2010 Air Raid Siren Demo

[Alasiren1977]

Really cool video done by the Geek Group!

http://www.youtube.com/watch?v=MWan6L18psQ

[TBOLT1000]

when they turn it on, it sounds the same same as a T-128 even though this siren in the video is 9 ports while the T-128 is only 8 ports.

[CJ]

In the video it's only powered off 1/3 of it's rated voltage... but I would imagine the horn shape would give it a somewhat similar tone to the T-128

[Ninja Squirrel]

The siren is an RM-130. I remember a video they did where they demonstrated some sound property with the exact same siren.

[Alasiren1977]

The siren is an RM-130. I remember a video they did where they demonstrated some sound property with the exact same siren.

What year was the RM-130 made initially?

[System 7000]

What year was the RM-130 made initially?

It was originally made in 1985. Let's not get into another argument about this, but I believe that it was original called the Performance Penetrator, then the PN20, then the RM-130. It was replaced in the ASC range by the Tempest T-128. Jim Biersach left a comment under the video:

I designed and built this model siren starting in 1985 as owner and president of Alerting Communicators of America (ACA). The company was sold to Gus"Sandy"Wirth Jr. in 1990 and he renamed it American Signal Co. I still have the design drawings in AutoCad, Solidworks and Anvil.
Sincerely
James E. Biersach P.E. #14426
Alerting Communicators of America

Regards,
Jerry.

[Jpressman8]

when they turn it on, it sounds the same same as a T-128 even though this siren in the video is 9 ports while the T-128 is only 8 ports.

They are only running it at 50%.

[CJ]

They are only running it at 50%.

1/3 actually, they are meant to run on 72 and it's running on 24. [/smartass]

[Jpressman8]

They are only running it at 50%.

1/3 actually, they are meant to run on 72 and it's running on 24. [/smartass]

So these are powered by 6 12v batteries? Was'nt aware they were 72 volts. Correction 33%

[holler]

The P-20 suffered from the same problem that some of the new sentrys have:

A battery cabinet the size of a Volkswagen hanging off the side of the pole.