I've posted about this already, including how these systems function. Probably you can research/review such in a search of this Forum.

IIRC, there have been many, many discussions even here on Part15.org about "Part 15 AM" antenna systems with radiating lengths greater than 3 meters.

See the thread about "antennas" vs ground conductors on the ALPB forum.

I suppose that this approach might be successful as long as FCC field inspectors are able to be convinced that the situational ethics/needs of operato...

RE: It is what NEC does with Part 15 level signals, and their application in the real world (not a dream world, full of simplifying assumptions) that ...

Building obstruction graphic shown below:

RE: ... It states right in the documentation that if the model is bad, then the results will be inaccurate. If the assumptions don’t map to the real ...

radio8z wrote, "Rich, is the change in slope on the graph at D = 30 meters due to the transition out of the near field into the far field? ... " Yes,...

Graphic for the opening post in this thread:

RE: And your point is … ? What led to that result? I attempted to re-post it just after it went missing, but that was not permitted by the Part15.o...

‘These formulas are designed for higher power transmitters, not part 15. For example my part 15 has no loading coil. The efficiency is higher then he ...

RE: ... The actual hypothesis is that adding obstructions will change that graph significantly (i.e., it doesn’t address the effect of elevation alon...

My post at is appropriate in this thread, as well. I posted it with a new thread title to make it easier to search for (and find) in the future.