They used to do the same thing in my area, if it fell on a holiday, they'd skip it to either the day after or next Wednesday,

That 2:1 theory sounds pretty interesting, not that it would be visible Somehow?

Judging from the apparence of the Xonrupt siren, I'd be more inclined to say that it's indeed a faster motor that was fitted.

That was my first guess too, it wouldn't surprise me if this was the case. There was some sirens that were mounted in bell towers that had the same arrangement, 8 ports but only four larger horns.

Besides the small Ciccas, there's some that look like CEN or Demays, making them a bit harder to distinguish, such as the one my friend had, I vividly remember it said "Sirene Cicca" on the motor tag.

Hell if I knew where the pictures of it went...

Ah that would be summer in English... But getting back to the 5 horn Cicca.. It's worth a shot, worse thing they can say is "No", so there's not much risk to be taken there.

Without a crane? If it's a larger Fedelcode (think Model 3/5/7), forget it. You're not going to be able to take it down without a crane given how heavy they are. Not to mention if it's on a pole, however if it's something small like a Model 2 and it's on a rooftop or a platform, it shouldn't be too ...

It could be a 5 port with a high RPM motor (a la Federal Model 2) just like one of the Ciccas you linked to earlier.

It would sound like a 10 port siren but with half of the ports.

Okay that's even weirder. I can't tell if it's got four horns like the Xonrupt unit does but that's definitely a odd one!

I'd go with the bench grinder personally, since it's easier to mount, IMHO that's a fair trade-off

I'd say go with single-phase for simplicity (at the cost of being limited in motor power if you're going to power it from a 16 Amp circuit), since three-phase is a bit of pain to deal with. That bench grinder idea should be enough.


Beware though, it goes without saying that I'm not an electrician.