For point of reference, the max power allowed in the US is 50kW

alynn · on Jan 27, 2020

I don’t believe this is correct; when I look up the details of transmitters, they’re often 100kW+, e.g., https://fccdata.org/?lang=en&facid=62331 for an arbitrary example in Montana

texasexile · on Jan 27, 2020

Different power levels for different frequencies/services. Your arbitrary example is an FM station broadcasting at 94.5 MHz. AM broadcast stations are limited to 50KW. The FCC regulates ERP based on a number of factors including minimizing interference with other frequencies and a frequency's propagation characteristics. For example, UHF TV full-power transmitters power limit is one megawatt.