I can't tell what it is. A Sentry F2 or a Model D or L. It's located at the Alburtis Fire Company. On the map it says Sentry F2, but it to me look like an L. Can't tell.

The Trexlertown STH-10 was set off this afternoon for a fire call. Here's a siren ambiance if you want to listen to the siren wail.

https://m.youtube.com/watch?v=1MXHveaiDMc

This STH-10 siren is located in Schnecksville. Currently active, but very lucky enough to survive after the roof of the firehouse's social hall collapsed in early July. I do not know what model timer controls the siren nor when the siren was put up. The siren is located at the Schnecksville Fire Com...

The timer was installed in the 1950's along with the siren. I'm thinking this is a 1st generation timer. I'm still investigating on what model timer this is and how the thing works. I don't know why, but every time I see this, all I can think of is a Thunderbolt. Trexlertown Volunteer Fire Company a...

What kind of timer is this? I know it's an AF Timer, but I'm not familiar with seeing a tag that reads "Series A1". I'm not sure if this timer was used on a Thunderbolt once. This is one strange timer and the timing of fire signal is not the greatest. If anybody has the knowledge that coul...

I believe this STL is longer in service and is removed. It's located at the Tri-Clover Fire Company in North Whitehall Township in Pennsylvania.

This STH-10 siren is located in Trexlertown. It's standing not too far away next to the Lehigh Valley Velodrome. I believe this is the most active siren in the county. I have pictures of the siren's timer too. The siren has a time clock, which will deactivate the siren at late night hours into the e...

This old rotted 5 is at the Wescosville Volunteer Fire Company. It definitely has seen its days. No skirt in the middle. I wish I had her.

I'm a little fellow who is enthusiastic in fire sirens in Lehigh County, Pennsylvania. Lehigh County has various types of sirens. They have loads of STH-10 sirens and a few mystery sirens. The closest and most active siren near me is the STH-10 at the Trexlertown Volunteer Fire Company. I have plans...

I wish I could see more. I've only seen a Fedelcode Model 5, a Model 5, (can't tell if there is a different) about 3 to 5 STH-10s. Just saying, anything know how to start a topic? Just curious.