Monthly Tornado Siren Test Sauk Centre MN - May 5th, 2010

[lilaj34siren]

you my friend have found yourself an STH-10 3 phase motor and on top of that one that sounds the attack signal nice find not many are found now days

[gerbilPROJECT]

Is it my laptop or is your camera's sound recording a bit funky?

[hootergirlsrhot]

this was more and likey made in the early to mid 60s, later 3-phase models came with a 7.5HP motor, earlier models, like this is an old model and has a 10HP motor

fun fact: the STH and STL both have a 22inch rotor

[CaptainElevator42189]

Federal Signal STH-10.

[bytor55110]

Almost seems to me like something inside is catching on the horn assembly, making it shake on windup. Weird how it does that...

[Tabby266]

@bytor55110 most likely it is the torque of the motor causing the whole assembly to twist. This happens with a lot of sirens like this.

[bulldozer950]

sth-10.

[setsukun]

What kind of zoom you got on that camera? Pretty good quality for 480p.

[TBOLT1000]

the siren is a federal STH-10. you can tell by it having a single row of horns with a motor on top. these siren s are well known for having very long wind-downs. that STH-10 sounds great!

[crazywarriorman]

Lookit that thing shake!

[Siren1000T1]

This siren would be a Federal Signal STH-10. These are no longer made. Federal Signal quit making em in 2006.

[murrfarms]

@Siren1000T1 STH-10A to be more exact. It's a later model with the Marathon 10hp three-phase motor on it, just like all the newer Model 5s have (what we all call Model "7"s). Sounds like she's running on a 480V power service too, very fast windup.

[Siren1000T1]

@murrfarms Yeah I know this is 3 phase.