These are WTRX 1330 and WWCK 1570 (and 107.3 translator). Both in Flint.
The clip is worth listening for anyone interested in radio. Nice reminisce.
I gather 1700 KBGG Des Moines IA has also gone off.
Not sure if they'll end up on the market for sale or if the licenses will be deleted.
I've heard all three in Kawarthas.