Model 5

Model 5/7, and Model 5T File:IMG 0233.JPG Model 5/7 in Lemoyne, Pennsylvania. Original advertisements (?) for the Model 5, circa. late 1970's
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Company	Federal Signal Corporation
Type	Electromechanical
Sound output	113 (Single Tone) 108 (Dual Tone)
Documentation	Manual

The Model 5/7 was a siren produced by Federal Signal Corporation. The siren came in the three different port ratio's. 12, which is the most common. 8, which isn't found on many models, and 9/12, only found on Model 5T's. A Model 5A is a three phase siren, and a Model 5B is single phase. Model 7's are three phase sirens like the Model 5A, but seem to have a faster windup. However, Model 5T's are dual tone only.