Thunderbolt

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The Thunderbolt siren was a supercharged electromechanical siren produced by Federal Electric, later Federal Sign & Signal and Federal Signal.

Thunderbolt 1000

Thunderbolt 1000T

Thunderbolt 1003

The Thunderbolt 1003 uses two solenoids that are attached to the upper portion of the siren to create a third, high-low signal, which can be used as a fire signal.

Other models

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