Sorry to venture off topic, but does anybody know what replaced this siren (if anything)? I'm guessing a 2001...

Eric, I took the tape off and the wires appeared to be connected. All of the paper insulation completely disintegrated when I removed the tape. It's not really that important to me to have a truly "original" RCM3, so I'm going to build my own with a solid-state flasher. I found one on eBay...

Those vents sure do like Decots...I wonder if they'd let somebody on the roof (of the Minneapolis building) to check it out. The control cabinet could be in some electrical room on the top floor. It certainly would be interesting to take a look at how it was activated!

Flasher: The wires from the coil to the terminals were perfectly intact. I put a multimeter (set to ohms) directly on the coil leads after removing the coil from the flasher body since the terminals were EXTREMELY rusty. It read infinity, so it's open. :( I will proceed from here in building a new f...

Thanks for the tip, Jason! I connected the solenoids to the RCM3. First time in God knows how many years those have operated. The county only ever tested Alert and Attack and the city used a pager system. I flipped the modulator switch to "test" and high-tone solenoid kicked in...turned th...

I actually removed the fuse block and wired it directly, since it didn't have fuses in it when I removed it. I figured if the flasher and relay actually worked, then I'd put the fuse block (with new fuses) back in as a precaution. My RCM1 is so old (probably one of the originals, it wasn't one that ...

I haven't wired it to the RCM1, and no, the relay isn't noticeably doing anything. I don't have the lead from the Alert/Attack terminal to the AF timer wired up (since I don't have a timer), but I would think the flasher would operate regardless as long as there is power to it (when the modulator sw...

Great find! Decot's are awesome; I'm really surprised there's one in MPLS.

Those DSA's certainly could be property of MPLS, but it surprises me that they invested in DSA's, as the rest of their system is electromechanical (t-bolt 1000T's, 2001's, SD-10's).

Was the Allertor replaced, or did they just disconnect it?