Total posts : 45366
Ermi Roos wrote: “An elevated antenna will not have increased efficiency if there is no conductive path from the the antenna to the ground.
But then an elevated “Part 15 AM” monopole with no, or an ineffective conductive path to an r-f ground reference or counterpoise has poorer radiation efficiency than when it is placed at the surface of the earth, and uses even a rather low-resistance r-f ground.
The reason that elevated (whip-mast) Part 15 AM antenna systems are so popular, and so vigorously defended by some is the result of the increased field strengths they radiate, other things equal.
If they didn’t produce better results, they would not be so preferred and defended.
And unfortunately, such elevated installation configurations even are suggested/recommended by some manufacturers of Part 15 AM transmitters, whether or not such transmitters have been awarded Part 15 AM certification by the FCC.
The reason they do so is not generally understood in the Part 15 AM community.