If you listen closely, it's two different sirens. They wind down at different times. I'd be willing to bet money that the high tone is a 12 port Model 5 or 7. I have no idea what the other one could be, though.

There is a third siren in Tyrone that isn't on the map. I didn't know it existed until recently, which is strange given that it's a Model 5 with a shiny stainless steel housing right on the side of 220 heading into town, about a block past pizza hut on the right hand side. No idea if it's active or ...

https://maps.google.com/maps/ms?msid=208060172087436240934.0004c122d2971bdbde39d&msa=0&ll=40.466082,-78.413243&spn=0.023344,0.055876 Altoona siren locations, air raid and fire, past and present. Had a LOT of help from the "You know you're from Altoona when..." group on facebook...

http://www.youtube.com/watch?v=K8NHuFnkdfg

Anyone have any insight on what this is?

thewoog34 wrote:I did read it... that's where I got the 600 and 800 from. That's a 3/4 ratio and the 40v has a 2/3 ratio.

I think what he's trying to point out is that they could be offering a 3/4 ratio version now. [/i]

But... Can they make a model, in which the entire siren is able to rotate like a 550 would? I had the same thought. I mean, I'm sure a significant part of the benefits provided by the modifications are in the form of increased volume from the intakes. If that is indeed the case, then you only get t...

Canada never had an XT22, but id does sound like it You're kidding, right? The FIRST 2T22 recording this community had access to back in the late 90s was from Canada. It was titled something like Alliance Alberta BC if I'm not mistaken. You can't streetview around Alliance, but the audio is still k...

Schenectadycountysirens wrote:

Allertor113 wrote:At around 0:48-49 it sounds like a Xt22.

Canada never had an XT22, but id does sound like it

You're kidding, right? The FIRST 2T22 recording this community had access to back in the late 90s was from Canada. It was titled something like Alliance Alberta BC if I'm not mistaken.

I joined the warningsirens.org forum in '98 or '99 when I was 9-10 years old. I'm 23 now. We were all much younger then, and we accumulated pretty much all the information we now have about sirens together. It was new to all of us. I remember the first recording of a Thunderbolt we ever had. I remem...

Always good to see a topic like this revived. I live ten minutes down the road in Altoona. I'll have to find out if/when Excelsior tests their Sentry, and drag my gear down to get a proper recording.