The Federal Signal SD-10 was a dual-toned, 9/12 port, 10HP electromechanical siren produced by the Federal Sign & Signal Corporation. It shared the same rotor and stator assembly with the Model 5AT/5BT. It was produced from the late 1950's to the late 70's where it was discontinued. There were 2 models produced: The SD-10A is the most common model and is powered by 240V 3-phase power and the SD-10B which runs off of 240V single-phase power. It produces a sound of 109dB at 100 feet, and weighed about 500 pounds.
RPM: 3450RPM full speed
dB rating at 100 feet: 109dB
Motor type: 10HP electric induction motor
Power requirements for SD-10A: 208/240Vac 3-phase, 28/14A, 50/60hz
Power requirements for SD-10B: 240Vac single-phase, 56A, 60hz only
Motor starter: Federal RC5 motor starter required to operate.
Height: 80" (with metal legs)
Cities that currently use SD-10 sirensEdit
Tucson, AZ (at least one is still tested once a month), most have been removed
Sarpy County, Nebraska
Beaver Dam, Wisconsin (Only one remains and is tested once a month)
Allen, Texas (most have been removed and replaced with Federal Signal 2001s)
Branson, Missouri (Slowly getting replaced)
Mulberry Grove, Illinois
Pea Ridge, Arkansas
Deerfield, New York (Operates as a fire siren for the Volunteer Fire Dept.)
Kaalea, Hawaii (Status of siren(s) unknown, most likely removed)
Earleville, MD (Operates as a fire alert signal) ...And more.