Thunderbolt 1000T, located at the corner of Kalanianaole Hwy and Keahole st. Monthly test on the first working day of the month at 11:45am here in the State of Hawaii. This Thunderbolt is possibly set on the highest chopper setting (Level 7). One of many older electromechanical sirens here destined to be replaced by a Federal Signal Modulator.
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Description of "Thunderbolt siren"
Thunderbolt 1000T, located at the corner of Kalanianaole Hwy and Keahole st. Monthly test on the first working day of the month at 11:45am here in the State of Hawaii. This Thunderbolt is possibly set on the highest chopper setting (Level 7). One of many older electromechanical sirens here destined to be replaced by a Federal Signal Modulator.
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