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Unknown Arkansas City Whelens
Posted: Fri Apr 04, 2008 10:35 am
by coyoteunknown
Re: Unknown Arkansas City Whelens
Posted: Fri Apr 04, 2008 12:33 pm
by ver tum
I'm thinking that it's either a 2800, or an older Vortex Omni.
Posted: Fri Apr 04, 2008 10:56 pm
by Whelen Rules
Sounds like an older model WPS 2910. The tone is too low for 2800 series.
Posted: Fri Apr 04, 2008 11:32 pm
by ver tum
Whelen Rules wrote:Sounds like an older model WPS 2910. The tone is too low for 2800 series.
Do the newer 2910's sound the same as 4004's? When was the pitch for the 2910 razed?
Posted: Sat Apr 05, 2008 12:03 am
by Whelen Rules
The new 2900 and 4004 series sirens sound a 560 hz pitch. The 560hz was determined to be in the sweet spot for the amplifiers for the WPS2900 and produced greater decibel levels for the WPS2900. The Vortex and other tone only Whelens remain at 455 hz range.