The Siren Board

Discussion of Outdoor Warning Systems
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PostPosted: Wed Mar 13, 2019 5:19 am 
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Recently I acquired a Federal Signal MC, and along with that, the guts of two classic ATI controllers. The ATI controllers are from Baytown, Texas. From what I can tell, the controllers(or at least the amplifier sets) are 24V. They each have 4 400W amplifiers, 1 of them has a single amplifier labeled "HPSS 20009" and the other has 2 labeled the same way, the rest being unlabeled. The only difference I could find between the 2 different amps was a simple component which was of a different style. While searching old posts on ARS, I found a very similar looking amplifier from an old ebay listing that looked very similar on the front but was marked "HPSS 20036" and was 1600W. My controllers ran those funky DSA-look-alikes. I do not have the cabinet and I just have the amplifier set and the main board. Unfortunately, I do not know how to properly wire them up and hook them. I have 2 12V batteries that supply a steady 24.4V. However I already blew 2 fuses trying one of the main boards on 12V(I was told that I may as well) on the power port. No documentation for these sirens exist, thus no manuals, at least in hands of siren enthusiasts. ATI was of no help either, I simply got a response email from them with (HORRIBLE) grammar stating that they do not support old sirens anymore. So I am at a standstill with these controllers, not knowing how to power the main board.
File comment: Close up of the center of the main board.
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ATI1.jpg [ 245.05 KiB | Viewed 284 times ]
File comment: Picture of the entire control board (a few ports are cropped off, the power in port is on the very upper right).
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ATI2.jpg [ 291.38 KiB | Viewed 281 times ]
File comment: The marking inside of the amp set.
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ATI3.jpg [ 101.54 KiB | Viewed 281 times ]
File comment: Broad picture of the inside of the amp set with 2 amps removed.
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ATI4.jpg [ 183.23 KiB | Viewed 281 times ]
File comment: Inside of the unlabeled amp.
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ATI5.jpg [ 144.65 KiB | Viewed 281 times ]
File comment: Inside of the amp labeled "HPSS 20009".
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ATI6.jpg [ 191.72 KiB | Viewed 281 times ]
File comment: The 2 different amps side by side.
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ATI7.jpg [ 153.85 KiB | Viewed 281 times ]
File comment: Picture of the entire amp set.
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ATI8.jpg [ 170.71 KiB | Viewed 281 times ]


Attachments:
File comment: Picture of the entire control board (a few ports are cropped off, the power in port is on the very upper right).
[ attachment ]
ATI2.jpg [ 291.38 KiB | Viewed 281 times ]

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PostPosted: Thu Mar 14, 2019 4:20 pm 
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Here is 2 good threads that discusses these old ATI controllers.
viewtopic.php?t=15232
And
https://airraidsirens.net/forums/viewto ... =2&t=15184

Uncommonsense posted a picture of the HPSS 20036 amp from an eBay listing that I mentioned in the original post. The seem to have the same modular amp connections as my 400W amps. It really leaves a lot of questions. Did the same modular controllers that support the 400W amps accept the 1600W amps? Wouldn't make much sense though unless you literally wired 8 drivers in series to connect it to the board, the have all 64 theoretical drivers, assuming all 4 amp slots are filled with those 1600W amps. Perhaps they only used a single one of these for a given siren. All my rambling goes to show how little we know about them, which is a shsme because these old ATI controllers aren't rudimentary technology - they are programmable, can do voice and tones, I assume they support 2 way. These controllers I have are very interesting, but nobody knows anything about it, or how to use it.

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PostPosted: Thu Mar 14, 2019 8:36 pm 
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interesting design.
you would think it would run off of the same volatage as the rest of the controller, but it doesnt.

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PostPosted: Thu Mar 14, 2019 9:12 pm 
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With ATI, it's anyone's guess as to how anything works.

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PostPosted: Fri Mar 15, 2019 6:14 am 
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Model L wrote: *
interesting design.
you would think it would run off of the same volatage as the rest of the controller, but it doesnt.
I haven't actually tested it on 24V yet, but the fact the fuse immediately blew on 12V concerns me. Possibly a bad board?

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PostPosted: Sat Mar 16, 2019 1:43 am 
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It almost looks like the 2 black electrolytic capacitors on the upper left, on the last photo, are bulging & leaking. Either would mean that they are bad. They are to the right of TP-14, and, left of the grey ribbon cable. One of the seems to be C11. Note that these types of capacitors do age & go bad.


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PostPosted: Sat Mar 16, 2019 12:53 pm 
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Hacksaw wrote: *
It almost looks like the 2 black electrolytic capacitors on the upper left, on the last photo, are bulging & leaking. Either would mean that they are bad. They are to the right of TP-14, and, left of the grey ribbon cable. One of the seems to be C11. Note that these types of capacitors do age & go bad.
These don't look like capacitors, more like inductor coils with some kind of thermoshrink wrap arround 'em

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PostPosted: Mon Mar 18, 2019 4:05 pm 
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on the amp board there are 2 fuses. check these as well.

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