Now I actually have time to explain how this works. It is like a thunderbolt in a way. A solenoid pushes a metal slab over the stator hole for one tone. The solenoids are concealed inside the chopper tube instead of two bulky boxes that are visible. The siren depicted in my sketch is the rolling mea...

My concept of how a coded hurricane works.

I am responding from my alternate account (forgot the password to "thehurricane130"). I recently visited the siren and the power lines must've blew down or were removed since that google maps photo was taken.

I found this low mounted model 7 in a small town so I got this Picture of the tag. The tag claims the siren is a model 7, even though it is clearly dual tone. Is that normal? I also wanted a date code out of the serial number.

This siren is by the dennison MN city hall. This is a sentry siren 3v8h