My father was a dispatcher with the Cleveland Fire Department from Sept of 1957 to July of 1981. I was looking for any Cleveland Fire broadcasts from that era.
Recordings from that far back will be tough. Try checking with the Western Reserve fire buff group, or the CFD fire museum, to see if they have any members who might be able to help.
That being said, I fondly remember listening to Cleveland FD (before they went to the dark side) when visiting my parents in Shaker Heights.
I was fortunate enough to be able to tour the old alarm office before they retired the old Gamewell pull box system. Got to tour the the fireboat, too.
KQA216 to the fire department... a box alarm...
And the recorded voice ID: KQA216.... Cleveland, Ohio.
Fun listening.