Greenrid wrote: ↑

Sat Apr 13, 2024 2:03 pm

I for some reason can't see the images. You may have to upload the images to the post, so they are more likely to be seen!

Shows fine for me

SirensOfAustralia wrote: ↑

Wed Apr 10, 2024 11:34 am

These would be my most favorite shots of all time. Albury Civic FRNSW's Grifco 888 during sunset!

Some people are just posting pics in this thread of any old siren taken any old way.

But this? This is epic.

Any updates on this?

Doesn’t seem like anything has happened yet and we’re in peak severe weather season.

Just use some standard headphone style hearing protection or you can use some noise cancelling headphones like AirPods Pros. This is terrible advice no one should follow if listening to a siren up close. Noise cancelling headphones use certain frequencies to cancel out ambient noise entering the se...

ATI sirens, at least from the limited documentation I've seen, are little more than Raspberry Pis (or something equivalent) mated to an amplifier board. Its little wonder so many of them just play things back.

This is a slight deviation from the original question, but what I’ve heard people saying that sirens such as the Cyclone have been reverse-wired too, so what do they mean by that? ACA sirens used curved veins in the rotor and those curves continued into the stator. This allowed them to more efficie...

Most informative. Thanks for sharing!

I’d be interested to know more. Thanks for your reply!

NahIDee wrote: ↑

Tue Dec 26, 2023 11:51 pm

Apparently the Carson-recommended equivalent

First off, best of luck. Looking beautiful.

This made me wonder: did Carson make everything for ACA's electronics in the early days? Curious what, if anything, ACA did in house with the electronic components.

Greenrid wrote: ↑

Sat Dec 16, 2023 12:55 pm

Ohh, I thought they all oscillated like that!

....of all the many rotating Alertronic videos on YouTube, how many of them have you seen them oscillate....???