Mobil Directo: Difference between revisions

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(Added a photo of a Gas MD, and added what kind of engine it had.)
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The '''Mobil Directo''' was a siren manufactured by the Biersach & Niedermeyer Co. The siren came in two types. An '''Electric Motor''' Mobil Directo only came in a Dual Tone 10/12 port ratio. However, the '''Gas Motor''' Mobil Directo only came in an Single Tone 8 port ratio. Many gas motor units were eventually converted with an electric motor like the 10/12 port units. When the company evolved into [[Alerting Communicators of America]] the siren was evolved into the [[Allertor 125]].
The '''Mobil Directo''' was a siren manufactured by the Biersach & Niedermeyer Co. The siren came in two types. An '''Electric Motor''' Mobil Directo only came in a Dual Tone 10/12 port ratio. However, the '''Gas Motor''' Mobil Directo only came in an Single Tone 8 port ratio. Many gas motor units were eventually converted with an electric motor like the 10/12 port units. When the company evolved into [[Alerting Communicators of America]] the siren was evolved into the [[Allertor 125]].
[[File:York.jpg|thumb| a Mobil-Directo that still retains its original gasoline engine. The engine was an air cooled Wisconsin 25HP V-4 engine. ]]


[[Category:Dual Toned Sirens]][[Category:Single Toned Sirens]][[Category:Electromechanical Sirens]][[Category:Rotating Sirens]]
[[Category:Dual Toned Sirens]][[Category:Single Toned Sirens]][[Category:Electromechanical Sirens]][[Category:Rotating Sirens]]


[[Category:Sirens]]
[[Category:Sirens]]

Revision as of 19:08, 27 February 2018

Mobil Directo
Company Biersach & Niedermeyer Co.
Produced ~1942-1967
Type Electromechanical
Sound output 125 dBc at 100 feet
Succeeded by Allertor 125


The Mobil Directo was a siren manufactured by the Biersach & Niedermeyer Co. The siren came in two types. An Electric Motor Mobil Directo only came in a Dual Tone 10/12 port ratio. However, the Gas Motor Mobil Directo only came in an Single Tone 8 port ratio. Many gas motor units were eventually converted with an electric motor like the 10/12 port units. When the company evolved into Alerting Communicators of America the siren was evolved into the Allertor 125.

a Mobil-Directo that still retains its original gasoline engine. The engine was an air cooled Wisconsin 25HP V-4 engine.