Here are some sources of FREE OTR
Downloads
Golden Age of Radio (Max Schmid)
Past Daily (many news programs)
WRVO Tuned To Yesterday Podcast
WRVO Tuned to Yesterday Schedule
Otrplus (requires free registration)
Streaming
Old Tyme Radio Network (Jerry Haendiges)
Those Were The Days (Steve Darnall)
Those Were The Days (Chuck Schaden archived)
The Star Spangled Radio Hours site #2
When Radio Was (requires free registration)