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ACA Alertronic AL-4000 | Hi-Lo | Noon Whistle | Bloomington, Wi

Thu Nov 01, 2018 1:27 am



https://www.youtube.com/watch?v=4t7ZOI1eH4s

Happy Halloween! Crossed another siren off my list of stuff in the area to re-record with the PowerShot. Which of my Google Pixel filmed videos would you like me to re-record with the PowerShot? Let me know in the comments below!
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Re: ACA Alertronic AL-4000 | Hi-Lo | Noon Whistle | Bloomington, Wi

Thu Nov 01, 2018 2:13 am

Can't say I have ever heard an ACA siren in hi-lo before...
Owner of a 1968 10/12 port 3 signal ACA Allertor 125 and too many mini sirens.
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ModulatorMan
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Re: ACA Alertronic AL-4000 | Hi-Lo | Noon Whistle | Bloomington, Wi

Fri Nov 16, 2018 3:29 am

Kudos on the vid, I like how the volume appears to get louder, possibly that's how the software is?

Either way, nice find!
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DJ2226
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Re: ACA Alertronic AL-4000 | Hi-Lo | Noon Whistle | Bloomington, Wi

Fri Nov 16, 2018 5:23 pm

ModulatorMan wrote: ↑
Fri Nov 16, 2018 3:29 am
 Kudos on the vid, I like how the volume appears to get louder, possibly that's how the software is?

Either way, nice find!
It's an analog siren, so there won't be any software driving this one. I think the amps have a setting where they turn on with the tone generator. The amps would have to charge up before they hit full power. Loudoun's sirens do that when they activate, which is why they have a soft ramp up. I could be wrong though. Amplifier technology varies depending on the manufacturer.
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Chem_Boffin_6589
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Re: ACA Alertronic AL-4000 | Hi-Lo | Noon Whistle | Bloomington, Wi

Fri Nov 16, 2018 7:13 pm

Loudoun's amplifiers do it as a matter of aesthetics, given they use a rack mount Crown (or other makes) amplifier.
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Re: ACA Alertronic AL-4000 | Hi-Lo | Noon Whistle | Bloomington, Wi

Fri Nov 16, 2018 8:34 pm

Awesome!
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