Monthly test of the last RSH-10 Thunderbeam on O'ahu. One of only 3 mechanical sirens still in service on island, this siren will likely be replaced very soon despite its reliability. There are various sirens in the surrounding area including an EOWS 612, DSA, Modulator 6024 and 2 Cooper Waves siren...

Here's a detailed map of the siren system on my home island of O'ahu, Honolulu County. I finally got around to uploading all my siren locations from Apple to Google maps. I've spent my whole life around this system, and grew up listening to the OG legacy system since I was a small child. This map co...

Monthly siren test, nothing too special. But the thunderbolt does have a nice windup. Model A is a bit too loud for the camera and unfortunately drowns out everything. Enjoy!

https://www.youtube.com/watch?v=gEdTRpGLRBI

I went up to record the MOD 6048 at the emerald queen casino that day but it never sounded. I called EMA and they said they they would get to it.

Hawaii state Civil Defence sirens: First working day of the month @11:45. They sound 1 minute of alert, and in the district surrounding Campbell industrial park, alert is followed by 1 minute of whoop.

Here is a recording of the kailua thunderbolt 1000BT sounding its monthly test. WAY... off in the background... my model A can be heard (aproximatly 1000 feet away)
https://www.youtube.com/watch?v=xBUeLTQ6Kb4

I'm leaning towards a sentry. It has a fast windup and a higher pitch than any 8 port M5 that I know of. Then again, it could very well be a Model 5 since we can't actually see it!

Its a Model D, not an A. The front cone of the A does not contour out in that manner. As for the mystery siren...my guess is that it is a 16 high tone Denver. If I can recall correctly, there was a 16 port denver similar to this in Fowler, CA.

I am from Washington where it gets very cold in the winter and our local voulenteer fire department used 2 model D's spaced about 200meters apart as street clearing sirens. They souded every single time they got a call, even when there was 4 feet of snow at 0°C. So yes they can most certainly withst...

These sirens are not weather-proof and are more for use on vehicles. They are not very loud at all... an ademco Wave 2 security siren could easily drown one of these out. I would go ahead and look for a Model A/D/L instead since they are designed for use outdoors and most can simply plug into the wa...