Cyclone

ACA Cyclone in York, Pennsylvania (formerly part of the Three Mile Island system, still remains standing as of June 2017)

The Cyclone was an omnidirectional siren produced by Alerting Communicators of America (ACA) and came in 2 models: The Cyclone 120 and 125 which superseded it. The Cyclone is a 8/12 port siren. All variations were able to be fitted with a damper which would be used for local code signalling. Examples of the Cyclone sounding these signals can be seen in the ACA promotional videos which are up on YouTube.