"Accidental" siren activation in St. Louis County,

[Archon]

Milwaukee had a Western Electric activation system and the old sirens went off one sat for about a 1 hr problem in the controll

[Robert Gift]

Milwaukee had a Western Electric activation system and the old sirens went off one sat for about a 1 hr problem in the controll

Must admit, I would have loved that.
I would have visited different sirens - IF NOT ELECTRONIC

But mechanical sirens have a 15 minute duty cycle.
Hope no motors were damaged by running too long.
But I believe most have internal temperature switches to open if overheated.

When did this happen?

[SirenMadness]

I thi nk that the motors could run some time after fifteen minutes, as it will not harm them too much.

[C. Bryant]

You can bet the Ma. Bells will be happy

to read about the Siren's - Covert ?
sounding - they need to get more basic leased line accounts ,in
this era or Wireless Data Comm. More $$ for Christmas , like
a happy landlord with No vaccant apartments .

[Archon]

Milwaukee had a Western Electric activation system and the old sirens went off one sat for about a 1 hr problem in the controll

Must admit, I would have loved that.
I would have visited different sirens - IF NOT ELECTRONIC

But mechanical sirens have a 15 minute duty cycle.
Hope no motors were damaged by running too long.
But I believe most have internal temperature switches to open if overheated.

When did this happen?

This happened back in about 1970 when Milwaukee had all Model 2's all I rember is it was on a Saturday.

Now Milwaukee County has mostly T-135's and its a Compualert system.
Milwaukee does not own or control any sirens anymore.

[q2bman]

My old town used Motorola Two Tone Encodeing for the activation. "Someone" recorded this and transmitted the recording to see if it would work. It did to that person's suprise. That person was freaked out and would never do that again. They have since changed back to a lease line system for some reason. But, I don't know how much more secure that is. I was in bed one night and heard a single 2t22 sound at 3 am. It ran for quite some time. I would guess that maybe it also possible to hack the landline systems too. BIG trouble if you get caught, NOT RECOMENDED!!

[Jim_Ferer]

The only way to avoid it completely is with some kind of spread-spectrum radio activation with an encrypted signal. It doesn't have to be so secure it would take the NSA to crack it, just enough to deter some d***head from messing with it.

[q2bman]

true, or even something as simple as rolling codes like car alarm transmitters.

[Robert Gift]

true, or even something as simple as rolling codes like car alarm transmitters.

Is that a code which changes?