Recreating a Carto map showing Portland Trailblazers radio coverage

Carto makes their data available in GeoJSON format
The first step was downloading the data which has the locations of each radio station that broadcasts

The basemap for the Carto map is recognizable as the Stamen Toner Map. Plotting the GeoJSON on top gives a start to the map

Convert the points of the radio stations to circles and then vary their radius to get the desired coverage. Carto did not have any attribute to show radius so this was a lot of iterations to get the desired outcome.