I wrote a post on Friday, March 29th about the Whelen WPS-2806 near my house malfunctioning around 4:30 AM, when it activated off and on for about an hour. It was out of service for about a week or so, and the motherboard was sent to Whelen so they could determine what caused the malfunction. Long story short, three Tornado Warnings were issued for our county late this afternoon/early evening and the nearby Whelen 2807 activated three times, and I immediately noticed that it now has the the higher-pitched 2900-series Whelen tone/sound. It was activated in emergency mode volume and not test mode volume (of course!), so it was balls-to-the-wall loud! And it didn't do the three semi-long woops right after it activated before it went into full alert mode, like it did when it still sounded like a 2806. Any explanation for that, as far as why it used to woop three times but now it doesn't?
I'm guessing the sound card was replaced, or it's part of the new motherboard? Some of you are more knowledgable than I am about the electronics, etc., on these sirens so maybe you can explain this in more detail. Thanks!
Last edited by FedTB on Wed May 22, 2019 11:54 pm, edited 5 times in total.