This topic has been brought up before. It's most likely a low battery, or possibly damage to the tone generator.

Good luck! You might even want to use a wagner motor with it? XT22s used them.

It is in a ad. Fedelcode advertised this siren as the "Fedelcode Model 20".




And in this thread it was confirmed 8/12!


http://www.airraidsirens.com/forums/vie ... =salisbury

500AT Fan said it was a Model 20. Which I disagreed with. I know the top video is a Model 20, because model 20s sound somewhat like 2T22s and Allertors. Since they are 8/12, and 2T22s sound identical.

I am confused here. There are 2 videos of sirens that I think maybe Fedelcode Model 20s or 10s. One, I think for sure is a Model 20 http://www.youtube.com/watch?v=GTSmEmXUo_o It is a 10/12 port siren or possibly a 9/12 or 8/12 port. Then this, I think maybe the same siren. But, it sounds single tone...

Interesting.

There is a minor pitch difference. At least I hear that.

Doesn't sound the best, but hey! At least you got it on 110vac. Next time try 120.

Back to the high pitched Thunderbolts, Some people think, on the second video, that that Thunderbolt may be a 6 port model. (Though they have never been discovered)

Fast wail does not fit the STH-10 at all .