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Thunderbolt 1,003 all 3 Signals
September 2, 2010
THIS IS THE OFFICIAL AND ORIGINAL VIDEO I HAVE,
NOTE: THIS IS NOT MY VIDEO!!!! i uploaded this because the user of this video deleted the video due to, too many bad comments on videos (that's what i heard) but i won't let this get out of hand and so i uploaded it so u guys can watch it as well
any questions, comment below or send a massage i do read your comments so no negative crap
FIRST signal is fire, high low, is sirens that use solenoids to block the air in one row of ports/openings preventing that tone to sound thus only the other row will sound as long as it is not blocked and "hi-lo" is created with that cycle repeating how fast it is set to
SECOND is called alert, popular for warning others, for a tornado/testing, its where the tone is steady
THIRD is called attack, popular for firehouses that don't have sirens with solenoids, used as well as some siren testing after alert