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 is a supercharged siren that is part of the Thunderbolt siren series, the Thunderbolt 1003 uses two solenoids that are attached to the upper portion of the siren, these solenoids are used to create the Hi-Lo signal, which is an alternation between lower and higher frequencies from the siren's chopper.

Other models