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:

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Transcribed Info    

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Literature in Adobe Pdf    

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Bulletin515 1 Print 12:18 am 03/30/2015699.4k

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Bulletin515 1 Web 12:16 am 03/30/2015171.1k

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Bulletin515 2 Print 12:17 am 03/30/2015637.1k

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Bulletin515 2 Web 12:17 am 03/30/2015187.4k

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Bulletin515 3 Print 12:18 am 03/30/2015589.6k

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Bulletin515 3 Web 12:17 am 03/30/2015167.8k

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Bulletin515 4 12:17 am 03/30/2015120.6k

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Bulletin515 4 Print 12:19 am 03/30/2015543.6k

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Bulletin516 1 Print 12:18 am 03/30/2015432.7k

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Bulletin516 1 Web 12:17 am 03/30/2015132.5k

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Bulletin516 2 Web 12:18 am 03/30/2015134.1k

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Bulletin517 Print 12:19 am 03/30/2015516.6k

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Bulletin517 Web 12:18 am 03/30/2015115.3k

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Bulletin518 1 Print 12:21 am 03/30/20151k

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Bulletin518 1 Web 12:18 am 03/30/201564.6k

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Bulletin518 2 Print 12:19 am 03/30/2015304.5k

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Bulletin518 2 Web 12:18 am 03/30/201573.9k

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Bulletin5010 1 Print 12:16 am 03/30/2015579.2k

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Bulletin5010 1 Web 12:16 am 03/30/2015147.9k

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Bulletin5010 2 Print 12:17 am 03/30/2015781.9k

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Bulletin5010 2 Web 12:16 am 03/30/2015221k

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Bulletin5010 3 Print 12:17 am 03/30/2015529.7k

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Bulletin5010 3 Web 12:16 am 03/30/2015127.7k

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Capacities Print 12:20 am 03/30/2015503.1k

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Capacities Web 12:20 am 03/30/2015140.5k

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Diaphone 1 Print 12:23 am 03/30/2015457.5k

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Diaphone 1 Web 12:19 am 03/30/2015161k

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Diaphone 2 Print 12:20 am 03/30/2015463.4k

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Diaphone 2 Web 12:20 am 03/30/2015161.5k

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Gamewelldiaphone Print 12:23 am 03/30/2015645.4k

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Gamewelldiaphone Web 12:20 am 03/30/2015205.7k

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Gamewellpage19 Print 12:23 am 03/30/2015391.8k

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Gamewellpage19 Web 12:22 am 03/30/20151k

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Gamewellpage20 Print 12:23 am 03/30/2015414.3k

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Gamewellpage20 Web 12:22 am 03/30/2015106.4k

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Public Alarm Print 12:23 am 03/30/2015318.1k

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Public Alarm Web 12:23 am 03/30/2015102.1k

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Valve 1 Print 12:24 am 03/30/2015453k

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Valve 1 Web 12:23 am 03/30/2015188.4k

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Valve 2 Print 1:04 am 03/30/2015617.1k

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Valve 2 Web 12:25 am 03/30/20151k

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Valve 3 Print 12:25 am 03/30/2015207.4k

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Valve 3 Web 12:25 am 03/30/20151k

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Valve 4 Print 1:04 am 03/30/2015348.2k