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by Synther
Sun Mar 03, 2024 2:09 pm
Forum: Main Outdoor Warning Sirens Board
Topic: Experimental British Siren.
Replies: 15
Views: 2715

Re: Experimental British Siren.

Please leave moderation to the moderators... Post bumping is allowed as long as you provide a worthwhile contribution. The "bump" was approved, as it is not a long shot to ask if the article was moved, or if anyone has the article archived somewhere. Topic is locked, please PM if you have ...
by Synther
Wed Feb 14, 2024 10:22 am
Forum: Main Outdoor Warning Sirens Board
Topic: How to get "Attack Mode"?
Replies: 4
Views: 328

Re: How to get "Attack Mode"?

There are automatic timers with adjustable cycle lengths available online. To keep everything compact, find one rated for the load you are controlling. At 120VAC, I recommend 2A or greater.
by Synther
Wed Feb 07, 2024 11:14 am
Forum: Main Outdoor Warning Sirens Board
Topic: Sentry F2 vs Federal Model A?
Replies: 5
Views: 351

Re: Sentry F2 vs Federal Model A?

Based on the specifications listed online, the Sentry F-2 and Federal Signal Model A are identical in output volume. However, the Sentry F-2 draws 2.5A at 120V, and the Model A draws 1.9A at 120V. Brand new F-2s are available for half the price of a Model A, but both sirens are generally regarded as...
by Synther
Fri Jan 26, 2024 12:58 pm
Forum: Main Outdoor Warning Sirens Board
Topic: Building a loud siren
Replies: 11
Views: 722

Re: Building a loud siren

That is very helpful, thank you. Do you have some advice about the amount and exact shape of the vanes? 2800RPM+ means 3000RPM would be good or is more more better? I guess then I we would need a belt drive since most motors are either 1500 or 3000RPM with a 50Hz grid. The siren would be mounted ho...
by Synther
Fri Jan 26, 2024 10:39 am
Forum: Main Outdoor Warning Sirens Board
Topic: Building a loud siren
Replies: 11
Views: 722

Re: Building a loud siren

The main thing is I need some plans or guidelines for the design. I think the execution is not an issue, but I have no idea how to design the fan (is it called that), the slots and horns, if we need horns. I don't know what type of design would be good in general for our use case. The design of a s...
by Synther
Mon Jan 15, 2024 11:03 am
Forum: Siren Maps
Topic: The Official Arctic Siren Map
Replies: 10
Views: 44979

Re: The Official Arctic Siren Map

Please remove the map jurisdiction polygon, or move to a different layer, it obstructs the view. Otherwise, great map, it's cool to see sirens marked in a region that otherwise gets overlooked.
by Synther
Fri Nov 24, 2023 7:32 am
Forum: Main Outdoor Warning Sirens Board
Topic: Low mounted Sirens in US
Replies: 1397
Views: 768371

Re: Low mounted Sirens in US

3t22Gaming wrote:
Fri Nov 24, 2023 6:58 am
Quite hard to see, but here's is a Federal Signal Model 5/7 at the Ogden-Hinckley Airport, UT

https://maps.app.goo.gl/7vmRBzhGcjgDeZKv7
Here is a photo of this one.
DSCN2843.JPG
DSCN2843.JPG (7.77 MiB) Viewed 22016 times
by Synther
Mon Nov 06, 2023 9:35 pm
Forum: Main Outdoor Warning Sirens Board
Topic: Where is the sound loudest on the chopper?
Replies: 4
Views: 11287

Re: Where is the sound loudest on the chopper?

Like said above, most of the sound comes from the ports, it's where the action happens. Some of the sound does feed back out of the intake, but the sound level is marginal and is generally ignored in many designs.
by Synther
Sat Nov 04, 2023 9:01 pm
Forum: Main Outdoor Warning Sirens Board
Topic: Old Siren Mount?
Replies: 9
Views: 22102

Re: Old Siren Mount?

Not sure why you're using "Incorrect" in quotes as if "M-5" and "M-10" are, in fact, correct names. In accordance to the third rule of conduct for this board, Snowpix has delivered information that is both accurate and proven by experience and proper research, so I don...
by Synther
Mon Oct 23, 2023 4:40 am
Forum: Mystery Sirens
Topic: Steelville, IL Mystery speakers
Replies: 5
Views: 23100

Re: Steelville, IL Mystery speakers

Definitely a vehicular siren, those speakers on the pole look like Federal TS100s. Another member of the board contacted them a while back, apparently it is a tornado siren.

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