Wed Jul 03, 2013 10:49 am
The STH-10 was a great siren. It had a nice sound for single tone siren which carried well. Also had a nice startup and LONG winddown.
The city of Smyrna, GA(where I formerly lived) installed a system of these sirens in the 70s and enlarged it over the years. They were tested every Saturday at noon. I could hear one inside my house with the windows closed; if I happened to be outside could hear a couple more winding down at end of test.
Several years ago Smyrna disconnected the STH-10s and installed a system of Whelen Vortex sirens. Some of the Whelens stand beside silent STH-10s now.