This one is based on my High School Fire Alarm system. I really thought it was neat.
Coal City High School:
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The horns in the hallways are Simplex 2903-2901+9838 horns
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The Art Room has a Space Age Electronics 2DCD horn on an AV32 strobe plate
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The Media Center has a Simplex 4903-9219 horn
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The Food Science classrooms has an Edwards 892-2B horn
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And finally, the Cafeteria Kitchen has a Gentex SHG horn