My Friend Erma(OTR show) was not good audio quality on most so swapped those for The Mysterious Traveler and now have that, plus Gunsmoke, Our Miss Brooks, Lights Out, Escape, Nightfall, Suspense, Father Knows Best, and CBS RMT. 2500 shows roughly in all!
OTR comes on at 10PM(one episode) and then from 12 midnight to 3 PM back to back episodes. Teenage Dreams/ Wilson Beach/ 101 and Below(Artisan's shows) at 7 PM daily and oldies the rest of the time.
1630 AM with Procaster covering my area in Toronto.
One show I'd highly recommend is The New Adventures of Nero Wolfe, broadcast circa 1950 and starring Sidney Greenstreet. Excellent audio quality if you get the OTRR (Old Time Radio Researchers) versions, and 25 of 26 shows are available. They've obviously rerecorded the transcription discs at a high bit rate, and the sound is very clean. Plus the mysteries are clever, with humor mixed in (they follow the Rex Stout characterizations very closely).
CBC also broadcast a Nero Wolfe series in 1982 (13 shows in all). I listened to a few a long time ago, and seem to recall that they were good as well (and a bit longer at 45 minutes in length), with high quality sound.
I've also been listening to the 1946-47 series of Sherlock Holmes with Tom Conway as Holmes, and Nigel Bruce as Watson. This was the series after Basil Rathbone went on to other pastures, and the sponsor changed as well from Petrie Wines to Kreml Hair Tonic.
Whereas the sound quality of the Rathbone shows was poor in some cases, and many shows are missing, this series sounds much better, and all 39 episodes exist. Nigel Bruce would leave the series as well at the conclusion.
Unfortunately, the scripts weren't quite as good as the earlier Boucher/Greene ones. Still, very entertaining, and the Conway portrayal probably is closer to the Doyle Sherlock Holmes than Rathbone (although I still prefer Rathbone just for sentimental reasons, mainly because of the movies).
You couldn't go wrong broadcasting these either.