Very cool to see another person interested in analog siren controls like me. I saw you mentioned using the LM567 in a redesign, I'm working on a full controller using that exact chip. An even older decoder, the Federal Signal Siratrol, used no ICs at all and used a chunky LC oscillator for tone disc...

maybe try 154.070. It's listed as the Fire Pager freq for Bloomington on RadioReference.com. Very helpful site for stuff like this.
https://www.radioreference.com/db/browse/ctid/1336

Supposedly there's a siren in Baker City Oregon as their website says, but I looked and couldn't find one. Any ideas?? https://www.bakercity.com/2216/Disaster-Preparedness If you know, please answer. Also by the way I'm new here and this is easily my favorite website now. :D That siren is mounted i...

Non-Zero wrote: ↑

Thu Feb 08, 2024 4:09 pm

SamtheSirenMan(531) wrote: ↑

Mon Feb 05, 2024 6:54 pm

IIRC Sentry's S.T.A.R. system uses an encrypted DTMF string somewhere around 20 or 30 digits long. I've only heard it once in a video, its quite unusual sounding.

Got a link?

https://www.facebook.com/reel/818106749 ... tid=xCPwDs

Assuming a dB loss rate of 10dB per distance doubled and using Whelen’s 129dB @ 100’ rating, it would be about 89dB.

IIRC Sentry's S.T.A.R. system uses an encrypted DTMF string somewhere around 20 or 30 digits long. I've only heard it once in a video, its quite unusual sounding.

LukeH wrote: ↑

Fri Feb 02, 2024 1:30 am

GREAT work Sam!

Thanks Luke! I’m hoping to get a better picture camera in the future for getting more tag shots of these things. Only reason the tag shot of John Day’s was legible is because I was standing 6 feet under it…

I was recording the nooner Bullard in Rickreall when I heard the nooner in the next town over go off- Dallas, an STH about 4 miles away.

More new info! Recently the Camas Valley FD in Oregon restored their Bullard, and posted about it on their facebook. They mentioned that it had a 10HP motor, although I am still skeptical of the given the size and volume of these, and the way E.D. Bullard did the model numbers of their other sirens,...

The way you describe it makes it sound like the rectifier failed and the siren auto transferred to the batteries, which would run it at a lower RPM. Not sure though, as I don't know how ASC sirens handle that.