Never seen one of these!
FROM THE GOLDEN AGE TO GOLDEN ARCHES
Also interesting is the blog post which it accompanies: Radios Next Golden Age.I haven't actually read the whole thing yet but intend to go back to it. And its not much specifically about part 15 but it does address it,:
"...If you want to put your own station on the air without breaking the law, though, there is another option. Part 15 of the FCC regulations ruling electronic communication do allow for smaller FM and AM broadcasting with limited outputs of power and strict guidance for interference with other stations. But small is beautiful, right? These types of stations can potentially reach a block to a few blocks in a city neighborhood, and can be quite fun to run with a minimum of equipment and technical know-how. Certain patriotic groups have even advocated setting up networks of Part 15 stations. Synchronized to a single source, or daisy-chained together, they would play the same material, creating a low-tech network capable of blanketing larger areas—given enough stations.
Pirate radio and Part 15 stations can be used to create healthier radio ecology than the current monocropping..."