It was produced between 1953 to the 1990s as an alternative to Federals popular STH-10. The model number stood for Special Tone Low, 10 Horsepower. It is an omnidirectional electromechanical siren with a 10HP motor driving the chopper. Federal Signal Produced 1953 - 1980's Type Electromechanical Sound output 1141dBc at 100 feet Frequency 405 1Hz Horsepower 7.5-10 1 Documentation Manual The STL-10was an outdoor warning siren produced by the Federal Signal Corporation. The design was later taken to Excel Alerting Communicators by Jim Biersach and Dale Moeller before they bought American Signal Corporation back from Hörmann GmBH. The STL-10 (Single Tone Low, 10 Horsepower) is a discontinued civil defense siren that was produced by Federal Signal. The siren was originally developed by Alerting Communicators of America shortly before their bankruptcy in 1993. The design is super efficient and is known to be heard miles away, even though it's not rated to do so. Located in downtown Williamston, SC at Williamston fire department off of Main St. General Characteristics Predecessor Federal Signal STH-10 Created On iOS Wingspan 10.3ft (3.2m) Length 5.8ft (1.8m) Height 44.4ft (13.5m) Empty Weight N/A. This siren is wildly famous for it's low penetrating tone by the 8 port rotor. Electronic Sirens An Electronic FS Siratone Siren. STL-10 Has 3 Tones like Attack, Fire, Alert The fire is a Hi-Lo tone system That projects High and Low pitches from the Projector cone. The model number stood for Single Tone Low, 10 Horsepower. An example of a Rotating Siren is a ACA P-50. The STL-10 was an outdoor warning siren produced by the Federal Signal Corporation. For this, they need a proper Rotator and Brush System installed in them. Unidirectional, or Rotating Sirens often have a horn, rotating 360 Degrees around. It is one of four sirens in Tempest Siren Series line. An example of an Omnidirectional: the Federal Signal Model 5. The T-128 is an electromechanical siren produced by American Signal Corporation.
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