I think the Model 2 you hear is a broken solenoid on a 3T22, Purdue had many XT22s but have since been replaced by Eclipse-8s.
Come to think of it, the slow wind-up reminds me of the American Signal T-128. It could even be an electronic Whelen, but the other sirens obscure it so I can't tell whether it's mechanical or electronic. It winds up after the first xT22.
I think the Model 2 you hear is a broken solenoid on a 3T22, Purdue had many XT22s but have since been replaced by Eclipse-8s.
Come to think of it, the slow wind-up reminds me of the American Signal T-128. It could even be an electronic Whelen, but the other sirens obscure it so I can't tell whether it's mechanical or electronic. It winds up after the first xT22.
In Tippecanoe county there are no Whelens, you can hear a Sickly STH-10, that's what sounds like a Model 2.
I'm flattered my Purdue video made it on here twice. It's one of my favorites too. The new system doesn't sound too bad either, although not quite as unique.