Total posts : 45366
This is an interesting one to speculate about.
What is the true capability of a part 15 transmitter with very long antenna and good grounding?
There are carrier current transmitters floating around with from 3-Watts up to 50-Watts.
Schematic diagrams exist for 5-Watt, 10-Watt, 20-Watt transmitters.
And, yes, SCWIS knows that modified HAM equipment can get the job done.