The FCC has ruled that simply turning on the transmitter and broadcasting a dead carrier isn't enough, so it wouldn't count. A return to air needs to consist of actual programming.
I'd like to see chapter and verse, or R&O, on that one.
Last I checked, it was perfectly legal to broadcast dead carrier for an entire hour with just the legal ID at the top of the hour and EAS tests/alerts at the appropriate times.
I know some FM stations used to do that to allow their SCA clients to remain on the air overnight when the station didn't have any staff and didn't want to bother paying for them. This was pre-automation, though. Nowadays there's little realistic excuse not to have SOMETHING on the air, even if there's...AFAIK...no FCC requirement to do so.
In fact, to keep the license alive, they only need to broadcast one legal ID every ten days. No further FCC notification would be required.
Of course, if a station did this and someone filed a petition to deny at license renewal, and had proof of the station's actions (or inactions)?? Well, I would think the FCC might **** an eyebrow at that to say the least.
Although AM station licenses aren't quite as valuable as they used to be in ages past......isn't an AM license still worth holding on to? It's not like the FCC is passing them out like free after-dinner mints.
Eh. Depends. Directional AM arrays can cost a pretty penny in monthly electricity bills. I can testify to that directly with 1290; it ain't exactly cheap. For any reasonably successful broadcast operation, it's not a crippling cost by any means...but for a total mess of a station with no revenue, then it can get expensive pretty fast. Way more than most folks could possibly subsidize out-of-pocket.