[Elecraft] Beam antenna question

[Jim Brown]

On Sat,5/20/2017 9:14 PM, Igor Sokolov wrote:
> Reality sometimes differ from calculations. 

When that happens, the person doing the calculating has not correctly 
formed the equation to define the problem, or doesn't know how to 
calculate. :)

I've done a lot of modeling using NEC, and every antenna I've built has 
performed as the calculations predicted -- unless I screwed up the 
model. Likewise, in my professional life, I did a lot of careful 
modeling of sound systems I designed, and when I got the model right and 
built what I modeled, the system worked as predicted.

Brown's first law -- "if you think there's a difference between theory 
and practice, you don't know enough about one or the other." In other 
words, there were variables that you didn't consider or know about, like 
terrain, ground conductivity, mounting height, propagation, loss in 
matching or coupling methods, loss in traps, etc.

73, Jim K9YC