Model 7: Difference between revisions

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{{Infobox siren
{{Infobox siren
|title =Model 7 and 7T
|title = C3 1/2
[[File:Image (2).jpg|thumb|Original advertisements (?) for the Model 7, circa. late 1970's]]
[[File:Image (2).jpg|thumb|Original advertisements (?) for the Model 7, circa. late 1970's]]
|company =[[Federal Signal Corporation]]
|company =[[Federal Signal Corporation]]
Line 19: Line 19:




The Model 7 was a 7.5 horse power, mechanical, omni-directional siren produced by [[Federal Signal Corporation]]. This siren is often confused with the [[Model 5]] due to Federal Signal making a mistake in their naming scheme. Late Model 7s were called Model 5s by Federal Signal even though they were 7.5HP which pulls it out of line with their standard naming scheme based on horse power ratings.
The C3 1/2, or commonly known as Model 7 or Model 5 was a 5, 7.5, and sometimes 10 horsepower, mechanical, omnidirectional siren produced by [[Federal Signal Corporation]]. The rotor in the C3 1/2 is 18" and shares it with the [[500DHTT]].


Model 7 was available in 3 different chopper configurations: 8 port single tone, 12 port single tone, and 9/12 port dual tone. The siren was housed in a very simple enclosure that resembles an air vent found on building roofs. The housing came in either painted steel or stainless steel.
Model 7 was available in 3 different chopper configurations: 8 port single tone, 12 port single tone, and 9/12 port dual tone. The siren was housed in a very simple enclosure that resembles an air vent found on building roofs. The housing came in either painted steel or stainless steel.

Revision as of 16:00, 11 June 2024

C3 1/2
Original advertisements (?) for the Model 7, circa. late 1970's
[[File:{{{image}}}|200px]]
Company Federal Signal Corporation
Produced 1938-1987
Type Electromechanical
Sound output 113 or 108[1]
Documentation Manual


The C3 1/2, or commonly known as Model 7 or Model 5 was a 5, 7.5, and sometimes 10 horsepower, mechanical, omnidirectional siren produced by Federal Signal Corporation. The rotor in the C3 1/2 is 18" and shares it with the 500DHTT.

Model 7 was available in 3 different chopper configurations: 8 port single tone, 12 port single tone, and 9/12 port dual tone. The siren was housed in a very simple enclosure that resembles an air vent found on building roofs. The housing came in either painted steel or stainless steel.

  1. ↑ (PDF) Service Manual for Models 2, 7, SD10, STH10, STL10. Federal Signal Corporation. Retrieved October 22, 2017.
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