Yeah, I live near Longmont, CO and they have had their fair share of ATI's shenanigans. Thanks to the ATIs malfunctioning (twice, one time sirens had to go be manually shut off.) they're now taking down their system, and don't plan on installing a new one. They're just going to rely on reverse 911 a...

That's a pretty neat little setup!

I would say they're pretty rare for a few resaons: single phase motors don't last as long as 3 phase motors so likely more single phases have been replaced (proportionally). Also I'd guess more 3 phase Allertors were produced so I would say that if you found an Allertor the chance of it being an All...

If I've got time, Colorado's SWA is on April 14th so I may be able to record a 4004, 3016 analog, and if I can really stretch it I could get another 4004 or a 2001.

I can hear a train horn at my house from about 4 miles away, as long as it's clear and there's no wind.

That's pretty odd but it would be cool to see nonetheless.

Oh, interesting I couldn't see through the mesh on Google so I had no clue what it was.

I have heard multiple ideas of what this is, however I'm still not sure what this is because it could be one of many things. I've heard a model 5 and a Siro-Drone as guesses. This siren is located in Denver, CO.

Dang, that's unfortunate that they are just leaving them to rust.

Yes, I was just saying that in general a siren with more ports would be a higher pitch, I know motor rpm also accounts for pitch. For example a 3200rpm siren with 7 ports would be a lower pitch than a 3200rpm one with 12.