General Info

The Diaphone warning horn is powered by pressured air. They are well over 80 years old and are capable of producing 1 second blasts at one half second intervals. Most reports say the Diaphone can be heard about 6 miles with optimal conditions (terrain, tall buildings, atmospheric conditions).

Technical Documents, Old Brochures:

TypeDrawer/FileDate ModifiedSize

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PDFs    

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Diaphone Horn with Reducing Valve and Dirt Strainer 1:06 am 03/30/201526.5k

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Diaphone Parts A 22908 1:06 am 03/30/201527k

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Maintenance Instructions for the Type B Diaphone Horn 1:06 am 03/30/201527.5k