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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Transcribed Info    

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Literature in Adobe Pdf    

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Bulletin515 1 Print4:11 pm 04/07/2017699.4k

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Bulletin515 1 Web4:11 pm 04/07/2017171.1k

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Bulletin515 2 Print4:11 pm 04/07/2017637.1k

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Bulletin515 2 Web4:11 pm 04/07/2017187.4k

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Bulletin515 3 Print4:11 pm 04/07/2017589.6k

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Bulletin515 3 Web4:11 pm 04/07/2017167.8k

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Bulletin515 44:11 pm 04/07/2017120.6k

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Bulletin515 4 Print4:11 pm 04/07/2017543.6k

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Bulletin516 1 Print4:11 pm 04/07/2017432.7k

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Bulletin516 1 Web4:11 pm 04/07/2017132.5k

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Bulletin516 2 Web4:11 pm 04/07/2017134.1k

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Bulletin517 Print4:11 pm 04/07/2017516.6k

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Bulletin517 Web4:11 pm 04/07/2017115.3k

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Bulletin518 1 Print4:11 pm 04/07/20171k

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Bulletin518 1 Web4:11 pm 04/07/201764.6k

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Bulletin518 2 Print4:11 pm 04/07/2017304.5k

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Bulletin518 2 Web4:11 pm 04/07/201773.9k

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Bulletin5010 1 Print4:11 pm 04/07/2017579.2k

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Bulletin5010 1 Web4:11 pm 04/07/2017147.9k

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Bulletin5010 2 Print4:11 pm 04/07/2017781.9k

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Bulletin5010 2 Web4:11 pm 04/07/2017221k

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Bulletin5010 3 Print4:11 pm 04/07/2017529.7k

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Bulletin5010 3 Web4:11 pm 04/07/2017127.7k

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Capacities Print4:11 pm 04/07/2017503.1k

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Capacities Web4:11 pm 04/07/2017140.5k

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Diaphone 1 Print4:11 pm 04/07/2017457.5k

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Diaphone 1 Web4:11 pm 04/07/2017161k

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Diaphone 2 Print4:11 pm 04/07/2017463.4k

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Diaphone 2 Web4:11 pm 04/07/2017161.5k

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Gamewelldiaphone Print4:11 pm 04/07/2017645.4k

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Gamewelldiaphone Web4:11 pm 04/07/2017205.7k

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Gamewellpage19 Print4:11 pm 04/07/2017391.8k

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Gamewellpage19 Web4:11 pm 04/07/20171k

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Gamewellpage20 Print4:11 pm 04/07/2017414.3k

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Gamewellpage20 Web4:11 pm 04/07/2017106.4k

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Public Alarm Print4:11 pm 04/07/2017318.1k

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Public Alarm Web4:11 pm 04/07/2017102.1k

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Valve 1 Print4:11 pm 04/07/2017453k

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Valve 1 Web4:11 pm 04/07/2017188.4k

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Valve 2 Print4:11 pm 04/07/2017617.1k

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Valve 2 Web4:11 pm 04/07/20171k

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Valve 3 Print4:11 pm 04/07/2017207.4k

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Valve 3 Web4:11 pm 04/07/20171k

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Valve 4 Print4:11 pm 04/07/2017348.2k