Sat Jul 15, 2006 8:53 am
Most older Darley Champion sirens consisted of a Model 2 or a Model 5 with a slotted or louvered housing over it. Newer models were shaped like their Federal counterparts, only with more rounded covers, and one model had eight, stubby horns coming out of it. Given that the Model 5 or STH-10 guts inside had twelve ports that were not directly connected to the horns, this seemed like a strange type of housing. When the fire chief graciously tested one of these for me, it wasn't quite as loud as a Model 5 but still sounded like one. The most original Darley was a dual-headed horizontal siren with two eight-port, Model 5-sized rotors. There is one of these a few miles from me that sounds a deep, Sentry-like sound every day at noon. I actually heard it faintly one day on the Capitol Mall seven miles away in downtown Salem! I am not sure whether Darley ever modified dual-tone sirens.