I can remember the STL-10 that was located in a nearby city. This siren had a beautiful sound to it, but was scrapped when it was retired by a Whelen omni directional unit. The local police station had the pull-lever (PB) box, which ran a semi-coded fire signal of three 20 second blasts. However, the downtime between the first and second blasts was only three seconds. While the PLB worked just fine on the Model 5, the STL-10 would barely start downwards, when it went back up again. You had to really listen to tell if it had been set-off for fire or tornado.
On U.S. Highway 12, on the south shore of Wamplers Lake, which is located in northwest Lenawee County, there is a 1978 vintage STL-10A that runs off 440 voltage. This siren is the best STL-10 I ever heard. The motor pickup and wind-down is just like an STH-10 that is very, very fast. I always enjoyed hearing that siren along with the two nearby STH-10s running for a three minute fire cycle. Likewise, this siren was even more effective at night, when the wind was blowing to the north. Many people have claimed they heard this siren up to seven miles away in the wee hours of the morning.