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echo1030
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Federal Signal EOWS 1212 - 1 minute alert

Sun Dec 04, 2022 4:12 am

Here's a monthly test of the last EOWS 1212 on O'ahu! This siren is located on the east side of O'ahu at He'eia neighborhood park, in my hometown city of Kaneohe. It was upgraded with an UltraVoice many years ago, and is set to dual tone. This particular unit has a very dominant low tone (850hz). It still bears it's original civil defense yellow paint scheme, and retained it's original solar panel from the SiraTone controls! The old radio antennas are no longer used, all Hawai'i sirens now use satellite/cellular activation. A fully up to date map of all sirens on O'ahu is available at oahusirens.com



https://www.youtube.com/watch?v=TgjDYDso8DA
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He'eia Neighborhood Park EOWS 1212 Controls.jpeg
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He'eia Neighborhood Park EOWS 1212 Closeup.jpeg
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Last edited by echo1030 on Sun Aug 13, 2023 9:16 am, edited 1 time in total.
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Sentry88
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Re: Federal Signal EOWS 1212 - 1 minute alert

Thu Dec 08, 2022 4:25 am

Wow! Love the classic sira-tone controls, nice video too.
Proud owner of nothing!
Hello, fellow siren enthusiasts. I am losing interest, but will be back on the board from time to time.

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HudsonRiverSirens
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Re: Federal Signal EOWS 1212 - 1 minute alert

Thu Dec 08, 2022 1:52 pm

Sentry88 wrote:
Thu Dec 08, 2022 4:25 am
Wow! Love the classic sira-tone controls, nice video too.
It was upgraded with an UltraVoice many years ago, and is set to dual tone
Sirens may not be sexy, but they sure work.

german_siren
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Re: Federal Signal EOWS 1212 - 1 minute alert

Tue Dec 13, 2022 11:02 pm

i love how it scares the birds

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Tyler
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Re: Federal Signal EOWS 1212 - 1 minute alert

Wed Dec 14, 2022 5:02 am

It's low tone dominant because only 4 of the speakers is running the high tone and the other 8 are running the low tone. The UltraVoice can't spread out the tone because of it's design. Each amp is mono 400W. The SiraTone amps were mono 200W, allowing an even 3/3 split.
My knowledge excels on the Federal Thunderbolt siren and SiraTone EOWS sirens. ¯\_(ツ)_/¯

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2014 Federal UltraVoice UVICU
1981 SiraTone C/B prototype
1984 SiraTone C/B

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echo1030
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Re: Federal Signal EOWS 1212 - 1 minute alert

Sun Dec 25, 2022 2:19 am

Tyler wrote:
Wed Dec 14, 2022 5:02 am
It's low tone dominant because only 4 of the speakers is running the high tone and the other 8 are running the low tone. The UltraVoice can't spread out the tone because of it's design. Each amp is mono 400W. The SiraTone amps were mono 200W, allowing an even 3/3 split.
Mahalo for the info Tyler, this definitely explains the low tone's dominance! Now you have me thinking, if the UltraVoice is only capable of producing a single tone over each 400W amp, does that mean a siren such as the MOD3012 would have a dominant low/high tone? Functionally, it seems to me that a modulator 3012 would have 12 100W drivers, similar to the 1212's driver configuration, resulting in a high/low tone having dominance over the other.
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Tyler
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Re: Federal Signal EOWS 1212 - 1 minute alert

Sun Dec 25, 2022 5:35 am

echo1030 wrote:
Sun Dec 25, 2022 2:19 am
Tyler wrote:
Wed Dec 14, 2022 5:02 am
It's low tone dominant because only 4 of the speakers is running the high tone and the other 8 are running the low tone. The UltraVoice can't spread out the tone because of it's design. Each amp is mono 400W. The SiraTone amps were mono 200W, allowing an even 3/3 split.
Mahalo for the info Tyler, this definitely explains the low tone's dominance! Now you have me thinking, if the UltraVoice is only capable of producing a single tone over each 400W amp, does that mean a siren such as the MOD3012 would have a dominant low/high tone? Functionally, it seems to me that a modulator 3012 would have 12 100W drivers, similar to the 1212's driver configuration, resulting in a high/low tone having dominance over the other.
That is correct. Only the even number celled Modulators will have an even split of Tone A and B. The only exception to this is the 3024 and the 6032.
My knowledge excels on the Federal Thunderbolt siren and SiraTone EOWS sirens. ¯\_(ツ)_/¯

Proud owner of
2014 Federal UltraVoice UVICU
1981 SiraTone C/B prototype
1984 SiraTone C/B

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