Hold a commercial first class radiotelephone operator license. Worked at a television station for many years. The transmitter i worked on had well you know how many 100s of thousands of watts we are dealing with. We had a newer RCA transmitter, but the old GE back up transmitter had an interesting story behind it. It was originally installed at the top of the Empire Sate building in NYC. It was a box car all in all with old PCB capacitors. A real health hazard especially when they would rupture. I had a job offer for chief engineer at a station in Burlington Vermont. I coulda been rubbing shoulders with the Bern many years ago.
I have never bothered with an amateur license, but considered it as a kid. Have done some SWL listening owning a couple of fairly good receivers a Kenwood R-5000 and the venerable Sony ICF2010. I cut my teeth in SWL as a 10 year old listening to Radio Havana on an old rummage sale SW receiver. .