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invader1026765
 
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thunderbolt video of solinoids in operation

Thu Jul 17, 2008 6:52 pm

check this out http://www.youtube.com/watch?v=CbnqeiIZcjg
"Mechanical sirens provide maximum reliability and the best cost to coverage ratio.
Electronic sirens provide the versatility of producing many different sounds as well as public address."
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EL1998P71
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Thu Jul 17, 2008 10:33 pm

This was already posted awhile ago.
Proud Owner of too many sirens, lightbars, civil defense items, and diecast cars
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Federal Signal fan
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Fri Jul 18, 2008 1:03 am

Interesting video, that is how you can tell the Thunderbolt 1003 apart from other in the series. Very interesting, ironic that I was just browsing that video yesterday. I think it clearly demonstrates the use of the openings and the operation of the 'hi-lo' signal.
So, apparently, I like Federal Signal...
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