Home › Forums › temp › Elevated “Part 15” AM Systems Using a Counterpoise › Counterpoises and Obstructions
Total posts : 45366
If you are in a built up area, and you can use an elevated counterpoise (radials), then that is probably preferable.
Wouldn’t such compliance with Part 15.219(b) depend on current FCC policy, and the assessment of the FCC field agent inspecting such an installation?
But if you can’t, then you will have to experiment between the elevated mount with no ground (minimizing the effect of obstructions, but keeping safety in mind) vs a ground mount (which will have better performance, but potentially also more signal loss due to obstructions – it will also be safer).
Just to note that radio waves in the AM broadcast band are not much affected by typical “urban clutter.”
For example, the signal strength displayed on my Tecsun PL-310 portable receiver is the same just outside my house on the side closest to the transmit source as it is just outside my house in the opposite direction.