The first four sirens (three pole mounted 1003s and one 3t22) were put up sometime in 1977. The BGSU 1003 was added a year later to provide coverage for the eastern parts of campus that weren't covered by the Clough street 1003. This was mentioned in a BG News article from January 1978...
Article (page 5):
http://scholarworks.bgsu.edu/cgi/viewco ... xt=bg-news
Wood County originally tested on the first Friday (later changed to Saturday) and used the three main signals (alert for tornado, warble for nuclear attack, and hi-lo for fire). The BG News used to print notices for the tests...
Article (page 4):
http://scholarworks.bgsu.edu/cgi/viewco ... xt=bg-news
I remember hearing the hi-lo a few times during the 90s, possibly set off by accident. The pole mounted 1003s were set at chopper level 6 while the BGSU 1003 was one or two levels lower. I once watched it during a test when I was 7 (well before the STH-10 was put up)
The first 2001AC was put up in 1993 at Conneaut and Mitchell (replaced in 2005 with a 2001-130 along with the three pole mounted 1003s). The 3t22 was removed sometime in the early 2000s and the BGSU 1003 was shut off around this time (the horn remained pointed to the south until heavy winds - or something - pushed it so it pointed east for the next 10 or so years before it was removed in 2013).
Here is a Google Earth map with the locations of the old siren system (1003s, 2t22, and older 2001):
https://www.google.com/maps/d/edit?mid= ... 0A0NvR4aIA
Also, here is a birds eye view of the Poe Rd 1003 (from a 1979 Bowling Green Welcome book - page 31 - ohiomemory.org):
http://www.ohiomemory.org/utils/ajaxhel ... DMROTATE=0