Thing is, Brad’s not telling the entire story of the US AM stations, & the US issue that’s killing the AM stations isn’t happening here.
In the US the FCC have screwed the AM stations right down.
HD Radio’s digital part interferes with the AM analogue part of the hybrid signal, thus essentially killing off AM because people can’t listen. Many stations have turned off the digital HD Radio signals.
Another problem is, that in the US, AM stations are packed in, not only in adjacent markets, but also within each market, therefore they all (or most) have day night switching, to restrict interference, especially via night skip/skywave propagation & the night time powers are so low & restricted, that in many places you can’t receive the station at night, if you’re further than 15 - 20 km out from the transmitter site.
The daytime power levels are also low in many cases & suffer not getting high enough above the background noise floor (similar to here).
Yes there area still some of the big powerful “Clear Channel” stations (not Clear Channel the company, but clear channels, high power big distances between stations on the same frequency, essentially channels clear from interference), but they’re mostly at the lower end frequencies & in/around the state capital cities.
Another problem in the US is, that because of the use of HD Radio, the useable audio bandwidth of the signal for AM analogue is so narrow the AM stations sound like crap. 5kHz audio is pretty much the limit, most AM audio is only around 3kHz in the US, & because of this, most new receivers are also limited to this level.
If you’ve bought a cheap AM radio here in the last 10 years or so, you’ll probably find it sounds pretty ordinary, that’s because they’re made & limited to this narrow bandwidth, if you listen on a good wide-band AM receiver, the same station would sound much better. End result AM sounds crap so people don’t listen.
That’s why the US stations are wanting lots of low power FM translators. To give them better sound, but also to increase their service area (especially nighttime).
There’s quite a few of the regional/smaller stations who play music in the US, have turned off HD Radio, widened the audio bandwidth & re introduced AM Stereo, the power restrictions are still killing them though.
Ultimately if you can’t get a signal out that people can listen to, then you can’t make any money off advertising sales, so the only option is to turn off the transmitter & go dark, which unfortunately a lot of stations are now opting to do.
The US proposal is many very low power FM translators (much like our narrowcasting) where each one only reaches 10km’s or less, what Brad is proposing can’t really work here, our FM spectrum is too crowded in most places as it is to fit many more high power services in.
Also where is this “proposal afoot to convert all AM station to FM” that he speaks about? First I’ve heard of it & I haven’t seen any plans about it in ACMA’s future spectrum use plans.