ALL angles, including high ones. The origin of 
the myth is that ARRL Antenna plots set the peak radiation to 0dB. But 
when plot the vertical field strength for all heights on the same scale, 
you get the family of curves beginning with slide 13.

Study http://k9yc.com/VertOrHorizontal-Slides.pdf

There is an optimum range of heights for high angle radiation, and it 
isn't low. Slide 19 shows that the optimum height is about 55 ft on 80M, 
and high angle drop by only 2 dB at 90 ft. Divide those heights by 2 for 
40M.

73, Jim K9YC