Total posts : 45366
I’ve thought of something similar, 100 mw, no antenna/ground restrictions, whatever you could do to have it scale within your budget and needs would be okay. What I think is that most new and unschooled broadcasters wouldn’t have the wherewithall to put up the most effective antenna and ground, and would be limited to shorter range.
Rich has shown that the local signal from 100 mw can reach a kilometer, or .62 miles from a full quarterwave broadcast tower and ground, simplifying his calculations, though most stations wouldn’t achieve this range. Most people who would find the signal would be within about a mile, give or take, whether city or country. That power is unlikely to skip to other areas or shock someone working on the transmitter.
The hobbyist nature of the service would stay intact with the low power, but would be more useful for small neighborhood stations, and make AM the place to go for real localism in the future, with TIS and neighborhood part 15.